CN111106530A - Automatic emission power adjusting circuit and method for laser diode - Google Patents
Automatic emission power adjusting circuit and method for laser diode Download PDFInfo
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- CN111106530A CN111106530A CN201911242291.4A CN201911242291A CN111106530A CN 111106530 A CN111106530 A CN 111106530A CN 201911242291 A CN201911242291 A CN 201911242291A CN 111106530 A CN111106530 A CN 111106530A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/0607—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying physical parameters other than the potential of the electrodes, e.g. by an electric or magnetic field, mechanical deformation, pressure, light, temperature
- H01S5/0612—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying physical parameters other than the potential of the electrodes, e.g. by an electric or magnetic field, mechanical deformation, pressure, light, temperature controlled by temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/024—Arrangements for thermal management
- H01S5/02407—Active cooling, e.g. the laser temperature is controlled by a thermo-electric cooler or water cooling
- H01S5/02415—Active cooling, e.g. the laser temperature is controlled by a thermo-electric cooler or water cooling by using a thermo-electric cooler [TEC], e.g. Peltier element
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/024—Arrangements for thermal management
- H01S5/02453—Heating, e.g. the laser is heated for stabilisation against temperature fluctuations of the environment
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention relates to the technical field of automatic control of lasers, and provides an automatic emission power adjusting circuit of a laser diode.A light filter is arranged between the laser diode and a light power monitoring module, only light with central wavelength is reserved, and then the filtered light is converted into an electric signal by a light power detection module and is transmitted to an MCU (micro control unit). by combining the automatic emission power adjusting method of the laser diode, accurate and quick light wave detection of a light emitting component is realized; the invention provides an automatic emission power adjusting circuit and method of a laser diode, which automatically adjust the output light wavelength of the laser diode by monitoring the light power of central wavelength light in the emitted light of the laser diode in real time, so that the light emitting wavelength (emission power) is maintained in an effective range.
Description
Technical Field
The invention relates to the technical field of automatic control of lasers, in particular to an automatic adjusting circuit and method for the emitting power of a laser diode.
Background
Semiconductor lasers are also referred to as semiconductor Laser diodes, or simply Laser Diodes (LDs). Due to the material structure specificity of the semiconductor material and the particularity of the motion rule of electrons in the semiconductor material, the working characteristics of the semiconductor laser have the particularity.
Semiconductor laser is a device which uses certain semiconductor material as working substance to produce stimulated emission. The operating principle is that the population inversion of the non-equilibrium carriers is realized between the energy bands (conduction band and valence band) of the semiconductor substance or between the energy bands of the semiconductor substance and the energy levels of the impurities (acceptor or donor) by a certain excitation mode, and when a large number of electrons in the population inversion state are recombined with holes, the stimulated emission action is generated. The excitation modes of semiconductor lasers are mainly three, namely, an electro-injection mode, an optical pump mode and a high-energy electron beam excitation mode.
One of the characteristics of the laser diode is that the intensity of output light can be directly modulated from current. Because the output optical power and the input current are in linear relation, the laser diode can directly modulate the intensity of the output light by adopting analog or digital current, and an expensive modulator is omitted, so that the application of the diode is more economical and practical.
Due to the change of the temperature, a thermoelectric cooling (TEC) module in the laser is influenced, the temperature control of the laser is insufficient, the stability of an output signal of a laser modulation circuit board is influenced, and finally the output wavelength of the laser is drifted. In the prior art, a thermistor is mostly adopted to collect the temperature change inside the laser in real time, and then the working state of the laser diode is judged. However, due to the aging of the laser diode, the expansion with heat and contraction with cold characteristics of the laser diode will change to a certain extent, so that the linear ratio between the external temperature and the output wavelength of the laser diode changes, and the test temperature value of the thermistor is inconsistent with the preset threshold value of the system, thereby causing detection errors and influencing the measurement accuracy and the long-term stability of the system.
Disclosure of Invention
The invention provides a circuit and a method for automatically adjusting the transmitting power of a laser diode, which solve the technical problem that a laser cannot accurately output correct wavelength due to external environment temperature, circuit temperature drift or laser diode aging in the prior art.
In order to solve the technical problems, the invention provides an automatic emission power adjusting circuit of a laser diode, which comprises the laser diode, an MCU connected with the laser diode, an optical power monitoring module and a temperature control module, wherein the optical power monitoring module and the temperature control module are connected with the MCU;
the MCU is used for outputting constant current to the laser diode and presetting a current threshold range;
the laser diode is used for outputting light with corresponding wavelength according to the constant current;
the optical filter is used for filtering light which is emitted by the laser diode and is out of the central wavelength;
the optical power monitoring module is used for detecting the light filtered by the optical filter, converting the light into a corresponding current detection signal and feeding the current detection signal back to the MCU;
the MCU is also used for outputting a corresponding compensation signal to the temperature control module or not according to the current detection signal and the current threshold range;
the temperature control module is used for increasing or decreasing the temperature of the laser diode according to the compensation signal so as to change the output wavelength of the laser diode.
Preferably, the optical filter is a passive filter corresponding to a center wavelength of the laser diode.
Preferably, the temperature control module is a TEC semiconductor refrigerator.
Preferably, the optical power monitoring module is an MPD photodiode.
Preferably, the MCU is internally provided with an LDD laser driver, an LA limiting amplifier and a TEC controller; the LDD laser driver is used for outputting stable current pulses to drive the laser diode to emit light with corresponding wavelengths; the LA limiting amplifier is used for removing the over-high or over-low voltage signal and keeping the stable output of the voltage signal; the TEC controller is used for providing a stable current driving signal for the TEC semiconductor refrigerator.
The invention also provides an automatic adjusting method of the optical power of the laser diode, which corresponds to the automatic adjusting circuit of the emitting power of the laser diode, and comprises the following specific steps:
s1, outputting constant current to the laser diode, and controlling the laser diode to emit light with corresponding wavelength;
s2, filtering the light emitted by the laser diode, only retaining the light with the central wavelength, performing photoelectric conversion, and acquiring a corresponding current detection signal;
s3, according to the current detection signal and the current threshold range, the temperature of the laser diode is compensated and the laser diode returns to the step S2 or does not work.
The step S3 specifically includes the steps of:
s31, judging whether the current detection signal is in the current threshold range, if so, not determining the current detection signal, otherwise, reducing the temperature of the laser diode, and acquiring the current detection signal again;
s32, determining whether the current value of the current detection signal increases after a first preset time period, if so, determining that the wavelength of the laser diode is biased upward and the adjustment direction is correct, returning to the step S31, otherwise, determining that the wavelength of the laser diode is biased downward and the adjustment direction is wrong, and entering step S33;
s33, increasing the temperature of the laser diode and acquiring a current detection signal again;
and S34, judging whether the current detection signal is in the current threshold range after a second preset time period, if so, not judging, otherwise, continuing to increase the temperature of the laser diode, and returning to the step S33.
Preferably, in step S2, the filtering is performed on the light emitted by the laser diode, specifically: and arranging an optical filter in the positive radiation direction of the laser diode, collecting light filtered by the optical filter by using an optical power monitoring module, performing photoelectric conversion, and acquiring a current detection signal corresponding to the filtered light.
Preferably, the reducing or increasing the temperature of the laser diode is specifically: and arranging a temperature control module at the near side of the laser diode, and controlling the temperature control module to absorb heat from the periphery or radiate heat to the periphery so as to reduce or increase the temperature of the laser diode, thereby changing the output wavelength of the laser diode.
Preferably, the optical filter is a passive filter sheet corresponding to the central wavelength of the laser diode; the optical power monitoring module is an MPD photodiode, and the temperature control module is a TEC semiconductor refrigerator.
The invention provides an automatic emission power adjusting circuit of a laser diode, wherein an optical filter is arranged between the laser diode and an optical power monitoring module, only light with central wavelength is reserved, and then the optical power detection module is used for converting the filtered light into an electric signal to be transmitted to an MCU (microprogrammed control unit), so that accurate and rapid optical wave detection of an optical emission component is realized;
the invention also provides an automatic adjustment method of the optical power of the laser diode, which utilizes the Peltier effect of the TEC semiconductor refrigerator, when the light emitted by the laser diode exceeds the effective range of the central wavelength, the temperature of the laser diode is firstly reduced to lower the wavelength of the light emitted by the laser diode, whether the light emitted by the laser diode is in the effective range of the central wavelength is detected after a first preset time period, if so, the adjustment direction is correct, the wavelength of the laser diode is deflected downwards before the adjustment, otherwise, the adjustment direction is wrong, the wavelength of the laser diode is deflected upwards before the adjustment, and the temperature of the laser diode is raised, so that the wavelength of the optical signal emitted by the laser diode is adjusted upwards to be in the effective range of the central wavelength.
The invention provides an automatic emission power adjusting circuit and method of a laser diode, which automatically adjust the output light wavelength of the laser diode by monitoring the light power of central wavelength light in the emitted light of the laser diode in real time, so that the light emitting wavelength (emission power) is maintained in an effective range.
Drawings
Fig. 1 is a system block diagram of an automatic adjustment circuit for the emission power of a laser diode according to an embodiment of the present invention;
FIG. 2 is a hardware circuit diagram of FIG. 1 provided by an embodiment of the present invention;
fig. 3 is a system flowchart of a method for automatically adjusting the emission power of a laser diode according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating step S3 in FIG. 3 according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for automatically adjusting the emission power of a laser diode according to an embodiment of the present invention;
wherein: MCU1, LDD laser driver 11, LA limiting amplifier 12, TEC controller 13; the device comprises a laser diode 2, an optical power monitoring module 3, a temperature control module 4 and an optical filter 5.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which are given solely for the purpose of illustration and are not to be construed as limitations of the invention, including the drawings which are incorporated herein by reference and for illustration only and are not to be construed as limitations of the invention, since many variations thereof are possible without departing from the spirit and scope of the invention.
As shown in fig. 1, in the present embodiment, the circuit for automatically adjusting the emission power of a laser diode 2 includes a laser diode 2, an MCU1 connected to the laser diode 2, an optical power monitoring module 3 and a temperature control module 4 connected to the MCU1, and an optical filter 5 disposed between the laser diode 2 and the optical power monitoring module 3, wherein the temperature control module 4 is disposed near the laser diode 2, and the optical power monitoring module 3 is disposed in a positive radiation direction of the laser diode 2;
the MCU1 is used for outputting a constant current to the laser diode 2 and presetting a current threshold range;
the laser diode 2 is used for outputting light with corresponding wavelength according to the constant current; when the temperature of the laser diode is changed by the change of the external temperature, the output wavelength of the laser diode is correspondingly changed.
The optical filter 5 is used for filtering light emitted by the laser diode 2 except the central wavelength;
the optical power monitoring module 3 is configured to detect the light filtered by the optical filter 5, convert the light into a corresponding current detection signal, and feed the current detection signal back to the MCU 1;
the MCU1 is also used for outputting a corresponding compensation signal to the temperature control module 4 or not according to the current detection signal and the current threshold range;
the temperature control module 4 is used for increasing or decreasing the temperature of the laser diode 2 according to the compensation signal, so as to change the refractive index and the grating pitch of the laser diode.
The optical filter 5 is a passive filter corresponding to the central wavelength of the laser diode 2, and the passive filter is fixedly installed between the laser diode 2 and the optical power monitoring module 3.
The temperature control module 4 is a TEC semiconductor refrigerator, and when current flows from the P end to the N end of the TEC semiconductor refrigerator, the TEC semiconductor refrigerator absorbs heat and cools; when current flows from the N end to the P end of the TEC semiconductor refrigerator, the TEC semiconductor refrigerator releases heat and heats up; the TEC controller 13 is used to provide a stable current drive signal to the TEC semiconductor cooler. The TEC semiconductor refrigerator is close to the laser diode 2, and the temperature of the laser diode 2 can be directly and rapidly increased or decreased.
The optical power monitoring module 3 is an MPD photodiode.
The MCU1 is internally provided with an LDD laser driver 11 and an LA limiting amplifier 12; the LDD laser driver 11 is used for outputting stable current pulses to drive the laser diode 2 to emit light with corresponding wavelengths; the LA limiting amplifier 12 is used to remove the voltage signal that is too high or too low, and keep the stable output of the voltage signal.
Referring TO fig. 2, the passive filter, the MPD photodiode, the TEC semiconductor refrigerator, and the laser diode 2 are packaged in a TO package, and the connection pins extend outward and are electrically connected TO the MCU 1.
Referring to fig. 3, an embodiment of the present invention further provides an automatic optical power adjustment method for a laser diode 2, which corresponds to an automatic transmission power adjustment circuit for the laser diode 2, and the method includes the following specific steps:
s1, outputting a constant current to the laser diode 2, and controlling the laser diode 2 to emit light with corresponding wavelength;
s2, filtering the light emitted by the laser diode 2, only retaining the light with the central wavelength, performing photoelectric conversion, and acquiring a corresponding current detection signal, specifically;
an optical filter 5 is arranged in the positive radiation direction of the laser diode 2, and the optical power monitoring module 3 is used for collecting the light filtered by the optical filter 5, carrying out photoelectric conversion and obtaining a current detection signal corresponding to the filtered light.
S3, according to the current detection signal and the current threshold range, the temperature of the laser diode 2 is compensated and the process returns to the step S2 or does not work.
Referring to fig. 4, the step S3 specifically includes the steps of:
s31, judging whether the current detection signal is in the current threshold range, if so, not performing the current detection signal, otherwise, reducing the temperature of the laser diode 2, and acquiring the current detection signal again;
s32, determining whether the current value of the current detection signal increases after a first preset time period, if yes, determining that the wavelength of the laser diode 2 is biased upward and the adjustment direction is correct, returning to the step S31, otherwise, determining that the wavelength of the laser diode 2 is biased downward and the adjustment direction is wrong, and entering step S33;
s33, increasing the temperature of the laser diode 2 and acquiring a current detection signal again;
s34, determining whether the current detection signal is within the current threshold range after a second preset time period, if so, not performing the current detection, otherwise, continuing to increase the temperature of the laser diode 2, and returning to the step S33.
The reducing or increasing of the temperature of the laser diode 2 is specifically as follows: a temperature control module 4 is arranged at the near side of the laser diode 2, and the temperature control module 4 is controlled to absorb heat from the periphery or radiate heat to the periphery so as to reduce or increase the temperature of the laser diode 2, thereby changing the output wavelength of the laser diode.
The optical filter 5 is a passive filter sheet corresponding to the central wavelength of the laser diode 2; the optical power monitoring module 3 is an MPD photodiode, and the temperature control module 4 is a TEC semiconductor refrigerator.
Referring to fig. 5, the specific workflow is as follows:
firstly, the MCU1 controls the LDD laser driver 11 to output stable current pulses, and outputs constant current to the laser diode 2 under the filtering of the LA limiting amplifier 12, and controls the laser diode 2 to emit light with corresponding wavelength;
subsequently, the MCU1 controls the MPD photodiode to receive the light filtered by the passive filter, and performs photoelectric conversion at the same time, so as to generate a current detection signal I1, and send the current detection signal to the MCU 1. The passive filter corresponds to the central wavelength of the laser diode 2 and is used for filtering light except the central wavelength of the laser diode 2.
The MCU1 judges whether the obtained current detection signal I1 is in the current threshold range, if so, the detection is finished; if not, a forward current from the P end to the N end is input to the TEC semiconductor cooler through the TEC controller 13, and the TEC semiconductor cooler is controlled to absorb heat to reduce the temperature of the laser diode 2. After the first preset time period, the MPD photodiode is controlled again to perform photoelectric conversion, and the current detection signal I2 obtained for the second time is obtained.
Comparing the current detection signals I2 and I1 obtained for the second time, judging whether the I2 is obviously increased compared with the I1, if so, judging that the wavelength of the laser diode 2 is deviated upwards and the adjustment direction is correct, and continuously inputting forward current to the TEC semiconductor refrigerator until the final current detection signal I3 is within the current threshold range, namely, the light output by the laser diode 2 is adjusted to be within the preset effective range of the central wavelength; if not, it is determined that the wavelength of the laser diode 2 is biased downwards and the adjustment direction is wrong, a reverse current from the N end to the P end is input to the TEC semiconductor cooler through the TEC controller 13, and the TEC semiconductor cooler is controlled to release heat to raise the temperature of the laser diode 2 until the final current detection signal I3 is within the current threshold range, that is, the light output by the laser diode 2 is adjusted within the preset effective range of the central wavelength.
The embodiment of the invention provides an automatic emission power adjusting circuit of a laser diode 2.A light filter 5 is arranged between the laser diode 2 and a light power monitoring module 3, only light with central wavelength is reserved, and then the light power detection module is used for converting the filtered light into an electric signal to be transmitted to an MCU1, so that accurate and rapid light wave detection of a light emitting component is realized;
the embodiment of the invention also provides an automatic optical power adjusting method of the laser diode 2, which utilizes the Peltier effect of the TEC semiconductor refrigerator, when the light emitted by the laser diode 2 exceeds the effective range of the central wavelength, the temperature of the laser diode 2 is firstly reduced to lower the wavelength of the light emitted by the laser diode 2, whether the light emitted by the laser diode 2 is in the effective range of the central wavelength is detected after a first preset time period, if so, the adjusting direction is correct, the wavelength of the laser diode 2 is deviated downwards before the adjustment, otherwise, the adjusting direction is wrong, the wavelength of the laser diode 2 is deviated upwards before the adjustment, and at the moment, the temperature of the laser diode 2 is increased, so that the wavelength of the optical signal emitted by the laser diode 2 is regulated upwards to be in the effective range of the central wavelength.
The embodiment of the invention provides an automatic emission power adjusting circuit and method of a laser diode 2, which automatically adjust the output light wavelength of the laser diode 2 by monitoring the light power of central wavelength light in the emitted light of the laser diode 2 in real time, so that the light emitting wavelength (emission power) is maintained in an effective range, the structure is simple, the measurement precision is high, the test error caused by the external environment temperature, the circuit temperature drift or the aging of the laser diode 2 is effectively avoided, the detection efficiency is greatly improved, and the production cost is reduced.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The automatic adjusting circuit of the transmitting power of a laser diode comprises the laser diode, and is characterized in that: the laser device also comprises an MCU connected with the laser diode, and a light power monitoring module and a temperature control module connected with the MCU, and also comprises an optical filter arranged between the laser diode and the light power monitoring module, wherein the temperature control module is arranged at the near side of the laser diode, and the light power monitoring module is arranged in the positive radiation direction of the laser diode;
the MCU is used for outputting constant current to the laser diode and presetting a current threshold range;
the laser diode is used for outputting light with corresponding wavelength according to the constant current;
the optical filter is used for filtering light which is emitted by the laser diode and is out of the central wavelength;
the optical power monitoring module is used for detecting the light filtered by the optical filter, converting the light into a corresponding current detection signal and feeding the current detection signal back to the MCU;
the MCU is also used for outputting a corresponding compensation signal to the temperature control module or not according to the current detection signal and the current threshold range;
the temperature control module is used for increasing or decreasing the temperature of the laser diode according to the compensation signal so as to change the output wavelength of the laser diode.
2. The automatic adjustment circuit of emission power of a laser diode according to claim 1, wherein: the optical filter is a passive filter sheet corresponding to the central wavelength of the laser diode.
3. The automatic adjustment circuit of emission power of a laser diode according to claim 1, wherein: the temperature control module is a TEC semiconductor refrigerator.
4. The automatic adjustment circuit of emission power of a laser diode according to claim 1, wherein: the optical power monitoring module is an MPD photodiode.
5. The automatic adjustment circuit of emission power of a laser diode according to claim 3, wherein: the MCU is internally provided with an LDD laser driver, an LA amplitude limiting amplifier and a TEC controller; the LDD laser driver is used for outputting stable current pulses to drive the laser diode to emit light with corresponding wavelengths; the LA limiting amplifier is used for removing the over-high or over-low voltage signal and keeping the stable output of the voltage signal; the TEC controller is used for providing a stable current driving signal for the TEC semiconductor refrigerator.
6. A method for automatically adjusting the optical power of a laser diode is characterized by comprising the following specific steps:
s1, outputting constant current to the laser diode, and controlling the laser diode to emit light with corresponding wavelength;
s2, filtering the light emitted by the laser diode, only retaining the light with the central wavelength, performing photoelectric conversion, and acquiring a corresponding current detection signal;
s3, according to the current detection signal and the current threshold range, the temperature of the laser diode is compensated and the laser diode returns to the step S2 or does not work.
7. The method as claimed in claim 6, wherein the step S3 specifically includes the steps of:
s31, judging whether the current detection signal is in the current threshold range, if so, not determining the current detection signal, otherwise, reducing the temperature of the laser diode, and acquiring the current detection signal again;
s32, determining whether the current value of the current detection signal increases after a first preset time period, if so, determining that the wavelength of the laser diode is biased upward and the adjustment direction is correct, returning to the step S31, otherwise, determining that the wavelength of the laser diode is biased downward and the adjustment direction is wrong, and entering step S33;
s33, increasing the temperature of the laser diode and acquiring a current detection signal again;
and S34, judging whether the current detection signal is in the current threshold range after a second preset time period, if so, not judging, otherwise, continuing to increase the temperature of the laser diode, and returning to the step S33.
8. The method as claimed in claim 7, wherein in the step S2, the filtering is performed on the light emitted from the laser diode, specifically: and arranging an optical filter in the positive radiation direction of the laser diode, and collecting light filtered by the optical filter by using an optical power monitoring module.
9. The method according to claim 8, wherein the reducing or increasing the temperature of the laser diode comprises: and arranging a temperature control module at the near side of the laser diode, and controlling the temperature control module to absorb heat from the periphery or radiate heat to the periphery so as to reduce or increase the temperature of the laser diode, thereby changing the output wavelength of the laser diode.
10. The method of claim 9, wherein the step of automatically adjusting the optical power of the laser diode comprises: the optical filter is a passive filter sheet corresponding to the central wavelength of the laser diode; the optical power monitoring module is an MPD photodiode, and the temperature control module is a TEC semiconductor refrigerator.
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| CN201911242291.4A CN111106530A (en) | 2019-12-06 | 2019-12-06 | Automatic emission power adjusting circuit and method for laser diode |
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| CN201911242291.4A CN111106530A (en) | 2019-12-06 | 2019-12-06 | Automatic emission power adjusting circuit and method for laser diode |
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| CN113113842A (en) * | 2021-03-22 | 2021-07-13 | 武汉光迅科技股份有限公司 | Optical module wavelength control method, device and storage medium |
| CN115133997A (en) * | 2021-03-24 | 2022-09-30 | 青岛海信宽带多媒体技术有限公司 | Optical module and debugging method for reducing power consumption of optical module |
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| CN108767645A (en) * | 2018-05-16 | 2018-11-06 | 深圳市太赫兹科技创新研究院 | Laser light source based on OCT spectroscopy applications |
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| CN1442933A (en) * | 2003-03-28 | 2003-09-17 | 中国科学院上海光学精密机械研究所 | Method and device of stabilizing high power semiconductor laser output wave length |
| CN102349204A (en) * | 2011-08-16 | 2012-02-08 | 华为技术有限公司 | Ajustable laser, optical module and passive optical network system |
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| CN113113842A (en) * | 2021-03-22 | 2021-07-13 | 武汉光迅科技股份有限公司 | Optical module wavelength control method, device and storage medium |
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| CN115133997A (en) * | 2021-03-24 | 2022-09-30 | 青岛海信宽带多媒体技术有限公司 | Optical module and debugging method for reducing power consumption of optical module |
| CN115133997B (en) * | 2021-03-24 | 2024-05-03 | 青岛海信宽带多媒体技术有限公司 | Optical module and debugging method for reducing power consumption of optical module |
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Application publication date: 20200505 |