CN103973364A - Optical analysis method and equipment capable of simultaneously measuring optical fiber parameters through multiple channels - Google Patents
Optical analysis method and equipment capable of simultaneously measuring optical fiber parameters through multiple channels Download PDFInfo
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- CN103973364A CN103973364A CN201410208239.8A CN201410208239A CN103973364A CN 103973364 A CN103973364 A CN 103973364A CN 201410208239 A CN201410208239 A CN 201410208239A CN 103973364 A CN103973364 A CN 103973364A
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Abstract
The invention provides an optical analysis method capable of simultaneously measuring optical fiber parameters through multiple channels. Multiple out-emitting optical waves separated and obtained from a single optical fiber by a wave separator respectively act on a plurality of photoelectric sensor elements and an optical spectrum analyser to obtain the wave length and the power data of the out-emitting optical waves; then, the wave length and the power data of the out-emitting optical waves are compared with the wavelength and the power data of the in-emitting optical waves to obtain deviation information, so that measurement and judgment of receiver sensitivity, dynamic range, optical fiber attenuation, contact attenuation and other aspects are facilitated. A set of optical analysis equipment comprises a CPU module, a photoelectric sensor device, a logarithmic amplifier, an A/D converter, the optical spectrum analyser and a drive and control circuit. The optical analysis equipment is small in size, light in weight, sturdy, durable, and suitable for optical network installation, acceptance check and maintenance of a DWDM system.
Description
Technical field
The present invention relates to a kind of method for measuring optical fiber parameter, relate in particular to a kind of photodissociation analysis method for measuring optical fiber parameter, be convenient to the more measurement and the judgements of face such as receiver sensitivity and dynamic range, optical fiber attenuation and joint attenuation, and the equipment of implementing analytic method in this, this equipment can, based on Web webmaster, be realized simultaneously and measuring multichannel optical fiber.
Background technology
Along with making rapid progress of information technology, Internet continues the growth momentum that is keeping swift and violent, people by the Internet share information, diffusing information has reached unprecedented prosperity degree.And obtain remote information and control appliance by Internet, become the target of another pursuit of people.The development of embedded Web network management technology makes to realize such hope becomes possibility.In embedded device, embed Web webmaster, just can pass through network remote obtaining information and control appliance.
Chinese utility model patent ZL200720076278.2 discloses a kind of light property detector, comprises optical switch, microprocessor, tunable filter, optical shunt device, FP etalon and reference wavelength laser.Tunable filter is controlled the optical wavelength seeing through according to different voltage, wavelength one by one in test light is extracted and filters out, the light signal that optical shunt device filters out by the extraction of tunable filter is divided into two parts, a part is directly measured luminous power, and another part enters and in FP etalon, carries out wavelength mensuration.Make thus detector volume little, cost is low simultaneously, and better reliability is conveniently used under mobile and adverse circumstances.
Chinese invention patent ZL02142768.2 discloses a kind of for monitoring the device of the optical signal property of wavelength-division multiplex system, comprises the natural luminescence emissions device of amplification, and that produce to amplify is transmitted into reference light path naturally; Fiber Bragg Grating FBG, only reflection or absorption are transmitted into the transmitting naturally of the amplification conforming to reflection wavelength or absorbing wavelength of reference light path, transmitting has the transmitting naturally of the amplification of reference wavelength, and predetermined reflection wavelength or absorbing wavelength are arranged on reference light path discretely; Optical switch, the transmitting naturally of the wavelength-division-multiplexed optical signal that output separates from key light path or the amplification that comprises reference wavelength; Adjustable light wave-filter, its filtering characteristic changes according to filtering control signal, obtain the output of optical signals optical switch, and output is through the light signal of filtering through filtering; Controller, analyzes the output of adjustable light wave-filter is carried out to the photodiode of opto-electronic conversion and its according to the output of pre-defined algorithm, and the reference wavelength based on analyzing is measured optical wavelength, luminous power and the Optical Signal To Noise Ratio of wavelength-division-multiplexed optical signal.
Chinese invention patent ZL200410035303.3 discloses a kind of equipment of following the tracks of optical wavelength in Wave division multiplexing passive optical network, in Wave division multiplexing passive optical network, the central station with multifrequency source is connected with a plurality of optical network units with loopback light source by the wavelength division multiplexing multiplexer/demultiplexer in remote node, this optical wavelength tracking equipment comprises the first measuring light power device, for measure from multifrequency source be sent to wavelength division multiplexing multiplexer/demultiplexer, for the power stage of the descending wavelength-division-multiplexed optical signal of a plurality of optical network units; The second measuring light power device, for measuring the power stage of the up wavelength-division-multiplexed optical signal of receiving from the loopback light source of optical network unit by wavelength division multiplexing multiplexer/demultiplexer; And control unit, for controlling the wavelength division multiplexing wavelength of multifrequency source and the wavelength division multiplexing wavelength of wavelength division multiplexing multiplexer/demultiplexer is almost equal, to make the difference between the power stage of the descending and up wavelength-division-multiplexed optical signal measured reduce to minimum.
Chinese invention patent application 201310169459.X discloses a kind of measuring light power system for coarse wavelength division multiplexing systems, comprises photo-detector, multiway analog switch, amplifying circuit, single-chip microcomputer and the display unit of demodulation multiplexer, integrated belt bandpass filter.Use the photo-detector of demodulation multiplexer and integrated belt bandpass filter by the shunt of wavelength, filtering and detection, multiway analog switch is connected to amplifying circuit by multichannel wavelength detector, by opening successively the mode of multiway analog switch, each wavelength is measured one by one.Solve the limitation that traditional light power meter can not be measured multi-wavelength system, realized the real-time measurement to each wavelength power in CWDM system.
Dense wave division multipurpose (Dense wavelength division multiplexing, DWDM) system is a laser technology that is used for improving at existing fiber shaft bandwidth on the net.This technology can be in the optical fiber of an appointment, and the tight spectrum spacing of multiplexed single fiber carrier, to utilize the transmission performance that can reach.Thus, under given communication capacity, just can reduce needed optical fiber total quantity.When dwdm system is deployed in construction or erection stage, must on optical fiber, from the beginning hold end user and rightabout test.Single end testing has clear superiority, and the object of test is integrity authentication link, also can carry out real time monitoring, and whole process be unable to do without several important parameters such as optical wavelength and luminous power.Such as the measurement of receiver sensitivity and dynamic range, the measurement of optical fiber attenuation, joint attenuation, be in fact also the parameters such as the optical wavelength at measuring optical fiber two ends and power.
The progress of DWDM technology, improves constantly channel speed, and system frequency interval is shorter and shorter, and it is increasing that capacity becomes, and system also becomes more and more responsive to wavelength and power.In order to prevent that external environment condition from changing, cause wavelength and power to occur deviation, need to system go out optical wavelength and power is resolved, and need a kind of dwdm system multichannel light analyzing device that is applicable to.
Summary of the invention
One object of the present invention is to provide a kind of multichannel photodissociation analysis method of measuring optical fiber parameter simultaneously, with low-cost and high efficiency mode, the light signal on dwdm system multichannel is detected.
Another object of the present invention is to provide a kind of multichannel photodissociation desorption device of measuring optical fiber parameter simultaneously, by Internet, realizes with low-cost and high efficiency mode the light signal on dwdm system multichannel is detected and controlled.
A kind of multichannel provided by the invention is the photodissociation analysis method of measuring optical fiber parameter simultaneously, and its step is as follows:
Channel-splitting filter separated multiple emergent light wavelength-division obtaining from single optical fiber is not acted on to a plurality of photo electric sensitive elements, make each photo electric sensitive element gather respectively a kind of light signal, be converted into photoelectric current; Then, by the photoelectric current of collection after logarithmic amplifier transfers voltage signal to, the luminous power data of the luminous power data of each outgoing light wave the obtaining incident light wave corresponding with this kind of outgoing light wave are compared, draw the deviate of this kind of light luminous power in transmission.
Simultaneously, channel-splitting filter separated multiple outgoing light wave obtaining from single optical fiber is acted on to optical spectrum analyser, by optical spectrum analyser, according to the instruction of processor, input light wavelength is filtered, then the wavelength signals of determined outgoing light wave is converted to the signal of telecommunication, the optical wavelength data of the optical wavelength data of each outgoing light wave the obtaining incident light wave corresponding with this kind of outgoing light wave are compared, draw the deviate of this kind of light optical wavelength in transmission.
In analytic method provided by the invention, act on each outgoing light wave of a plurality of photo electric sensitive elements and optical spectrum analyser preferential select to be undertaken along separate routes by 97: 3 through splitter and 3% light signal.
In analytic method provided by the invention, as carrying out necessity of exchanges data with processor, resulting relevant analog signal can be exchanged into digital signal or quantize after input processor again, be convenient to processor and the information of acquisition is directly used in to man-machine interface shows and data processing.
For coordinating the multichannel provided by the invention enforcement of the photodissociation analysis method of measuring optical fiber parameter simultaneously, need corresponding photodissociation desorption device.
A kind of multichannel provided by the invention is the photodissociation desorption device of measuring optical fiber parameter simultaneously, comprising:
CPU module, for the signal of external command or collection is processed, and output services instruction.Concrete, CPU module is ARM9 flush bonding processor, on it, comprise FLASH memory, sdram memory and eeprom memory, and the expansion connectivity port such as RJ45 interface, LCD LCD Interface, peripheral hardware I/O, RS232 serial ports, JTAG debug port, USB interface.
Photoelectric sensor, comprises some photo electric sensitive elements (as: PD photoelectric diode), and the light signal collecting is converted to photoelectric current.
Logarithmic amplifier, for the photoelectric current of photoelectric sensor output is converted to voltage signal output, comprise some logarithmic amplification elements, each logarithmic amplification element is corresponding one by one with each photo electric sensitive element, and the photoelectric current receiving is converted to voltage signal output.
A/D converter, is connected with CPU module, for the voltage signal of logarithmic amplifier output is realized to analog-to-digital conversion.The preferential multi-channel a/d converter (as: 8 passage) of selecting.
For realize the detection to optical wavelength and luminous power simultaneously, photodissociation desorption device of the present invention also comprises optical spectrum analyser and Drive and Control Circuit.
Optical spectrum analyser, for input light wavelength is filtered and determined, and is converted to the signal of telecommunication by light signal, then converts the electrical signal to numerical value, sends CPU module to.
An execution mode for optical spectrum analyser, it is comprised of tunable optic filter and wavelength locker, and tunable optic filter is used for filtering input light wavelength and finds out input light wavelength; Wavelength locker is used for the input light of known wavelength accurately to lock, and light signal is converted to the signal of telecommunication, then converts the electrical signal to numerical value, sends CPU module to.
Drive and Control Circuit, is connected with CPU module with optical spectrum analyser respectively, for powering to optical spectrum analyser, and CPU module controls instruction input spectrum analyzer is carried out to wavelength analysis, or the wavelength data that optical spectrum analyser is obtained is exported to CPU module.
A kind of to the power supply circuits of optical spectrum analyser power supply, the control circuit of optical spectrum analyser and data path form, for the power supply of optical spectrum analyser, the wavelength of optical spectrum analyser filter and locking and and CPU module between the transmission of numerical value.
The beneficial effect that technical solution of the present invention realizes:
Photodissociation analysis method provided by the invention, various light waves are acted on respectively to a plurality of photo electric sensitive elements and optical spectrum analyser, obtain respectively wavelength and the power data of outgoing light wave, then compare with wavelength and the power data of incident light wave, optical wavelength deviate and the luminous power deviate obtaining of take is foundation, be suitable for the application of dwdm system (as: 80 kinds of light waves), be convenient to the more measurement and the judgements of face such as receiver sensitivity and dynamic range, optical fiber attenuation and joint attenuation.
Photodissociation desorption device provided by the invention, volume is little, lightweight, sturdy and durable, and the optical-fiber network that is applicable to dwdm system is installed, is checked and accepted and safeguards.80 kinds of default passages are reduced into 50GHz by each channel spacing, have realized the centralized monitor to multi-wavelength by an equipment, and also brought up to ± 4GHz of wavelength accuracy of detection, have met well the performance requirement of system.
Because normal optical analyzing device cannot be measured respectively the light signal of the different wave length on wavelength division multiplexed network simultaneously, present device makes dwdm system possess nearly 80 kinds of above passages, on these passages, the light signal of different wave length has been realized on an optical fiber multiplexing, and under various environment, can both provide fast, measure reliably, also make the cost of photodissociation desorption device greatly to reduce.
Photodissociation desorption device provided by the invention, by built-in embedded web server, user can also carry out optical wavelength and the isoparametric monitoring of power to 80 of dwdm system kinds of passages by Internet, convenient for users, has improved user job efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of photodissociation desorption device one embodiment of the present invention;
Fig. 2 is the schematic diagram that photodissociation desorption device of the present invention is applied to dwdm system.
Embodiment
Below in conjunction with accompanying drawing, describe technical scheme of the present invention in detail.The embodiment of the present invention is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical scheme of invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in claim scope of the present invention.
Multichannel of the present invention is the photodissociation analysis method of measuring optical fiber parameter simultaneously, that channel-splitting filter separated multiple emergent light wavelength-division obtaining from single optical fiber is not acted on to a plurality of photo electric sensitive elements, make each photo electric sensitive element gather a kind of light signal, be converted into photoelectric current; Then, by the photoelectric current of collection after logarithmic amplifier transfers voltage signal to, the luminous power data of the luminous power data of each outgoing light wave the obtaining incident light wave corresponding with this kind of outgoing light wave are compared, draw the deviate of this kind of light luminous power in transmission;
Simultaneously, channel-splitting filter separated multiple outgoing light wave obtaining from single optical fiber is acted on to optical spectrum analyser, by optical spectrum analyser, according to the instruction of processor, input light wavelength is filtered, then the wavelength signals of determined outgoing light wave is converted to the signal of telecommunication, the optical wavelength data of the optical wavelength data of each outgoing light wave the obtaining incident light wave corresponding with this kind of outgoing light wave are compared, draw the deviate of this kind of light optical wavelength in transmission.
In DWDM technology, multiple enter light wave (λ 1, λ 2, λ 3 ..., λ 80) through wave multiplexer, close ripple and be included in single optical fiber and transmit.Therefore, in the process of concrete application analytic method of the present invention, be necessary that (but be not must) adopts channel-splitting filter elder generation from optical fiber, to decomposite the multiple light wave that goes out, and then acts on photo electric sensitive element and optical spectrum analyser by these light waves.As a kind of means that are more conducive to parsing, can also take various bright dipping wavelength-divisions through splitter, by 97: 3, not carry out shunt, using 3% light signal as input lightwave signal, act on photo electric sensitive element and optical spectrum analyser.
For making data processing more favourable, such as the necessity that adopts processor to carry out exchanges data and processing, be necessary (but be not must) resulting relevant analog signal can be exchanged into digital signal or quantize after input processor again, be convenient to processor and the information of acquisition is directly used in to man-machine interface shows and data processing.
In order to implement photodissociation analysis method of the present invention, the present embodiment also provides a kind of related resolution equipment.As shown in Figure 1, this photodissociation desorption device comprises CPU module 1, optoelectronic sensor 2, logarithmic amplifier 3, A/D converter 4, optical spectrum analyser 5 and Drive and Control Circuit 6.
For ease of detecting application at multiple light wave, the optoelectronic sensor 2 of the present embodiment photodissociation desorption device adopts 80 InGaAs photodiodes (luminous power detection range is 0～-80dBm) that 80 kinds of light wave passages are provided, logarithmic amplifier 3 has also adopted 80 AD8310 type logarithmic amplification elements and PD photoelectric diode corresponding and read the photoelectric current of output one by one simultaneously, is converted to voltage signal and exports A/D converter 4 to.A/D converter 4 is comprised of 10 MAX1202 types, 8 passage A/D conversion elements, and each sheet A/D conversion element is connected with 8 AD8310 type logarithmic amplification elements respectively.
CPU module is ARM9 embedded processor system, adopts the AT91SAM9261 processor of atmel corp, is altogether provided with 217 pins, can connect 10 MAX1202 types, 8 passage A/D conversion elements simultaneously.In addition also integrated FLASH memory, sdram memory and eeprom memory on it.FLASH memory is deposited original program, and SDRAM deposits program and the data of operation, EEPROM saved system important information.Application for aspects such as the exchanges data of raising equipment and external equipment and Long-distance Control, is also provided with multiple Peripheral Interface, as: RJ45 interface, LCD LCD Interface, peripheral hardware I/O, RS232 serial ports, JTAG debug port and USB interface etc.By RJ45 mouth and embedded network management, communicate, realize with main frame Web webmaster and communicating.Host debug software is controlled by RS232 serial ports.The external man-machine interface of LCD LCD Interface (as: LCD liquid crystal display screen), shows that ARM9 flush bonding processor is by the wavelength data detecting.Peripheral hardware I/O controls and reads the output data of each sheet A/D conversion element.
Optical spectrum analyser is comprised of tunable optic filter and wavelength locker, tunable optic filter adopts the F-P adjustable optic fibre filter of Guang Ku company, bandwidth of operation: C, L-band, wavelength adjustable extent >80nm, have that volume is little, sweep speed is fast, Heat stability is good, the low and reliable and stable feature of insertion loss.Wavelength locker adopts the wavelength locker of Ang Na company, and channel spacing can reach 25GHz, wavelength adjustable extent >100nm, and precision ± 1.25GHz, has that versatility is good, temperature stability is good and lock the high feature of precision.
Drive and Control Circuit is comprised of control circuit and the data path of the power supply circuits of powering to optical spectrum analyser, optical spectrum analyser, the OP27 integrated circuit of the ShiAD company that the present invention adopts.First it power to optical spectrum analyser, secondly CPU module is by I/O port controlling, send the instruction of filtering and lock required wavelength to optical spectrum analyser, optical spectrum analyser filters and locks required wavelength according to instruction, and sends the numerical value after conversion to CPU module again.
The photodissociation desorption device of the present embodiment makes dwdm system possess nearly 80 kinds of above passages, on these passages, the light signal of different wave length has been realized on an optical fiber multiplexing, and under various environment, can both provide fast, measure reliably, also make the cost of photodissociation desorption device greatly to reduce.Take unidirectional transmission system as example, as shown in Figure 2, multiple enter light wave (λ 1, λ 2, λ 3 ..., λ 80) through wave multiplexer, close ripple and be included in single optical fiber and transmit, at the other end, through channel-splitting filter, be decomposed into again the multiple light wave that goes out again, various bright dipping wavelength-divisions not through splitter by carrying out shunt at 97: 3, input lightwave signal using 3% light signal as photodissociation desorption device, each photodiode (PD pipe 1 ..., PD pipe 80) gathered light signal is converted to photoelectric current.In conjunction with Fig. 1, the photoelectric current obtaining is converted to voltage signal by each logarithmic amplification element again and exports, after analog-to-digital conversion, input ARM9 embedded processor system, by this processor, related data is directly shown in to external equipment (as: LCD liquid crystal display screen), technical staff just can recognize various wavelength and the power parameters that go out light wave that decompose through channel-splitting filter, and with enter light wave and compare after, just can whether there is the situation that occurs deviation by the various light waves of intuitive judgment, thus the problem of the deviation that guidance technology people finder solution produce.
Claims (10)
1. a multichannel photodissociation analysis method for measuring optical fiber parameter simultaneously, its step is as follows:
Channel-splitting filter separated multiple emergent light wavelength-division obtaining from single optical fiber is not acted on to a plurality of photo electric sensitive elements, make the photo electric sensitive element described in each gather respectively a kind of light signal, be converted into photoelectric current; Then, by the photoelectric current of collection after logarithmic amplifier transfers voltage signal to, the luminous power data of the luminous power data of each outgoing light wave the obtaining incident light wave corresponding with this kind of outgoing light wave are compared, draw the deviate of this kind of light luminous power in transmission;
Simultaneously, channel-splitting filter separated multiple outgoing light wave obtaining from single optical fiber is acted on to optical spectrum analyser, by described optical spectrum analyser, according to the instruction of processor, input light wavelength is filtered, then the wavelength signals of determined outgoing light wave is converted to the signal of telecommunication, the optical wavelength data of the optical wavelength data of each outgoing light wave the obtaining incident light wave corresponding with this kind of outgoing light wave are compared, draw the deviate of this kind of light optical wavelength in transmission.
2. the multichannel according to claim 1 photodissociation analysis method of measuring optical fiber parameter simultaneously, it is characterized in that described each outgoing light wave that acts on a plurality of photo electric sensitive elements and optical spectrum analyser be through splitter, by 97: 3, undertaken along separate routes and 3% light signal.
3. for a multichannel claimed in claim 1 equipment for the photodissociation analysis method of measuring optical fiber parameter simultaneously, it is characterized in that comprising
CPU module, for the signal of external command or collection is processed, and output services instruction;
Photoelectric sensor, comprises some photo electric sensitive elements, and the light signal collecting is converted to photoelectric current;
Logarithmic amplifier, comprises some logarithmic amplification elements, and the logarithmic amplification element described in each part is corresponding one by one with the photo electric sensitive element described in each part, and the photoelectric current receiving is converted to voltage signal output;
A/D converter, is connected with described CPU module, for the voltage signal of described logarithmic amplifier output is realized to analog-to-digital conversion;
Optical spectrum analyser, for input light wavelength is filtered and determined, and is converted to the signal of telecommunication by light signal, then converts the electrical signal to numerical value, sends described CPU module to;
Drive and Control Circuit, be connected with described CPU module with described optical spectrum analyser respectively, for the optical spectrum analyser power supply to described, and the described described optical spectrum analyser of CPU module controls instruction input is carried out to wavelength analysis, or the wavelength data that described optical spectrum analyser is obtained is exported to CPU module.
4. the photodissociation desorption device of multichannel while measuring optical fiber parameter according to claim 3, is characterized in that described photo electric sensitive element is 80, and described logarithmic amplification element is 80.
5. the photodissociation desorption device of multichannel while measuring optical fiber parameter according to claim 3, is characterized in that described photo electric sensitive element is InGaAs photodiode.
6. the photodissociation desorption device of multichannel while measuring optical fiber parameter according to claim 3, is characterized in that described A/D conversion element is MAX1202 type 8 passage A/D conversion elements.
7. the photodissociation desorption device of multichannel while measuring optical fiber parameter according to claim 3, is characterized in that described CPU module is AT91SAM9261 processor, is altogether provided with 217 pins.
8. the multichannel according to claim 3 photodissociation desorption device of measuring optical fiber parameter simultaneously, it is characterized in that described CPU module also comprises FLASH memory, sdram memory and eeprom memory, and one or more of RJ45 interface, LCD LCD Interface, peripheral hardware I/O, RS232 serial ports, JTAG debug port and USB interface.
9. the photodissociation desorption device of multichannel while measuring optical fiber parameter according to claim 3, is characterized in that described optical spectrum analyser is comprised of tunable optic filter and wavelength locker.
10. the photodissociation desorption device of multichannel while measuring optical fiber parameter according to claim 3, is characterized in that described Drive and Control Circuit comprises
Power supply circuits, power to described optical spectrum analyser;
The control circuit of optical spectrum analyser, for sending the instruction of filtering and lock required wavelength to described optical spectrum analyser; And
Data path, the numerical value after the wavelength conversion that described optical spectrum analyser is filtered and locked sends CPU module again to.
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Application publication date: 20140806 |