WO2016116004A1 - Method and device for controlling voltage of bias point of modulator - Google Patents
Method and device for controlling voltage of bias point of modulator Download PDFInfo
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- WO2016116004A1 WO2016116004A1 PCT/CN2016/070902 CN2016070902W WO2016116004A1 WO 2016116004 A1 WO2016116004 A1 WO 2016116004A1 CN 2016070902 W CN2016070902 W CN 2016070902W WO 2016116004 A1 WO2016116004 A1 WO 2016116004A1
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- H04B10/25—Arrangements specific to fibre transmission
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- the present invention relates to the field of communications, and in particular to a method and apparatus for controlling a modulator bias point voltage.
- the optical phase modulation method represented by the 16QAM (Quadrature Amplitude Modulation) system has received more and more attention from the industry.
- the hexadecimal quadrature amplitude modulation method is a combination of amplitude modulation and phase modulation. Its spectrum utilization is 4bit/s ⁇ Hz, which is twice that of QPSK, which can double the overall system capacity and meet the future. The need for high speed communication.
- the 16QAM system modulator uses a lithium niobate modulator.
- the lithium niobate modulator has its transmission characteristics, or the bias point, changes with temperature and stress due to the characteristics of its own material. Therefore, the bias point of the lithium niobate modulator must be kept in real time by a certain method. ,stable.
- the modulator bias point for the 16QAM modulation system is controlled by adding pilot signals of various frequencies to the modulated signal of the lithium niobate modulator, and then separating from the output modulated signals.
- the information of these pilot signals or their difference frequency signals is analyzed to control the stability of the bias point. Since multiple pilot signals are required, the control loop is complicated, and the pilot signal itself means that the stability of the bias point is limited.
- Embodiments of the present invention provide a method and an apparatus for controlling a bias point voltage of a modulator to solve at least the problem that a modulator needs a plurality of pilot signals in the related art, so that the control loop is complicated.
- a method for controlling a modulator bias point voltage including:
- the first voltage value of the bias point is adjusted to a second voltage value in a predetermined step size, and the second voltage value is sent to a modulator; acquiring a second average optical power of the second feedback optical signal of the modulator, the second feedback optical signal corresponding to the second voltage value; if the second average optical power is The difference between the first average optical power is less than a preset threshold, and the second voltage value is used as the voltage value that meets the preset condition;
- the voltage value that satisfies the preset condition is sent to the modulator to control the voltage of the bias point.
- adjusting the second voltage value to the third step by using the predetermined step size And a third voltage value is sent to the modulator to obtain a third average optical power of the third feedback optical signal of the modulator, the third feedback optical signal corresponding to the third voltage value.
- the third voltage value increases the second voltage value.
- a voltage value obtained after the predetermined step size if the second voltage value is a voltage value obtained by decreasing the first voltage value by the predetermined step size, the third voltage value is The second voltage value decreases the voltage value obtained after the predetermined step size.
- the acquiring the first average optical power of the first feedback optical signal of the modulator includes:
- the first average optical power is obtained from the electrical signal.
- the method for controlling the voltage of the modulator bias point further includes:
- the voltage value that satisfies the preset condition is stored.
- a control device for a modulator bias point voltage comprising: a first acquisition module configured to acquire a first voltage value of a preset bias point, and to a voltage value is sent to the modulator;
- a second acquiring module configured to acquire a first average optical power of the first feedback optical signal of the modulator, where the first feedback optical signal corresponds to the first voltage value
- a processing module configured to repeatedly perform the following operations until a voltage value that satisfies a preset condition is obtained: the first voltage value of the bias point is adjusted to a second voltage value in a predetermined step size, and the Transmitting a voltage value to the modulator; acquiring a second average optical power of the second feedback optical signal of the modulator, the second feedback optical signal corresponding to the second voltage value; if the second average And the difference between the optical power and the first average optical power is less than a preset threshold, and the second voltage value is used as the voltage value that meets the preset condition;
- a control module configured to send the voltage value satisfying the preset condition to the modulator to control a voltage of the bias point.
- the processing module is further configured to: if the difference between the second average optical power and the first average optical power is not less than the preset threshold, The second voltage value is adjusted to a third voltage value, and the third voltage value is sent to the modulator to acquire a third average optical power of the third feedback optical signal of the modulator, the third feedback light The signal corresponds to the third voltage value.
- the third voltage value increases the second voltage value.
- a voltage value obtained after the predetermined step size if the second voltage value is a voltage value obtained by decreasing the first voltage value by the predetermined step size, the third voltage value is The second voltage value decreases the voltage value obtained after the predetermined step size.
- the second obtaining module includes:
- a receiving unit configured to receive an output optical signal from the modulator
- An optical coupling unit configured to divide the output optical signal into a first output optical signal for the modulator output, and the first feedback optical signal
- the photoelectric conversion unit is configured to perform photoelectric conversion on the first feedback optical signal to obtain an electrical signal corresponding to the first feedback optical signal;
- the optical power detecting unit is configured to obtain the first average optical power according to the electrical signal.
- control device for the modulator bias point voltage further includes:
- a storage unit configured to store the voltage value that satisfies a preset condition.
- the first voltage value of the preset bias point is obtained, and the first voltage value is sent to the modulator, and the first feedback light corresponding to the first voltage value of the modulator is acquired.
- the following operations are repeatedly performed until a voltage value that satisfies a preset condition is obtained: the first voltage value of the bias point is adjusted to a second voltage value in a predetermined step size, and Transmitting the second voltage value to the modulator; acquiring a second average optical power of the second feedback optical signal of the modulator, the second feedback optical signal corresponding to the second voltage value;
- the difference between the second average optical power and the first average optical power is less than a preset a threshold, the second voltage value is used as the voltage value satisfying the preset condition, and further, the voltage value satisfying the preset condition is sent to the modulator to control the voltage of the bias point
- FIG. 1 is a flow chart of a method of controlling a modulator bias point voltage according to an embodiment of the present invention
- FIG. 2 is a block diagram showing the structure of a control device for a modulator bias point voltage according to an embodiment of the present invention
- FIG. 3 is a block diagram showing the structure of a control device for another modulator bias point voltage according to an embodiment of the present invention.
- FIG. 4 is a schematic structural diagram of another apparatus for controlling a bias point voltage of a modulator according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram showing the hardware structure of a control device for a modulator bias point voltage according to a preferred embodiment of the present invention
- 6a is a schematic flow chart of a method for controlling a bias point voltage of a modulator according to an embodiment of the present invention
- 6b is another flow diagram of a method of controlling a modulator bias point voltage in accordance with an implementation of the present invention.
- FIG. 1 is a flowchart of a method for controlling a modulator bias point voltage according to an embodiment of the present invention. As shown in FIG. 1, the process includes The following steps:
- Step S102 acquiring a first voltage value of a preset bias point, and transmitting the first voltage value to the modulator;
- Step S104 acquiring a first average optical power of the first feedback optical signal of the modulator, where the first feedback optical signal corresponds to the first voltage value;
- Step S106 repeating the following operations until a voltage value that satisfies the preset condition is obtained: the first voltage value of the bias point is adjusted to the second voltage value in a predetermined step size, and the second voltage value is sent to the modulator; Acquisition modulation The second average optical power of the second feedback optical signal, the second feedback optical signal corresponds to the second voltage value; if the difference between the second average optical power and the first average optical power is less than a preset threshold, the second The voltage value is a voltage value that satisfies a preset condition;
- Step S108 transmitting a voltage value satisfying the preset condition to the modulator to control the voltage of the bias point.
- the frequency signal makes the control loop complicated, and the method that the modulator does not need to add any pilot signal does not only solve the problem that the modulator needs multiple pilot signals in the related art, and the control loop is complicated, and the cost is low.
- the control loop is simple and has a high stability effect, and the bias point voltage can also be controlled.
- the second voltage value is adjusted to a third voltage value in a predetermined step size, and the third voltage value is sent To the modulator, a third average optical power of the third feedback optical signal of the modulator is obtained, and the third feedback optical signal corresponds to the third voltage value. That is, if the difference between the second average optical power and the first average optical power is not less than the preset threshold, the voltage value is continuously adjusted to quickly and efficiently determine the voltage of the optimal bias point.
- the third voltage value is a voltage value obtained by increasing the second voltage value by a predetermined step size; If the second voltage value is a voltage value obtained by decreasing the first voltage value by a predetermined step, the third voltage value is a voltage value obtained by decreasing the second voltage value by a predetermined step. That is, in the case where the difference between the second average optical power and the first average optical power is not less than the preset threshold, the voltage value can be adjusted in the same step size, thereby quickly and efficiently determining the voltage of the optimal bias point.
- acquiring the first average optical power of the first feedback optical signal of the modulator comprises: receiving an output optical signal from the modulator; dividing the output optical signal into a first output optical signal for the modulator output, and a first feedback optical signal; photoelectrically converting the first feedback optical signal to obtain an electrical signal corresponding to the first feedback optical signal; and obtaining a first average optical power according to the electrical signal. That is, the detection of the average optical power is realized by photoelectric conversion.
- the method for controlling the modulator bias point voltage of the embodiment of the present invention further includes: storing a voltage value that meets a preset condition.
- the voltage value is stored in the ROM and will be used directly after power-on.
- the first voltage value of the preset bias point is obtained, and the first voltage value is sent to the modulator to obtain the first of the first feedback optical signal of the modulator corresponding to the first voltage value.
- the following operations are repeatedly performed until a voltage value that satisfies the preset condition is obtained: the first voltage value of the bias point is adjusted to the second voltage value in a predetermined step size, and the second voltage value is sent to the modulation Obtaining a second average optical power of the second feedback optical signal of the modulator, where the second feedback optical signal corresponds to the second voltage value; if the difference between the second average optical power and the first average optical power is less than a preset threshold, Then, the second voltage value is used as a voltage value that satisfies a preset condition, and further, a voltage solution that satisfies the preset condition is sent to the modulator to control the voltage of the bias point.
- the modulator needs a plurality of pilot signals, which makes
- a control device for the bias point voltage of the modulator is also provided, and the device is configured to implement the above-mentioned embodiments and preferred embodiments, and the description thereof has been omitted.
- the term "module” may implement a combination of software and/or hardware of a predetermined function.
- FIG. 2 is a structural block diagram of a control device for a modulator bias point voltage according to an embodiment of the present invention. As shown in FIG. 2, the device includes:
- the first obtaining module 202 is configured to acquire a first voltage value of a preset bias point, and send the first voltage value to the modulator;
- the second obtaining module 204 is configured to obtain a first average optical power of the first feedback optical signal of the modulator, where the first feedback optical signal corresponds to the first voltage value;
- the processing module 206 is configured to repeatedly perform the following operations until a voltage value that satisfies the preset condition is obtained: the first voltage value of the bias point is adjusted to the second voltage value in a predetermined step size, and the second voltage value is sent to a modulator; obtaining a second average optical power of the second feedback optical signal of the modulator, the second feedback optical signal corresponding to the second voltage value; if the difference between the second average optical power and the first average optical power is less than a preset threshold And using the second voltage value as a voltage value that satisfies a preset condition;
- the control module 208 is configured to send a voltage value that satisfies the preset condition to the modulator to control the voltage of the bias point.
- the processing module 206 is further configured to adjust the second voltage value to a third voltage value by a predetermined step if the difference between the second average optical power and the first average optical power is not less than a preset threshold. And transmitting a third voltage value to the modulator to obtain a third average optical power of the third feedback optical signal of the modulator, the third feedback optical signal corresponding to the third voltage value.
- the third voltage value is a voltage value obtained by increasing the second voltage value by a predetermined step size; If the second voltage value is a voltage value obtained by decreasing the first voltage value by a predetermined step, the third voltage value is a voltage value obtained by decreasing the second voltage value by a predetermined step.
- the second obtaining module 204 includes:
- the receiving unit 302 is configured to receive an output optical signal from the modulator
- the optical coupling unit 304 is configured to divide the output optical signal into a first output optical signal for the modulator output, And a first feedback optical signal;
- the photoelectric conversion unit 306 is configured to perform photoelectric conversion on the first feedback optical signal to obtain an electrical signal corresponding to the first feedback optical signal;
- the optical power detecting unit 308 is configured to obtain a first average optical power according to the electrical signal.
- FIG. 4 is a schematic structural diagram of another apparatus for controlling a bias point voltage of a modulator according to an embodiment of the present invention.
- a device for controlling a bias point voltage of a modulator according to an embodiment of the present invention is further provided. include:
- the storage unit 402 is configured to store a voltage value that satisfies a preset condition.
- the first voltage value of the preset bias point is obtained, and the first voltage value is sent to the modulator to obtain the first of the first feedback optical signal of the modulator corresponding to the first voltage value.
- the following operations are repeatedly performed until a voltage value that satisfies the preset condition is obtained: the first voltage value of the bias point is adjusted to the second voltage value in a predetermined step size, and the second voltage value is sent to the modulation Obtaining a second average optical power of the second feedback optical signal of the modulator, where the second feedback optical signal corresponds to the second voltage value; if the difference between the second average optical power and the first average optical power is less than a preset threshold, Then, the second voltage value is used as a voltage value that satisfies a preset condition, and further, a voltage solution that satisfies a preset condition is sent to the modulator to control the voltage of the bias point, and the modulator needs to be solved in the related art.
- the pilot signals make the
- the technical problem to be solved by the embodiments of the present invention is to provide a control method and device for a bias point of a 16QAM system modulator that is low in cost, easy to implement, simple in control loop, and high in stability, so that the bias of the 16QAM system modulator is The set point is relatively stable and the control is simple, thereby improving the stability of the system.
- the embodiment of the invention further provides a method for controlling a modulator bias point in a 16QAM modulation system, comprising the following steps:
- Embodiments of the present invention provide a control device for a modulator bias point in a 16QAM modulation system, which may include the following components:
- PIN tube Bandwidth 10G, photoelectric conversion in the feedback loop.
- Radio Frequency Power Detector RFPD: Root Meam Square-Direct Current (RMS-DC) chip, the main function is Convert the rms value of the signal to a dc output.
- RFPD Radio Frequency Power Detector
- RMS-DC Root Meam Square-Direct Current
- ADC Analog-to-Digital Converter
- DAC Digital-to-Analog Converter
- Micro Control Unit/digital signal processing (MCU/DSP) is set as the implementation of the feedback control algorithm.
- Embodiments of the present invention provide a low-cost 16QAM modulator bias point control scheme based on digital processing, which has the following beneficial effects:
- the average power detection and digitization processing manner can achieve relatively stable bias point of the 16QAM modulator.
- the present invention does not require any additional pilot signals, has a simple and easy to implement structure, has the advantages of high precision, high reliability, high responsivity, and flexible and simple control loop, and achieves a bias of 16QAM modulator. Point control is more convenient and facilitates debugging.
- the new 16QAM modulator system includes optocoupler, PIN tube, RF power detector, analog-to-digital converter, digital-to-analog converter and digital algorithm processing unit module to enable fast, stable and accurate implementation of 16QAM modulators.
- the locking of the bias point is not limited to the built-in PD bandwidth of the modulator, which is of great significance for the transmission of the ultra-100G dense wavelength division system.
- an embodiment of the present invention provides a preferred embodiment as shown in FIG. 5.
- the optical signal emitted from the laser is divided into EV and EH through a polarization beam splitter (PBS).
- the EV and EH are respectively divided into I light by the first 3dB coupler and the second 3dB coupler.
- the DSP adjusts the bias point feedback control signal to be converted into an analog voltage signal by the DAC, respectively, to control the first MZ modulator, the second MZ modulator, the third MZ modulator and the fourth MZ modulator. Set the point so that the average power finally detected is minimized. Ultimately, the correct biasing of the IQ bias point of the 16QAM modulator can be achieved.
- the output light is divided into output light and feedback light through a 5/95 coupler, 95% of which is used for the final 16QAM modulated output, and 5% of the output light is photoelectrically converted by the 10G PIN tube, and then the effective value of the signal is measured by RFPD.
- Converted to DC output the high-precision ADC collects the power into the digital signal processing chip DSP, and the DSP adjusts the bias point feedback control signal to be converted into an analog voltage signal by the DAC to control the bias point of the 16QAM modulator, so that the average power is finally detected.
- the smallest, that is, the correct offset of the phase bias point of the 16QAM modulator can be achieved.
- FIG. 6a and FIG. 6b A digital algorithm flow chart for implementing bias point voltage control of a 16QAM modulator in a DSP according to an embodiment of the present invention is shown in FIG. 6a and FIG. 6b:
- the DSP sends a midpoint value of the bias point (usually 3.5V), which is sent to the I and Q channels respectively through the DAC, and the output optical signal detected by the PD is collected by the ADC.
- the DSP reads the ADC data as the initial average optical power value.
- step size of 0.05V (according to the actual offset accuracy and modulation rate requirements can have different settings) increase / decrease the voltage value of the bias point, send again through the DSP, read the ADC value as new Average optical power value.
- the DSP compares the new average optical power value with the initial average optical power value. If the new value is less than the initial value, the new average optical power value is taken as the initial average optical power value, and the voltage value of the bias point is continuously increased/decreased, and step 2 is repeated; if the new value is greater than the initial value, the initial average is maintained. The optical power value is unchanged, the voltage value of the bias point is decreased/increased, and the ADC value is read as a new average optical power value.
- step 3 If step 3 so that the new average optical power value minus the initial optical power value is less than a certain small amount (represented by the voltage value, generally considered to be less than 0.001V), then the bias point at this time is the optimal bias. point. Store the offset point in the ROM of the DSP and use it directly after power-on.
- step 3 Repeat step 3 to follow the change in the bias point to ensure that the real-time bias point is in the proper position.
- the relationship of the amplitude of the 16QAM signal: relative to the DAC output, the I/Q path has two voltage amplitudes respectively, such that the high voltages V HI , V HQ , the low voltages V LI , V LQ .
- I/Q bias point automatic control For I signal, among them, Representing the phase of the first layer and the second layer constellation point in the constellation diagram, respectively, V ⁇ is the voltage required for the modulator phase change ⁇ .
- the average optical power of the I channel is:
- the average optical power has a minimum value; then, by feedback, the average output optical power is minimized to obtain the optimal bias point, that is, the lowest point of the bias point.
- the Q way bias point is the same.
- the best IQ bias point is obtained when the PD detects the optical power to a minimum.
- V I denotes the voltage of I
- V bI denotes the bias voltage of I
- V Q denotes the voltage of Q
- V bQ denotes Q Bias voltage
- the modulator output optical signal is detected with a PIN tube, an amplitude and In proportion, the rate is a non-return to zero (NRZ) signal of the modulation signal rate.
- the power of a certain bandwidth of the signal is detected, and by changing the position of the phase offset point to minimize it, the phase bias point can be controlled.
- modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
- the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
- the invention is not limited to any specific combination of hardware and software.
- the method and apparatus for controlling the bias point voltage of a modulator provided by the embodiments of the present invention have the following beneficial effects: solving the problem that the modulator needs multiple pilot signals in the related art, and the control loop is complicated. In turn, the effect of low cost, simple control loop and high stability is achieved.
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Abstract
Disclosed are a method and a device for controlling a voltage of a bias point of a modulator. The method comprises: acquiring a first voltage value of a preset bias point, and sending the first voltage value to a modulator; acquiring first average optical power of a first feedback optical signal of the modulator; repeating the following operations, until a voltage value meeting a preset condition is obtained: adjusting the first voltage value of the bias point to a second voltage value according to a predetermined step length, and sending the second voltage value to the modulator; acquiring second average optical power of a second feedback optical signal of the modulator; and if a difference between the second average optical power and the first average optical power is less than a preset threshold, using the second voltage value as the voltage value meeting the preset condition; and sending the voltage value meeting the preset condition to the modulator, to control a voltage of the bias point. By means of the present invention, at least the problem in related technologies that a control loop is complex due to the fact that a modulator needs multiple pilot signals is solved.
Description
本发明涉及通信领域,具体而言,涉及一种调制器偏置点电压的控制方法及装置。The present invention relates to the field of communications, and in particular to a method and apparatus for controlling a modulator bias point voltage.
光纤通信问世以来,一直向超高速***,超大容量波分复用***的方向发展。人们追求更高速率,更大容量***的脚步未曾止步,随着100G偏振复用正交相移键控(Polarization-multiplexed Quadrature Phase Shift Keying,简称为PM-QPSK)***的大规模商用,超100G***进入人们的视界。以16QAM(Quadrature Amplitude Modulation,正交振幅调制)***为代表的光相位调制方法越来越受到业界的重视。16进制正交调幅法是一种振幅调制和相位调制相结合的调制方式,其频谱利用率为4bit/s·Hz,是QPSK的两倍,可以使得整个***容量提升一倍,能够满足未来高速通信的需求。Since the advent of optical fiber communication, it has been developing in the direction of ultra-high-speed systems and ultra-large-capacity wavelength division multiplexing systems. People are pursuing higher speeds, and the steps of larger capacity systems have not stopped. With the large-scale commercialization of the 100G polarization-multiplexed Quadrature Phase Shift Keying (PM-QPSK) system, the super 100G The system enters people's horizons. The optical phase modulation method represented by the 16QAM (Quadrature Amplitude Modulation) system has received more and more attention from the industry. The hexadecimal quadrature amplitude modulation method is a combination of amplitude modulation and phase modulation. Its spectrum utilization is 4bit/s·Hz, which is twice that of QPSK, which can double the overall system capacity and meet the future. The need for high speed communication.
在全新的16QAM调制***中,由于星座点(也称矢量端点)的欧氏距离相对较短,为保证较好的***性能,调制器的偏置点的精确性,稳定性显得尤为重要。16QAM***调制器采用的是铌酸锂调制器。而铌酸锂调制器由于自身材料的特性,其传输特性,或者说偏置点会随温度和应力变化发生变化,因此必须通过一定的方法来使铌酸锂调制器的偏置点保持实时精确,稳定。In the new 16QAM modulation system, since the Euclidean distance of the constellation point (also called the vector endpoint) is relatively short, in order to ensure better system performance, the accuracy of the bias point of the modulator is particularly important. The 16QAM system modulator uses a lithium niobate modulator. The lithium niobate modulator has its transmission characteristics, or the bias point, changes with temperature and stress due to the characteristics of its own material. Therefore, the bias point of the lithium niobate modulator must be kept in real time by a certain method. ,stable.
目前,像QPSK调制***一样,16QAM调制***用的调制器偏置点的控制方法是在铌酸锂调制器的调制信号中加入多种频率的导频信号,然后从输出的调制信号中分离并分析这些导频信号或其差频信号的信息,从而控制偏置点的稳定。由于需要多个导频信号,使得控制环路复杂,同时导频信号本身意味着偏置点的稳定度有限。At present, like the QPSK modulation system, the modulator bias point for the 16QAM modulation system is controlled by adding pilot signals of various frequencies to the modulated signal of the lithium niobate modulator, and then separating from the output modulated signals. The information of these pilot signals or their difference frequency signals is analyzed to control the stability of the bias point. Since multiple pilot signals are required, the control loop is complicated, and the pilot signal itself means that the stability of the bias point is limited.
针对相关技术中调制器需要多个导频信号,使得控制环路复杂的问题,目前尚未提出有效的解决方案。In view of the problem that the modulator needs a plurality of pilot signals in the related art and the control loop is complicated, an effective solution has not been proposed yet.
发明内容Summary of the invention
本发明实施例提供了一种调制器偏置点电压的控制方法及装置,以至少解决相关技术中调制器需要多个导频信号,使得控制环路复杂的问题。Embodiments of the present invention provide a method and an apparatus for controlling a bias point voltage of a modulator to solve at least the problem that a modulator needs a plurality of pilot signals in the related art, so that the control loop is complicated.
根据本发明的一个实施例,提供了一种调制器偏置点电压的控制方法,包括:According to an embodiment of the present invention, a method for controlling a modulator bias point voltage is provided, including:
获取预先设置的偏置点的第一电压值,并将所述第一电压值发送至调制器;
Obtaining a first voltage value of a preset bias point, and transmitting the first voltage value to a modulator;
获取所述调制器的第一反馈光信号的第一平均光功率,所述第一反馈光信号对应于所述第一电压值;Obtaining a first average optical power of the first feedback optical signal of the modulator, where the first feedback optical signal corresponds to the first voltage value;
重复执行以下操作,直到得到满足预设条件的电压值:以预定的步长将所述偏置点的所述第一电压值调整为第二电压值,并将所述第二电压值发送至所述调制器;获取所述调制器的第二反馈光信号的第二平均光功率,所述第二反馈光信号对应于所述第二电压值;若所述第二平均光功率与所述第一平均光功率的差值小于预设门限,则将所述第二电压值作为所述满足预设条件的电压值;Repeating the following operations until a voltage value that satisfies a preset condition is obtained: the first voltage value of the bias point is adjusted to a second voltage value in a predetermined step size, and the second voltage value is sent to a modulator; acquiring a second average optical power of the second feedback optical signal of the modulator, the second feedback optical signal corresponding to the second voltage value; if the second average optical power is The difference between the first average optical power is less than a preset threshold, and the second voltage value is used as the voltage value that meets the preset condition;
将所述满足预设条件的电压值发送至所述调制器,以控制所述偏置点的电压。The voltage value that satisfies the preset condition is sent to the modulator to control the voltage of the bias point.
可选地,若所述第二平均光功率与所述第一平均光功率的差值不小于所述预设门限,则以所述预定的步长将所述第二电压值调整为第三电压值,并将所述第三电压值发送至所述调制器,获取所述调制器的第三反馈光信号的第三平均光功率,所述第三反馈光信号对应于所述第三电压值。Optionally, if the difference between the second average optical power and the first average optical power is not less than the preset threshold, adjusting the second voltage value to the third step by using the predetermined step size And a third voltage value is sent to the modulator to obtain a third average optical power of the third feedback optical signal of the modulator, the third feedback optical signal corresponding to the third voltage value.
可选地,若所述第二电压值为将所述第一电压值增大所述预定的步长后所得的电压值,则所述第三电压值为将所述第二电压值增大所述预定的步长后所得的电压值;若所述第二电压值为将所述第一电压值减小所述预定的步长后所得的电压值,则所述第三电压值为将所述第二电压值减小所述预定的步长后所得的电压值。Optionally, if the second voltage value is a voltage value obtained by increasing the first voltage value by the predetermined step, the third voltage value increases the second voltage value. a voltage value obtained after the predetermined step size; if the second voltage value is a voltage value obtained by decreasing the first voltage value by the predetermined step size, the third voltage value is The second voltage value decreases the voltage value obtained after the predetermined step size.
可选地,所述获取所述调制器的第一反馈光信号的第一平均光功率,包括:Optionally, the acquiring the first average optical power of the first feedback optical signal of the modulator includes:
接收来自所述调制器的输出光信号;Receiving an output optical signal from the modulator;
将所述输出光信号分为用于所述调制器输出的第一输出光信号,以及所述第一反馈光信号;Dividing the output optical signal into a first output optical signal for the modulator output, and the first feedback optical signal;
对所述第一反馈光信号进行光电转换,得到与所述第一反馈光信号对应的电信号;Performing photoelectric conversion on the first feedback optical signal to obtain an electrical signal corresponding to the first feedback optical signal;
根据所述电信号得到所述第一平均光功率。The first average optical power is obtained from the electrical signal.
可选地,所述调制器偏置点电压的控制方法,还包括:Optionally, the method for controlling the voltage of the modulator bias point further includes:
存储所述满足预设条件的电压值。The voltage value that satisfies the preset condition is stored.
根据本发明的另一实施例,提供了一种调制器偏置点电压的控制装置,包括:第一获取模块,设置为获取预先设置的偏置点的第一电压值,并将所述第一电压值发送至调制器;According to another embodiment of the present invention, there is provided a control device for a modulator bias point voltage, comprising: a first acquisition module configured to acquire a first voltage value of a preset bias point, and to a voltage value is sent to the modulator;
第二获取模块,设置为获取所述调制器的第一反馈光信号的第一平均光功率,所述第一反馈光信号对应于所述第一电压值;
a second acquiring module, configured to acquire a first average optical power of the first feedback optical signal of the modulator, where the first feedback optical signal corresponds to the first voltage value;
处理模块,设置为重复执行以下操作,直到得到满足预设条件的电压值:以预定的步长将所述偏置点的所述第一电压值调整为第二电压值,并将所述第二电压值发送至所述调制器;获取所述调制器的第二反馈光信号的第二平均光功率,所述第二反馈光信号对应于所述第二电压值;若所述第二平均光功率与所述第一平均光功率的差值小于预设门限,则将所述第二电压值作为所述满足预设条件的电压值;a processing module configured to repeatedly perform the following operations until a voltage value that satisfies a preset condition is obtained: the first voltage value of the bias point is adjusted to a second voltage value in a predetermined step size, and the Transmitting a voltage value to the modulator; acquiring a second average optical power of the second feedback optical signal of the modulator, the second feedback optical signal corresponding to the second voltage value; if the second average And the difference between the optical power and the first average optical power is less than a preset threshold, and the second voltage value is used as the voltage value that meets the preset condition;
控制模块,设置为将所述满足预设条件的电压值发送至所述调制器,以控制所述偏置点的电压。And a control module configured to send the voltage value satisfying the preset condition to the modulator to control a voltage of the bias point.
可选地,所述处理模块,还设置为若所述第二平均光功率与所述第一平均光功率的差值不小于所述预设门限,则以所述预定的步长将所述第二电压值调整为第三电压值,并将所述第三电压值发送至所述调制器,获取所述调制器的第三反馈光信号的第三平均光功率,所述第三反馈光信号对应于所述第三电压值。Optionally, the processing module is further configured to: if the difference between the second average optical power and the first average optical power is not less than the preset threshold, The second voltage value is adjusted to a third voltage value, and the third voltage value is sent to the modulator to acquire a third average optical power of the third feedback optical signal of the modulator, the third feedback light The signal corresponds to the third voltage value.
可选地,若所述第二电压值为将所述第一电压值增大所述预定的步长后所得的电压值,则所述第三电压值为将所述第二电压值增大所述预定的步长后所得的电压值;若所述第二电压值为将所述第一电压值减小所述预定的步长后所得的电压值,则所述第三电压值为将所述第二电压值减小所述预定的步长后所得的电压值。Optionally, if the second voltage value is a voltage value obtained by increasing the first voltage value by the predetermined step, the third voltage value increases the second voltage value. a voltage value obtained after the predetermined step size; if the second voltage value is a voltage value obtained by decreasing the first voltage value by the predetermined step size, the third voltage value is The second voltage value decreases the voltage value obtained after the predetermined step size.
可选地,所述第二获取模块包括:Optionally, the second obtaining module includes:
接收单元,设置为接收来自所述调制器的输出光信号;a receiving unit configured to receive an output optical signal from the modulator;
光耦合单元,设置为将所述输出光信号分为用于所述调制器输出的第一输出光信号,以及所述第一反馈光信号;An optical coupling unit configured to divide the output optical signal into a first output optical signal for the modulator output, and the first feedback optical signal;
光电转换单元,设置为对所述第一反馈光信号进行光电转换,得到与所述第一反馈光信号对应的电信号;The photoelectric conversion unit is configured to perform photoelectric conversion on the first feedback optical signal to obtain an electrical signal corresponding to the first feedback optical signal;
光功率探测单元,设置为根据所述电信号得到所述第一平均光功率。The optical power detecting unit is configured to obtain the first average optical power according to the electrical signal.
可选地,所述调制器偏置点电压的控制装置还包括:Optionally, the control device for the modulator bias point voltage further includes:
存储单元,设置为存储所述满足预设条件的电压值。a storage unit configured to store the voltage value that satisfies a preset condition.
通过本发明实施例,采用获取预先设置的偏置点的第一电压值,并将所述第一电压值发送至调制器,获取所述调制器的与第一电压值对应的第一反馈光信号的第一平均光功率后,重复执行以下操作,直到得到满足预设条件的电压值:以预定的步长将所述偏置点的所述第一电压值调整为第二电压值,并将所述第二电压值发送至所述调制器;获取所述调制器的第二反馈光信号的第二平均光功率,所述第二反馈光信号对应于所述第二电压值;若所述第二平均光功率与所述第一平均光功率的差值小于预设
门限,则将所述第二电压值作为所述满足预设条件的电压值,进而,将所述满足预设条件的电压值发送至所述调制器,以控制所述偏置点的电压的技术方案,解决了相关技术中调制器需要多个导频信号,使得控制环路复杂的问题,进而达到了成本低廉、控制环路简单且稳定性较高的效果。According to the embodiment of the present invention, the first voltage value of the preset bias point is obtained, and the first voltage value is sent to the modulator, and the first feedback light corresponding to the first voltage value of the modulator is acquired. After the first average optical power of the signal, the following operations are repeatedly performed until a voltage value that satisfies a preset condition is obtained: the first voltage value of the bias point is adjusted to a second voltage value in a predetermined step size, and Transmitting the second voltage value to the modulator; acquiring a second average optical power of the second feedback optical signal of the modulator, the second feedback optical signal corresponding to the second voltage value; The difference between the second average optical power and the first average optical power is less than a preset
a threshold, the second voltage value is used as the voltage value satisfying the preset condition, and further, the voltage value satisfying the preset condition is sent to the modulator to control the voltage of the bias point The technical solution solves the problem that the modulator needs a plurality of pilot signals in the related art, which makes the control loop complicated, thereby achieving the effects of low cost, simple control loop and high stability.
此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:
图1是根据本发明实施例的调制器偏置点电压的控制方法的流程图;1 is a flow chart of a method of controlling a modulator bias point voltage according to an embodiment of the present invention;
图2是根据本发明实施例的调制器偏置点电压的控制装置的结构框图;2 is a block diagram showing the structure of a control device for a modulator bias point voltage according to an embodiment of the present invention;
图3是根据本发明实施例的另一调制器偏置点电压的控制装置的结构框图;3 is a block diagram showing the structure of a control device for another modulator bias point voltage according to an embodiment of the present invention;
图4是根据本发明实施例的另一调制器偏置点电压的控制装置的结构示意图;4 is a schematic structural diagram of another apparatus for controlling a bias point voltage of a modulator according to an embodiment of the present invention;
图5是根据本发明优选实施例的调制器偏置点电压的控制装置的硬件结构示意图;5 is a schematic diagram showing the hardware structure of a control device for a modulator bias point voltage according to a preferred embodiment of the present invention;
图6a是根据本发明实施的调制器偏置点电压的控制方法流程示意图;6a is a schematic flow chart of a method for controlling a bias point voltage of a modulator according to an embodiment of the present invention;
图6b是根据本发明实施的调制器偏置点电压的控制方法的另一流程示意图。6b is another flow diagram of a method of controlling a modulator bias point voltage in accordance with an implementation of the present invention.
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
在本实施例中提供了一种调制器偏置点电压的控制方法,图1是根据本发明实施例的调制器偏置点电压的控制方法的流程图,如图1所示,该流程包括如下步骤:In the embodiment, a method for controlling a modulator bias point voltage is provided. FIG. 1 is a flowchart of a method for controlling a modulator bias point voltage according to an embodiment of the present invention. As shown in FIG. 1, the process includes The following steps:
步骤S102,获取预先设置的偏置点的第一电压值,并将第一电压值发送至调制器;Step S102, acquiring a first voltage value of a preset bias point, and transmitting the first voltage value to the modulator;
步骤S104,获取调制器的第一反馈光信号的第一平均光功率,第一反馈光信号对应于第一电压值;Step S104, acquiring a first average optical power of the first feedback optical signal of the modulator, where the first feedback optical signal corresponds to the first voltage value;
步骤S106,重复执行以下操作,直到得到满足预设条件的电压值:以预定的步长将偏置点的第一电压值调整为第二电压值,并将第二电压值发送至调制器;获取调制
器的第二反馈光信号的第二平均光功率,第二反馈光信号对应于第二电压值;若第二平均光功率与第一平均光功率的差值小于预设门限,则将第二电压值作为满足预设条件的电压值;Step S106, repeating the following operations until a voltage value that satisfies the preset condition is obtained: the first voltage value of the bias point is adjusted to the second voltage value in a predetermined step size, and the second voltage value is sent to the modulator; Acquisition modulation
The second average optical power of the second feedback optical signal, the second feedback optical signal corresponds to the second voltage value; if the difference between the second average optical power and the first average optical power is less than a preset threshold, the second The voltage value is a voltage value that satisfies a preset condition;
步骤S108,将满足预设条件的电压值发送至调制器,以控制偏置点的电压。Step S108, transmitting a voltage value satisfying the preset condition to the modulator to control the voltage of the bias point.
通过上述步骤,通过根据第一平均光功率与第一平均光功率的差值判断是否调节输入至调制器的电压值的大小,相对于相关技术中,需要在调制信号中加入多种频率的导频信号,使得控制环路复杂的问题,通过一种无需外加任何导频信号的方式,不仅解决了相关技术中调制器需要多个导频信号,使得控制环路复杂的问题,达到了成本低廉、控制环路简单且稳定性较高的效果,也能够实现偏置点电压的控制。Through the above steps, by determining whether to adjust the magnitude of the voltage value input to the modulator according to the difference between the first average optical power and the first average optical power, it is necessary to add a plurality of frequencies to the modulated signal in relation to the related art. The frequency signal makes the control loop complicated, and the method that the modulator does not need to add any pilot signal does not only solve the problem that the modulator needs multiple pilot signals in the related art, and the control loop is complicated, and the cost is low. The control loop is simple and has a high stability effect, and the bias point voltage can also be controlled.
可选地,若第二平均光功率与第一平均光功率的差值不小于预设门限,则以预定的步长将第二电压值调整为第三电压值,并将第三电压值发送至调制器,获取调制器的第三反馈光信号的第三平均光功率,第三反馈光信号对应于第三电压值。即在第二平均光功率与第一平均光功率的差值不小于预设门限的情况下,继续调整电压值,从而快速有效地确定最佳偏置点的电压。Optionally, if the difference between the second average optical power and the first average optical power is not less than a preset threshold, the second voltage value is adjusted to a third voltage value in a predetermined step size, and the third voltage value is sent To the modulator, a third average optical power of the third feedback optical signal of the modulator is obtained, and the third feedback optical signal corresponds to the third voltage value. That is, if the difference between the second average optical power and the first average optical power is not less than the preset threshold, the voltage value is continuously adjusted to quickly and efficiently determine the voltage of the optimal bias point.
可选地,若第二电压值为将第一电压值增大预定的步长后所得的电压值,则第三电压值为将第二电压值增大预定的步长后所得的电压值;若第二电压值为将第一电压值减小预定的步长后所得的电压值,则第三电压值为将第二电压值减小预定的步长后所得的电压值。即在第二平均光功率与第一平均光功率的差值不小于预设门限的情况下,可以以相同的步长调整电压值,从而快速有效地确定最佳偏置点的电压。Optionally, if the second voltage value is a voltage value obtained by increasing the first voltage value by a predetermined step, the third voltage value is a voltage value obtained by increasing the second voltage value by a predetermined step size; If the second voltage value is a voltage value obtained by decreasing the first voltage value by a predetermined step, the third voltage value is a voltage value obtained by decreasing the second voltage value by a predetermined step. That is, in the case where the difference between the second average optical power and the first average optical power is not less than the preset threshold, the voltage value can be adjusted in the same step size, thereby quickly and efficiently determining the voltage of the optimal bias point.
可选地,获取调制器的第一反馈光信号的第一平均光功率,包括:接收来自调制器的输出光信号;将输出光信号分为用于调制器输出的第一输出光信号,以及第一反馈光信号;对第一反馈光信号进行光电转换,得到与第一反馈光信号对应的电信号;根据电信号得到第一平均光功率。即通过光电转换实现平均光功率的检测。Optionally, acquiring the first average optical power of the first feedback optical signal of the modulator comprises: receiving an output optical signal from the modulator; dividing the output optical signal into a first output optical signal for the modulator output, and a first feedback optical signal; photoelectrically converting the first feedback optical signal to obtain an electrical signal corresponding to the first feedback optical signal; and obtaining a first average optical power according to the electrical signal. That is, the detection of the average optical power is realized by photoelectric conversion.
可选地,本发明实施例的调制器偏置点电压的控制方法还包括:存储满足预设条件的电压值。即将电压值存入ROM中,待下次上电直接调取使用。Optionally, the method for controlling the modulator bias point voltage of the embodiment of the present invention further includes: storing a voltage value that meets a preset condition. The voltage value is stored in the ROM and will be used directly after power-on.
通过本发明实施例,采用获取预先设置的偏置点的第一电压值,并将第一电压值发送至调制器,获取调制器的与第一电压值对应的第一反馈光信号的第一平均光功率后,重复执行以下操作,直到得到满足预设条件的电压值:以预定的步长将偏置点的第一电压值调整为第二电压值,并将第二电压值发送至调制器;获取调制器的第二反馈光信号的第二平均光功率,第二反馈光信号对应于第二电压值;若第二平均光功率与第一平均光功率的差值小于预设门限,则将第二电压值作为满足预设条件的电压值,进而,将满足预设条件的电压值发送至调制器,以控制偏置点的电压的技术方案,解
决了相关技术中调制器需要多个导频信号,使得控制环路复杂的问题,进而达到了成本低廉、控制环路简单且稳定性较高的效果。According to the embodiment of the present invention, the first voltage value of the preset bias point is obtained, and the first voltage value is sent to the modulator to obtain the first of the first feedback optical signal of the modulator corresponding to the first voltage value. After the average optical power, the following operations are repeatedly performed until a voltage value that satisfies the preset condition is obtained: the first voltage value of the bias point is adjusted to the second voltage value in a predetermined step size, and the second voltage value is sent to the modulation Obtaining a second average optical power of the second feedback optical signal of the modulator, where the second feedback optical signal corresponds to the second voltage value; if the difference between the second average optical power and the first average optical power is less than a preset threshold, Then, the second voltage value is used as a voltage value that satisfies a preset condition, and further, a voltage solution that satisfies the preset condition is sent to the modulator to control the voltage of the bias point.
In the related art, the modulator needs a plurality of pilot signals, which makes the control loop complicated, thereby achieving the effects of low cost, simple control loop and high stability.
在本实施例中还提供了一种调制器偏置点电压的控制装置,该装置设置为实现上述实施例及优选实施方式,已经进行过说明的不再赘述。如以下所使用的,术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现,但是硬件,或者软件和硬件的组合的实现也是可能并被构想的。In the embodiment, a control device for the bias point voltage of the modulator is also provided, and the device is configured to implement the above-mentioned embodiments and preferred embodiments, and the description thereof has been omitted. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
图2是根据本发明实施例的调制器偏置点电压的控制装置的结构框图,如图2所示,该装置包括:2 is a structural block diagram of a control device for a modulator bias point voltage according to an embodiment of the present invention. As shown in FIG. 2, the device includes:
第一获取模块202,设置为获取预先设置的偏置点的第一电压值,并将第一电压值发送至调制器;The first obtaining module 202 is configured to acquire a first voltage value of a preset bias point, and send the first voltage value to the modulator;
第二获取模块204,设置为获取调制器的第一反馈光信号的第一平均光功率,第一反馈光信号对应于第一电压值;The second obtaining module 204 is configured to obtain a first average optical power of the first feedback optical signal of the modulator, where the first feedback optical signal corresponds to the first voltage value;
处理模块206,设置为重复执行以下操作,直到得到满足预设条件的电压值:以预定的步长将偏置点的第一电压值调整为第二电压值,并将第二电压值发送至调制器;获取调制器的第二反馈光信号的第二平均光功率,第二反馈光信号对应于第二电压值;若第二平均光功率与第一平均光功率的差值小于预设门限,则将第二电压值作为满足预设条件的电压值;The processing module 206 is configured to repeatedly perform the following operations until a voltage value that satisfies the preset condition is obtained: the first voltage value of the bias point is adjusted to the second voltage value in a predetermined step size, and the second voltage value is sent to a modulator; obtaining a second average optical power of the second feedback optical signal of the modulator, the second feedback optical signal corresponding to the second voltage value; if the difference between the second average optical power and the first average optical power is less than a preset threshold And using the second voltage value as a voltage value that satisfies a preset condition;
控制模块208,设置为将满足预设条件的电压值发送至调制器,以控制偏置点的电压。The control module 208 is configured to send a voltage value that satisfies the preset condition to the modulator to control the voltage of the bias point.
可选地,处理模块206,还设置为若第二平均光功率与第一平均光功率的差值不小于预设门限,则以预定的步长将第二电压值调整为第三电压值,并将第三电压值发送至调制器,获取调制器的第三反馈光信号的第三平均光功率,第三反馈光信号对应于第三电压值。Optionally, the processing module 206 is further configured to adjust the second voltage value to a third voltage value by a predetermined step if the difference between the second average optical power and the first average optical power is not less than a preset threshold. And transmitting a third voltage value to the modulator to obtain a third average optical power of the third feedback optical signal of the modulator, the third feedback optical signal corresponding to the third voltage value.
可选地,若第二电压值为将第一电压值增大预定的步长后所得的电压值,则第三电压值为将第二电压值增大预定的步长后所得的电压值;若第二电压值为将第一电压值减小预定的步长后所得的电压值,则第三电压值为将第二电压值减小预定的步长后所得的电压值。Optionally, if the second voltage value is a voltage value obtained by increasing the first voltage value by a predetermined step, the third voltage value is a voltage value obtained by increasing the second voltage value by a predetermined step size; If the second voltage value is a voltage value obtained by decreasing the first voltage value by a predetermined step, the third voltage value is a voltage value obtained by decreasing the second voltage value by a predetermined step.
可选地,如图3所示,第二获取模块204包括:Optionally, as shown in FIG. 3, the second obtaining module 204 includes:
接收单元302,设置为接收来自调制器的输出光信号;The receiving unit 302 is configured to receive an output optical signal from the modulator;
光耦合单元304,设置为将输出光信号分为用于调制器输出的第一输出光信号,
以及第一反馈光信号;The optical coupling unit 304 is configured to divide the output optical signal into a first output optical signal for the modulator output,
And a first feedback optical signal;
光电转换单元306,设置为对第一反馈光信号进行光电转换,得到与第一反馈光信号对应的电信号;The photoelectric conversion unit 306 is configured to perform photoelectric conversion on the first feedback optical signal to obtain an electrical signal corresponding to the first feedback optical signal;
光功率探测单元308,设置为根据电信号得到第一平均光功率。The optical power detecting unit 308 is configured to obtain a first average optical power according to the electrical signal.
可选地,图4是根据本发明实施例的另一调制器偏置点电压的控制装置的结构示意图,如图4所示,本发明实施例的调制器偏置点电压的控制装置,还包括:Optionally, FIG. 4 is a schematic structural diagram of another apparatus for controlling a bias point voltage of a modulator according to an embodiment of the present invention. As shown in FIG. 4, a device for controlling a bias point voltage of a modulator according to an embodiment of the present invention is further provided. include:
存储单元402,设置为存储满足预设条件的电压值。The storage unit 402 is configured to store a voltage value that satisfies a preset condition.
通过本发明实施例,采用获取预先设置的偏置点的第一电压值,并将第一电压值发送至调制器,获取调制器的与第一电压值对应的第一反馈光信号的第一平均光功率后,重复执行以下操作,直到得到满足预设条件的电压值:以预定的步长将偏置点的第一电压值调整为第二电压值,并将第二电压值发送至调制器;获取调制器的第二反馈光信号的第二平均光功率,第二反馈光信号对应于第二电压值;若第二平均光功率与第一平均光功率的差值小于预设门限,则将第二电压值作为满足预设条件的电压值,进而,将满足预设条件的电压值发送至调制器,以控制偏置点的电压的技术方案,解决了相关技术中调制器需要多个导频信号,使得控制环路复杂的问题,进而达到了成本低廉、控制环路简单且稳定性较高的效果。According to the embodiment of the present invention, the first voltage value of the preset bias point is obtained, and the first voltage value is sent to the modulator to obtain the first of the first feedback optical signal of the modulator corresponding to the first voltage value. After the average optical power, the following operations are repeatedly performed until a voltage value that satisfies the preset condition is obtained: the first voltage value of the bias point is adjusted to the second voltage value in a predetermined step size, and the second voltage value is sent to the modulation Obtaining a second average optical power of the second feedback optical signal of the modulator, where the second feedback optical signal corresponds to the second voltage value; if the difference between the second average optical power and the first average optical power is less than a preset threshold, Then, the second voltage value is used as a voltage value that satisfies a preset condition, and further, a voltage solution that satisfies a preset condition is sent to the modulator to control the voltage of the bias point, and the modulator needs to be solved in the related art. The pilot signals make the control loop complicated, and thus achieve the effects of low cost, simple control loop and high stability.
本发明实施例所要解决的技术问题是:提供一种成本低廉,易于实现,控制环路简单且高稳定性的16QAM***调制器的偏置点的控制方法和装置,使得16QAM***调制器的偏置点相对稳定,控制简单,从而提高***的稳定性。The technical problem to be solved by the embodiments of the present invention is to provide a control method and device for a bias point of a 16QAM system modulator that is low in cost, easy to implement, simple in control loop, and high in stability, so that the bias of the 16QAM system modulator is The set point is relatively stable and the control is simple, thereby improving the stability of the system.
本发明实施例还提供了一种16QAM调制***中的调制器偏置点的控制方法,包括以下步骤:The embodiment of the invention further provides a method for controlling a modulator bias point in a 16QAM modulation system, comprising the following steps:
通过检测光电二极管(photo diode,简称为PD)最小值来控制同相正交(In-phase/Quadrature,简称为I/Q)偏置到正确位置,通过检测PIN(PIN(positive-Intrinsic-negative)型二极管)最小值来控制相位偏置到正确位置。Control the in-phase quadrature (In/phase/Quadrature, I/Q) offset to the correct position by detecting the minimum value of the photo diode (PD), and detect the PIN (PIN (positive-Intrinsic-negative) Type diode) minimum to control phase offset to the correct position.
本发明实施例提供了一种16QAM调制***中的调制器偏置点的控制装置,该装置可以包括以下组成部分:Embodiments of the present invention provide a control device for a modulator bias point in a 16QAM modulation system, which may include the following components:
光耦合器(coupler):95/5,其中,输出光95%,反馈光5%。Photocoupler (coupler): 95/5, where the output light is 95% and the feedback light is 5%.
PIN管:带宽10G,在反馈环路中实现光电转换。PIN tube: Bandwidth 10G, photoelectric conversion in the feedback loop.
射频功率探测器(Radio Frequency Power Detector,简称为RFPD):均方根值-直流电(Root Meam Square-Direct Current直流电,简称为RMS-DC)芯片,主要作用是
把信号的有效值转为直流输出。Radio Frequency Power Detector (RFPD): Root Meam Square-Direct Current (RMS-DC) chip, the main function is
Convert the rms value of the signal to a dc output.
模数转换器(Analog-to-Digital Converter,简称为ADC):反馈光路的模拟量转换为数字量。Analog-to-Digital Converter (ADC): The analog quantity of the feedback optical path is converted into digital quantity.
数模转换器(Digital-to-Analog Converter,简称为DAC):数字算法单元输出的数字量转换为模拟信号。Digital-to-Analog Converter (DAC): The digital quantity output by the digital algorithm unit is converted into an analog signal.
微控制单元/数字信号处理(Micro Control Unit/digital signal processing,简称为MCU/DSP),设置为反馈控制算法的实施。Micro Control Unit/digital signal processing (MCU/DSP) is set as the implementation of the feedback control algorithm.
本发明实施例提供的是一种基于数字处理的低成本16QAM调制器偏置点控制的方案,其具有以下有益的效果:Embodiments of the present invention provide a low-cost 16QAM modulator bias point control scheme based on digital processing, which has the following beneficial effects:
本发明实施例的16QAM调制器偏置点控制的方法,采用平均功率检测和数字化处理的方式,可以实现16QAM调制器偏置点的相对稳定。与其他***的控制方法相比,本发明不需要外加任何导频信号,结构简单易实现,具有高精度、高可靠性、高响应度以及控制环路灵活简单等优点,达到了16QAM调制器偏置点控制更加方便,利于调试的效果。In the 16QAM modulator bias point control method of the embodiment of the present invention, the average power detection and digitization processing manner can achieve relatively stable bias point of the 16QAM modulator. Compared with other system control methods, the present invention does not require any additional pilot signals, has a simple and easy to implement structure, has the advantages of high precision, high reliability, high responsivity, and flexible and simple control loop, and achieves a bias of 16QAM modulator. Point control is more convenient and facilitates debugging.
这种新的16QAM调制器的***包括光耦合器,PIN管,射频功率探测器,模数转换器,数模转换器和数字算法处理单元模块,能够快速、稳定、准确的实现对16QAM调制器的偏置点的锁定,同时不受限于调制器内置PD带宽,对超100G密集波分***的传输具有重要的意义。The new 16QAM modulator system includes optocoupler, PIN tube, RF power detector, analog-to-digital converter, digital-to-analog converter and digital algorithm processing unit module to enable fast, stable and accurate implementation of 16QAM modulators. The locking of the bias point is not limited to the built-in PD bandwidth of the modulator, which is of great significance for the transmission of the ultra-100G dense wavelength division system.
为了实现上述的控制技术方案,本发明实施例给出如下的一种优选实施方案,如图5所示。首先,从激光器发出的光信号经过一个偏振分束器(polarization beam splitter,简称为PBS)分为EV和EH,EV和EH分别经过第一3dB耦合器和第二3dB耦合器分别分为I光和Q光,其中,EV的I光经过由DAC_V控制第一驱动器调制的第一干涉型(Mach-Zehnder,简称为MZ)调制器成为IV光;EV的Q光经过由DAC_V控制第一驱动器调制的第二MZ调制器和第一90度相位延迟单元后成为QV光;EH的I光经过由DAC_H控制第二驱动器调制的第三MZ调制器成为IH光;EH的Q光经过由DAC_H控制第二驱动器调制的第四MZ调制器和第二90度相位延迟单元后成为QH光;其次,IV光和QV光,IH光和QH光分别由第三3dB耦合器耦合和第四3dB耦合器合成后,经过第二偏振分束器PBC合成一束光,经过5:95的耦合器分为输出光E1OUT和反馈光;分别利用两个高精度的ADC,将两个内置PD分别探测的V路和H路光,采集到数字信号处理芯片(Digital Signal Processing,简称DSP),DSP调整偏置点反馈控制信号分别经DAC转换为模拟电压信号分别控制第一MZ调制器,第二MZ调制器,第三MZ调制器和第四MZ调制器的偏置点,使得最终检测到得平
均功率最小。最终,即可实现获得16QAM调制器的IQ偏置点的正确偏置。In order to achieve the above control technical solution, an embodiment of the present invention provides a preferred embodiment as shown in FIG. 5. First, the optical signal emitted from the laser is divided into EV and EH through a polarization beam splitter (PBS). The EV and EH are respectively divided into I light by the first 3dB coupler and the second 3dB coupler. And Q light, wherein the I light of the EV is converted into IV light by a first interference type (Mach-Zehnder, abbreviated as MZ) modulator modulated by the first driver controlled by the DAC_V; the Q light of the EV is modulated by the first driver controlled by the DAC_V The second MZ modulator and the first 90 degree phase delay unit become QV light; the I light of EH passes through the third MZ modulator modulated by the second driver controlled by DAC_H to become IH light; the Q light of EH is controlled by DAC_H The second driver modulated fourth MZ modulator and the second 90 degree phase delay unit become QH light; secondly, IV light and QV light, IH light and QH light are respectively synthesized by a third 3dB coupler coupling and a fourth 3dB coupler After that, a beam of light is synthesized by the second polarization beam splitter PBC, and is divided into output light E 1 OUT and feedback light through a 5:95 coupler; respectively, using two high-precision ADCs to separately detect the two built-in PDs. V-channel and H-channel light, digital signal processing chip (Digital Sig) Nal Processing (DSP for short), the DSP adjusts the bias point feedback control signal to be converted into an analog voltage signal by the DAC, respectively, to control the first MZ modulator, the second MZ modulator, the third MZ modulator and the fourth MZ modulator. Set the point so that the average power finally detected is minimized. Ultimately, the correct biasing of the IQ bias point of the 16QAM modulator can be achieved.
输出光经过一个5/95耦合器分为输出光和反馈光,其中95%输出光用于最终16QAM调制输出,而5%输出光经10G PIN管进行光电转换,然后利用RFPD把信号的有效值转为直流输出,高精度ADC将该功率采集到数字信号处理芯片DSP,DSP调整偏置点反馈控制信号经DAC转换为模拟电压信号控制16QAM调制器的偏置点,使得最终检测到得平均功率最小,即可实现获得16QAM调制器的相位偏置点的正确偏置。The output light is divided into output light and feedback light through a 5/95 coupler, 95% of which is used for the final 16QAM modulated output, and 5% of the output light is photoelectrically converted by the 10G PIN tube, and then the effective value of the signal is measured by RFPD. Converted to DC output, the high-precision ADC collects the power into the digital signal processing chip DSP, and the DSP adjusts the bias point feedback control signal to be converted into an analog voltage signal by the DAC to control the bias point of the 16QAM modulator, so that the average power is finally detected. The smallest, that is, the correct offset of the phase bias point of the 16QAM modulator can be achieved.
本发明实施例在DSP内实现16QAM调制器的偏置点电压控制的数字算法流程图,如图6a和图6b所示:A digital algorithm flow chart for implementing bias point voltage control of a 16QAM modulator in a DSP according to an embodiment of the present invention is shown in FIG. 6a and FIG. 6b:
一、初次上电First, power on for the first time
1、初始化16QAM调制器的偏置点:DSP下发一个偏置点中值数值(一般为3.5V),通过DAC分别下发到I路和Q路,用ADC采集PD探测到的输出光信号,DSP读取ADC数据,作为初始平均光功率值。1. Initialize the bias point of the 16QAM modulator: The DSP sends a midpoint value of the bias point (usually 3.5V), which is sent to the I and Q channels respectively through the DAC, and the output optical signal detected by the PD is collected by the ADC. The DSP reads the ADC data as the initial average optical power value.
2、按0.05V的步长(根据实际偏置精度和调制速率要求可有不同设定)增大/减小偏置点的电压值,通过DSP再次下发,读取此时ADC数值作为新的平均光功率值。2, according to the step size of 0.05V (according to the actual offset accuracy and modulation rate requirements can have different settings) increase / decrease the voltage value of the bias point, send again through the DSP, read the ADC value as new Average optical power value.
3、DSP比较此时新的平均光功率值与初始平均光功率值的大小。如果新值小于初始值,把新的平均光功率值作为初始平均光功率值,继续增大/减小偏置点的电压值,重复步骤2;如果新的值大于初始值,则保持初始平均光功率值不变,减小/增大偏置点的电压值,读取ADC数值作为新的平均光功率值。3. The DSP compares the new average optical power value with the initial average optical power value. If the new value is less than the initial value, the new average optical power value is taken as the initial average optical power value, and the voltage value of the bias point is continuously increased/decreased, and step 2 is repeated; if the new value is greater than the initial value, the initial average is maintained. The optical power value is unchanged, the voltage value of the bias point is decreased/increased, and the ADC value is read as a new average optical power value.
4、重复步骤3,使得新的平均光功率值减去初始光功率值小于某一特定小量(用电压值表示,一般认为小于0.001V),则此时的偏置点就是最佳偏置点。将此事偏置点存入DSP的ROM中,待下次上电时直接调取使用。4. Repeat step 3 so that the new average optical power value minus the initial optical power value is less than a certain small amount (represented by the voltage value, generally considered to be less than 0.001V), then the bias point at this time is the optimal bias. point. Store the offset point in the ROM of the DSP and use it directly after power-on.
5、重复步骤3,跟随偏置点的变化,以便保证实时的偏置点在合适的位置。5. Repeat step 3 to follow the change in the bias point to ensure that the real-time bias point is in the proper position.
二、再次上电Second, power on again
1、调取DSP的ROM中上次保存的偏置点数值,下发。1. Retrieve the value of the last saved offset point in the ROM of the DSP and send it.
2、重复初次上电的步骤2和步骤3,保持跟随最佳偏置点。2. Repeat steps 2 and 3 for the initial power-on and keep following the optimal bias point.
在本发明实施例中,16QAM信号幅度的关系:相对于DAC输出,I/Q路分别有两个电压幅度,令其高电压VHI,VHQ,低电压VLI,VLQ。在理想情况下:
In the embodiment of the present invention, the relationship of the amplitude of the 16QAM signal: relative to the DAC output, the I/Q path has two voltage amplitudes respectively, such that the high voltages V HI , V HQ , the low voltages V LI , V LQ . In an ideal situation:
I/Q偏置点自动控制:对于I路信号,其中,
分别表示星座图中第一层和第二层星座点的相位,Vπ是指调制器相位变化π所需要的电压。I/Q bias point automatic control: For I signal, among them, Representing the phase of the first layer and the second layer constellation point in the constellation diagram, respectively, V π is the voltage required for the modulator phase change π.
利用调制器自带的PD检测光功率,可得I路平均光功率为:Using the PD of the modulator to detect the optical power, the average optical power of the I channel is:
其中,为偏置点相位,统计结果显示,每个信号出现的概率是相同的,所以利用公式(2)求光功率是合理的。among them, For the bias point phase, The statistical results show that the probability of occurrence of each signal is the same, so it is reasonable to use the formula (2) to find the optical power.
结合公式(1)可知,则所以,偏置点在最低点处,平均光功率有最小值;那么通过反馈,使得平均输出光功率最小可以得到最佳偏置点,即偏置点最低点。同理,Q路偏置点一样。Combined with formula (1), then and so, At the lowest point of the bias point, the average optical power has a minimum value; then, by feedback, the average output optical power is minimized to obtain the optimal bias point, that is, the lowest point of the bias point. Similarly, the Q way bias point is the same.
所以,PD检测光功率最小时得到最佳IQ偏置点。Therefore, the best IQ bias point is obtained when the PD detects the optical power to a minimum.
相位控制:由式(1),对于理想的输入信号偏置点在最低点:Phase control: By equation (1), the bias point for the ideal input signal is at the lowest point:
其中,在I/Q两路信号相同时取+,相反时取-,VI表示I路的电压,VbI表示I路的偏置电压,VQ表示Q路的电压,VbQ表示Q路的偏置电压,表示I,Q之间的相位差。Wherein, when the I/Q signals are the same, take +, if not, take -, V I denotes the voltage of I, V bI denotes the bias voltage of I, V Q denotes the voltage of Q, and V bQ denotes Q Bias voltage, Indicates the phase difference between I and Q.
对于输出的V,H两路16QAM调试信号,因此检测到的RF信号有效功率正比于:For the output V, H two 16QAM debug signals, so the detected RF signal effective power is proportional to:
其中,和分别表示V和H偏振态的相位工作点。among them, with The phase operating points of the V and H polarization states, respectively.
因此,如果将调制器输出光信号用PIN管进行检测,将获得一个幅度与成正比的,速率为调制信号速率的不归零码(Non-Return to Zero,简称为NRZ)信号。
检测该信号一定带宽内的功率,并通过改变相位偏置点的位置,使之最小,则可实现相位偏置点的控制。Therefore, if the modulator output optical signal is detected with a PIN tube, an amplitude and In proportion, the rate is a non-return to zero (NRZ) signal of the modulation signal rate. The power of a certain bandwidth of the signal is detected, and by changing the position of the phase offset point to minimize it, the phase bias point can be controlled.
显然,本领域的技术人员应该明白,上述的本发明的各模块或各步骤可以用通用的计算装置来实现,它们可以集中在单个的计算装置上,或者分布在多个计算装置所组成的网络上,可选地,它们可以用计算装置可执行的程序代码来实现,从而,可以将它们存储在存储装置中由计算装置来执行,并且在某些情况下,可以以不同于此处的顺序执行所示出或描述的步骤,或者将它们分别制作成各个集成电路模块,或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样,本发明不限制于任何特定的硬件和软件结合。It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.
如上所述,本发明实施例提供的一种调制器偏置点电压的控制方法及装置,具有以下有益效果:解决了相关技术中调制器需要多个导频信号,使得控制环路复杂的问题,进而达到了成本低廉、控制环路简单且稳定性较高的效果。
As described above, the method and apparatus for controlling the bias point voltage of a modulator provided by the embodiments of the present invention have the following beneficial effects: solving the problem that the modulator needs multiple pilot signals in the related art, and the control loop is complicated. In turn, the effect of low cost, simple control loop and high stability is achieved.
Claims (10)
- 一种调制器偏置点电压的控制方法,包括:A method for controlling a bias point voltage of a modulator, comprising:获取预先设置的偏置点的第一电压值,并将所述第一电压值发送至调制器;Obtaining a first voltage value of a preset bias point, and transmitting the first voltage value to a modulator;获取所述调制器的第一反馈光信号的第一平均光功率,所述第一反馈光信号对应于所述第一电压值;Obtaining a first average optical power of the first feedback optical signal of the modulator, where the first feedback optical signal corresponds to the first voltage value;重复执行以下操作,直到得到满足预设条件的电压值:以预定的步长将所述偏置点的所述第一电压值调整为第二电压值,并将所述第二电压值发送至所述调制器;获取所述调制器的第二反馈光信号的第二平均光功率,所述第二反馈光信号对应于所述第二电压值;若所述第二平均光功率与所述第一平均光功率的差值小于预设门限,则将所述第二电压值作为所述满足预设条件的电压值;Repeating the following operations until a voltage value that satisfies a preset condition is obtained: the first voltage value of the bias point is adjusted to a second voltage value in a predetermined step size, and the second voltage value is sent to a modulator; acquiring a second average optical power of the second feedback optical signal of the modulator, the second feedback optical signal corresponding to the second voltage value; if the second average optical power is The difference between the first average optical power is less than a preset threshold, and the second voltage value is used as the voltage value that meets the preset condition;将所述满足预设条件的电压值发送至所述调制器,以控制所述偏置点的电压。The voltage value that satisfies the preset condition is sent to the modulator to control the voltage of the bias point.
- 根据权利要求1所述的方法,其中,若所述第二平均光功率与所述第一平均光功率的差值不小于所述预设门限,则以所述预定的步长将所述第二电压值调整为第三电压值,并将所述第三电压值发送至所述调制器,获取所述调制器的第三反馈光信号的第三平均光功率,所述第三反馈光信号对应于所述第三电压值。The method according to claim 1, wherein if the difference between the second average optical power and the first average optical power is not less than the preset threshold, the first step is The second voltage value is adjusted to a third voltage value, and the third voltage value is sent to the modulator to obtain a third average optical power of the third feedback optical signal of the modulator, the third feedback optical signal Corresponding to the third voltage value.
- 根据权利要求2所述的方法,其中,若所述第二电压值为将所述第一电压值增大所述预定的步长后所得的电压值,则所述第三电压值为将所述第二电压值增大所述预定的步长后所得的电压值;若所述第二电压值为将所述第一电压值减小所述预定的步长后所得的电压值,则所述第三电压值为将所述第二电压值减小所述预定的步长后所得的电压值。The method according to claim 2, wherein said third voltage value is a value if said second voltage value is a voltage value obtained by increasing said first voltage value by said predetermined step size a voltage value obtained by increasing the second voltage value by the predetermined step size; if the second voltage value is a voltage value obtained by decreasing the first voltage value by the predetermined step size, The third voltage value is a voltage value obtained by decreasing the second voltage value by the predetermined step size.
- 根据权利要求1所述的方法,其中,所述获取所述调制器的第一反馈光信号的第一平均光功率,包括:The method of claim 1, wherein the obtaining the first average optical power of the first feedback optical signal of the modulator comprises:接收来自所述调制器的输出光信号;Receiving an output optical signal from the modulator;将所述输出光信号分为用于所述调制器输出的第一输出光信号,以及所述第一反馈光信号;Dividing the output optical signal into a first output optical signal for the modulator output, and the first feedback optical signal;对所述第一反馈光信号进行光电转换,得到与所述第一反馈光信号对应的电信号;Performing photoelectric conversion on the first feedback optical signal to obtain an electrical signal corresponding to the first feedback optical signal;根据所述电信号得到所述第一平均光功率。The first average optical power is obtained from the electrical signal.
- 根据权利要求1至4中任一项所述的方法,其中,还包括:The method according to any one of claims 1 to 4, further comprising:存储所述满足预设条件的电压值。 The voltage value that satisfies the preset condition is stored.
- 一种调制器偏置点电压的控制装置,包括:A control device for a bias point voltage of a modulator, comprising:第一获取模块,设置为获取预先设置的偏置点的第一电压值,并将所述第一电压值发送至调制器;a first obtaining module, configured to acquire a first voltage value of a preset bias point, and send the first voltage value to a modulator;第二获取模块,设置为获取所述调制器的第一反馈光信号的第一平均光功率,所述第一反馈光信号对应于所述第一电压值;a second acquiring module, configured to acquire a first average optical power of the first feedback optical signal of the modulator, where the first feedback optical signal corresponds to the first voltage value;处理模块,设置为重复执行以下操作,直到得到满足预设条件的电压值:以预定的步长将所述偏置点的所述第一电压值调整为第二电压值,并将所述第二电压值发送至所述调制器;获取所述调制器的第二反馈光信号的第二平均光功率,所述第二反馈光信号对应于所述第二电压值;若所述第二平均光功率与所述第一平均光功率的差值小于预设门限,则将所述第二电压值作为所述满足预设条件的电压值;a processing module configured to repeatedly perform the following operations until a voltage value that satisfies a preset condition is obtained: the first voltage value of the bias point is adjusted to a second voltage value in a predetermined step size, and the Transmitting a voltage value to the modulator; acquiring a second average optical power of the second feedback optical signal of the modulator, the second feedback optical signal corresponding to the second voltage value; if the second average And the difference between the optical power and the first average optical power is less than a preset threshold, and the second voltage value is used as the voltage value that meets the preset condition;控制模块,设置为将所述满足预设条件的电压值发送至所述调制器,以控制所述偏置点的电压。And a control module configured to send the voltage value satisfying the preset condition to the modulator to control a voltage of the bias point.
- 根据权利要求6所述的装置,其中,所述处理模块,还设置为若所述第二平均光功率与所述第一平均光功率的差值不小于所述预设门限,则以所述预定的步长将所述第二电压值调整为第三电压值,并将所述第三电压值发送至所述调制器,获取所述调制器的第三反馈光信号的第三平均光功率,所述第三反馈光信号对应于所述第三电压值。The device according to claim 6, wherein the processing module is further configured to: if the difference between the second average optical power and the first average optical power is not less than the preset threshold, Determining the second voltage value to a third voltage value and transmitting the third voltage value to the modulator to obtain a third average optical power of the third feedback optical signal of the modulator The third feedback optical signal corresponds to the third voltage value.
- 根据权利要求7所述的装置,其中,若所述第二电压值为将所述第一电压值增大所述预定的步长后所得的电压值,则所述第三电压值为将所述第二电压值增大所述预定的步长后所得的电压值;若所述第二电压值为将所述第一电压值减小所述预定的步长后所得的电压值,则所述第三电压值为将所述第二电压值减小所述预定的步长后所得的电压值。The apparatus according to claim 7, wherein if said second voltage value is a voltage value obtained by increasing said first voltage value by said predetermined step size, said third voltage value is a voltage value obtained by increasing the second voltage value by the predetermined step size; if the second voltage value is a voltage value obtained by decreasing the first voltage value by the predetermined step size, The third voltage value is a voltage value obtained by decreasing the second voltage value by the predetermined step size.
- 根据权利要求6所述的装置,其中,所述第二获取模块包括:The apparatus of claim 6, wherein the second acquisition module comprises:接收单元,设置为接收来自所述调制器的输出光信号;a receiving unit configured to receive an output optical signal from the modulator;光耦合单元,设置为将所述输出光信号分为用于所述调制器输出的第一输出光信号,以及所述第一反馈光信号;An optical coupling unit configured to divide the output optical signal into a first output optical signal for the modulator output, and the first feedback optical signal;光电转换单元,设置为对所述第一反馈光信号进行光电转换,得到与所述第一反馈光信号对应的电信号;The photoelectric conversion unit is configured to perform photoelectric conversion on the first feedback optical signal to obtain an electrical signal corresponding to the first feedback optical signal;光功率探测单元,设置为根据所述电信号得到所述第一平均光功率。 The optical power detecting unit is configured to obtain the first average optical power according to the electrical signal.
- 根据权利要求6至9中任一项所述的装置,其中,还包括:The apparatus according to any one of claims 6 to 9, further comprising:存储单元,设置为存储所述满足预设条件的电压值。 a storage unit configured to store the voltage value that satisfies a preset condition.
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