CN201878152U - Distribution type raman amplifier control system based on onsite programmable logic array - Google Patents
Distribution type raman amplifier control system based on onsite programmable logic array Download PDFInfo
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- CN201878152U CN201878152U CN2010201245713U CN201020124571U CN201878152U CN 201878152 U CN201878152 U CN 201878152U CN 2010201245713 U CN2010201245713 U CN 2010201245713U CN 201020124571 U CN201020124571 U CN 201020124571U CN 201878152 U CN201878152 U CN 201878152U
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Abstract
The utility model relates to a distribution type raman amplifier control system based on an onsite programmable logic array. The distribution type raman amplifier control system comprises an output power monitoring unit for monitoring the output power of a raman amplifier, a pumping parameter monitoring unit for acquiring the parameter of a pumping laser of the raman amplifier, a pumping power control unit for controlling the power of the pumping laser, an interface unit connected to outside and a control unit for receiving, operating or processing the signal and outputting a control signal, wherein the output power monitoring unit, the pumping parameter monitoring unit and the pumping power control unit are respectively in parallel connection with the control unit, and the control unit is connected with the interface unit. In the embodiment of the utility model, the distribution type raman amplifier control system based on the onsite programmable logic array has the beneficial effect of more ideal gain flatness.
Description
Technical field
The utility model relates to the optical communication field, more particularly, relates to a kind of distributed raman amplifier control system based on field programmable logic array.
Background technology
In optical fiber telecommunications system, succeeding in developing and using of fiber amplifier promoted the truly development of close wavelength-division multiplex technology (DWDM), caused the major transformation of fiber optic communication field.Fiber amplifier is the pillar of DWDM optical fiber telecommunications system, because amplifier is in saturation condition, channel Lu Hui up and down causes that the residue channel power changes, and transient effect takes place, and causes tangible nonlinear effect, cause system signal noise ratio to reduce and.Therefore the fiber amplifier performance is to improve one of key technology of optical fiber telecommunications system capacity and distance with control.Raman amplifier (FRA) because its flexibly gain band and 100nm gain bandwidth and be widely used.One big advantage of distributed raman amplifier is that gain bandwidth is very wide, and for long Distance Transmission, transmission range is long more, the suffered environment of transmission system and various can not to survey factor affecting also big more, and gain will produce tangible random fluctuation; The increase and decrease of number of wavelengths can make that also gain fluctuation is very violent.Fiber amplifier signal to noise ratio and gain characteristic are the main performance index of amplifier system, and the accumulation of gain fluctuation will seriously influence the error rate of signal, so the smooth of gain just become a very major issue.When more fiber channel existed, owing to need Channel Processing one by one, it was just more outstanding to control problem consuming time.In existing technology, owing to do not take real-time gain controlling or when control consuming time longer, the flatness of its gain is unsatisfactory.
The utility model content
The technical problems to be solved in the utility model is, at prior art above-mentioned because consuming time longer when not taking real-time gain controlling or control, the unsatisfactory defective of the flatness of its gain, provide a kind of control time shorter, the distributed raman amplifier control system that its gain flatness is comparatively desirable based on field programmable logic array.
The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of distributed raman amplifier control system based on field programmable logic array, comprise the power output monitoring means of monitoring described raman amplifier power output, obtain the pumping parameter monitoring unit of described raman amplifier pump laser parameter, control the pump power control unit of described pump laser power, the interface unit that is connected with the external world and receive union or handle described power monitoring unit, the signal of described pumping parameter monitoring unit and described interface unit output is also exported the control unit of control signal, described power output monitoring means, pumping parameter monitoring unit is connected with described control unit is parallel respectively with the pump power control unit; Described interface unit is connected with described control unit.
In the distributed raman amplifier control system based on field programmable logic array described in the utility model, described pumping parameter monitoring unit comprises laser power monitor subelement, temperature monitoring subelement and operating current monitoring subelement, and described each subelement is connected between described pump laser and the described control unit.
In the distributed raman amplifier control system based on field programmable logic array described in the utility model, described each subelement comprises that the parameter that obtains parameter value by described pump laser obtains interface circuit, amplifies that described parameter obtains first amplifier of interface circuit output valve and described amplifier output valve carried out analog-to-digital conversion and output to the analog to digital conversion circuit of described control unit.
In the distributed raman amplifier control system based on field programmable logic array described in the utility model, described pump power control unit comprises the D/A converting circuit that the pump laser power control signal with the output of described control unit carries out digital-to-analogue conversion, described D/A converting circuit output is amplified and is sent to second amplifier of described pump laser control end.
In the distributed raman amplifier control system based on field programmable logic array described in the utility model, described pump laser comprises a plurality of, and its output is pooled to optical fiber by wavelength division multiplexing.
In the distributed raman amplifier control system based on field programmable logic array described in the utility model, described power output monitoring means comprises the coupler that is taken out described optical signal power by described optical fiber place after compiling by wavelength division multiplexing in proportion, the Deplexing apparatus that the described optical signal power of obtaining is separated by its channel, a plurality of photodetectors that are connected to each channel output of described Deplexing apparatus and the light signal of its output are converted to the signal of telecommunication, is connected with the output of described photodetector respectively and with the channel amplifier of this signal amplification, is connected and from its output, selects MUX of output with described each channel amplifier output, a plurality ofly export the channel power analog to digital conversion circuit that is connected and its signal is carried out being transported to after the analog-to-digital conversion described control unit with described MUX respectively.
In the distributed raman amplifier control system based on field programmable logic array described in the utility model, photodetector in the described power output monitoring means and channel amplifier are corresponding one by one and be respectively a plurality of, and its channel power analog to digital conversion circuit is at least one.
In the distributed raman amplifier control system based on field programmable logic array described in the utility model, described interface unit comprises RS232 interface and the Ethernet interface that is connected with described control unit respectively.
In the distributed raman amplifier control system based on field programmable logic array described in the utility model, also comprise the memory module that is connected, is used to store data and program with described control unit, described memory module comprises flash memories, SRAM and the SDRAM that is connected with described control unit respectively.
Implement the distributed raman amplifier control system based on field programmable logic array of the present utility model, has following beneficial effect: obtain or export owing to the various parameters with each fiber channel all walk abreast, it can realize the control of each channel with the short time under the situation of more fiber channel, thereby makes its gain flatness comparatively desirable.
Description of drawings
Fig. 1 is the structured flowchart of the utility model based on the distributed raman amplifier control system embodiment of field programmable logic array;
Fig. 2 is the structural representation of each unit of described embodiment.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described further.
As shown in Figure 1, in the distributed raman amplifier control system embodiment of the utility model, comprise: the optical fiber 5 of control unit 1, power output monitoring means 2, pump power control unit 3, pumping parameter monitoring unit 4, raman amplifier 6, interface unit 7, memory module 8 and transmitting optical signal as the lower part based on field programmable logic array.Wherein, power output monitoring means 2, pump power control unit 3, pumping parameter monitoring unit 4, interface unit 7, memory module 8 link to each other with control unit 1 respectively, simultaneously power output monitoring means 2, pump power control unit 3, pumping parameter monitoring unit 4 also are connected with the output of raman amplifier 6 or control end or state output end respectively, form control ring, finish by parameter obtain, parameter is handled exclusive disjunction makes raman amplifier be in the whole controlled function to the Raman controller of the state of setting or envisioning to the output Control Parameter.
Particularly, power output monitoring means 2 monitoring raman amplifiers 6 power outputs, and, make control unit 1 can learn the power output of current raman amplifier 6 with sending to control unit 1 after its signal that obtains process processing, amplification, the analog-to-digital conversion; Pumping parameter monitoring unit 4 is obtained each parameter of raman amplifier pump laser respectively, and is sent to above-mentioned control unit 1 after respectively these parameters being handled; Pump power control unit 3 is accepted the pumping control signal (these control signals are to be obtained after the parameter of a pump laser is handled by above-mentioned control unit 1) of above-mentioned control unit 1 output, and handle this control signal, send it to pump laser after making its requirement that meets pump laser; Control unit 1 then receives union or handles above-mentioned signal, and the output control signal is controlled described pump laser power; Interface unit 7 is used for each part mentioned above is connected with extraneous by control unit 1, receive extraneous signal or the data that transmit, and the needed data in the external world are sent out, for example can obtain the power output of upper level amplifier by above-mentioned interface circuit, make above-mentioned control unit 1 can learn whether the upper level amplifier occurs being convenient to unusually judge whether to take measures or the like in the corresponding levels; Memory module 8 is used for the parameter and the result's of said process storage, and storage control unit 1 carries out the required program of parameter computing etc.In the present embodiment, above-mentioned each part all is arranged on the field programmable logic array (FPGA), therefore, even under the situation with a plurality of pump lasers or a plurality of raman amplifiers, above-mentioned power output monitoring means 2, pumping parameter monitoring unit 4 and pump power control unit 3 also can be connected with described control unit is parallel respectively; In addition, above-mentioned interface unit 7 is connected with above-mentioned control unit 1 with memory module 8.
Referring to Fig. 2, pumping parameter monitoring unit 4 comprises a plurality of subelements, even because a pump laser also needs to monitor its a plurality of parameters, these subelements do not link to each other each other mutually, but directly are connected between above-mentioned pump laser and the control unit 1.In the present embodiment, these subelements are laser power monitor subelement 41, temperature monitoring subelement 42 and operating current monitoring subelement 43, and above-mentioned each subelement is connected between pump laser and the control unit 1.The input of these subelements is connected to the corresponding monitoring side of above-mentioned pump laser, and its output is connected to the different data input pin of above-mentioned control unit 1.For example, output to the input of said temperature monitoring subelement 42 after the input of temperature monitoring subelement 42 is connected the temperature value output of pump laser or obtains the temperature value of this pump laser by external temperature sensor unit; The output of temperature monitoring subelement 42 is connected on the data input of above-mentioned control unit 1, and this data input pin is defined as the temperature input of this pump laser.In addition, further, above-mentioned each subelement all comprise the parameter that obtains parameter value by above-mentioned pump laser obtain the interface circuit (not shown), amplify first amplifier (as 421 among Fig. 2) that described parameter obtains the circuit output valve and with as described in amplifier (as 421 among Fig. 2) output valve carry out analog-to-digital conversion and output to the analog to digital conversion circuit (as 422 among Fig. 2) of above-mentioned control unit 1.In the present embodiment, the submodule of above-mentioned each pumping parameter monitoring unit 4 comprises that all above-mentioned parameter obtains interface circuit, amplifier and analog to digital conversion circuit.
In the present embodiment, above-mentioned pumping power control unit 3 comprises the D/A converting circuit 31 that the pump laser power control signal with 1 output of above-mentioned control unit carries out digital-to-analogue conversion, with second amplifier 32 of the described pump laser control end of described D/A converting circuit 31 outputs amplifying and be sent to.It is used for the power control signal that control unit 1 is exported with digital signal form is converted to the analog signal that is suitable for pump laser, the power of control pump laser.
In the present embodiment, pump laser can comprise a plurality of, and its output is pooled to optical fiber by wavelength division multiplexing.Fig. 2 shows the situation when having two pump lasers, what deserves to be mentioned is, each pump laser all has its corresponding pumping parameter monitoring unit 4 and pump power control unit 3 respectively, and each pumping parameter monitoring unit 4 all comprises each above-mentioned subelement.Simultaneously, no matter what pump lasers, the output or the input of its pumping parameter monitoring unit 4 (comprising a plurality of subelements) and pump power control unit 3 all are the different pieces of information I/O ends that is connected control unit 1 respectively.
Owing in optical fiber, there is the signal (particularly being a plurality of channels) of various wavelength, therefore, when the power output of monitoring raman amplifier, need its power of light independent measurement with above-mentioned various wavelength (channel), whether suitable with the gain of judging a certain channel.Therefore, in the present embodiment, power output monitoring means 2 comprises the coupler 21 that is taken out described optical signal power by described optical fiber place after compiling by wavelength division multiplexing in proportion, the Deplexing apparatus 22 that the described optical signal power of obtaining is separated by its channel, a plurality of photodetectors 23 that are connected to each channel output of described Deplexing apparatus and the light signal of its output are converted to the signal of telecommunication, is connected with 23 outputs of described photodetector respectively and with the channel amplifier 24 of this signal amplification, is connected and from its output, selects MUX 25 of output with described each channel amplifier 24 outputs, a plurality ofly export the channel power analog to digital conversion circuit 26 that is connected and its signal is carried out being transported to after the analog-to-digital conversion described control unit 1 with described MUX 25 respectively.In the present embodiment, as shown in Figure 2, photodetector 23 and channel amplifier 24 are respectively 8, and these photodetectors 23 and channel amplifier 24 are corresponding one by one, have what photodetectors 23 just to have the channel amplifier 24 of similar number to be connected with it respectively.And channel power analog to digital conversion circuit 26 is 2, and promptly above-mentioned MUX 25 is 8 to select 2 selector.In the present embodiment, the control unit 1 that is arranged so that of above-mentioned power output detecting unit 2 can be obtained the representative signal power value that has channel in the optical fiber, and it is judged, handles.Under special situation, can also obtain the signal power value of each channel or the signal power value of the more number of channel (for example 4 channels) respectively by the above-mentioned MUX 25 of control, be used to judge the output power value of raman amplifier.
In addition, in the present embodiment, interface unit 7 comprises RS232 interface 71 and the Ethernet interface 72 that is connected with described control unit 1 respectively; Also comprise the memory module 8 that is connected, is used to store data with described control unit 1, memory module 8 comprises flash memories 81, SRAM83 and the SDRAM 82 that is connected with described control unit 1 respectively.
In a word, in the present embodiment, as shown in Figure 2, the luminous power of pump laser group output realizes that through exporting by optical interface behind the wave multiplexer Raman amplifies, and the flashlight after the amplification is exported from wave multiplexer, 8 channels are arranged in the system, in the inboard of flashlight output optical interface, usage ratio coupler acquired signal luminous power obtains the detection limit of output signal luminous power.The pump laser group is by 2 laser constitutions, and 2 lasers are by linking to each other with the pumping drive circuit, and the pump laser group can be exported the laser emission that meets the demands when operate as normal.In power output monitoring means 2, comprise 8 tunnel photoelectric detector PD 1 to PD8,8 path channels amplifier circuit AMP1 to AMP8,8 select 2 MUX MUX8-2, channel A/D change-over circuit A/D1 and A/D2 etc.Photodetector 23 is generally photo-detector diode, and the detection limit of output signal luminous power is carried out opto-electronic conversion, forms analog electrical signal.Be input to then in the channel amplifier 24, carry out the AD conversion through exporting channel AD circuit 26 in process MUX 25 after suitably amplifying, detected value with digital signaling picked up signal power output, output to the control unit 1 among the FPGA, control unit 1 will be worth the reference quantity as the average power of light signal, in order to the current gain of computing amplifier.This partial function is finished the power monitoring function to flashlight.After the light signal average power of 1 pair of input of control unit is carried out computing, judge according to current gain value, configuration yield value, obtain parameters such as corresponding yield value and pump laser drive current, by D/A change-over circuit D/A14 and D/A24 and AMP14 and AMP24 driving, produce corresponding Raman gain, the pump laser that needs is carried out gain-adjusted gains and flat gain control automatically.Wherein AMP14 and AMP24 provide drive current for the pump laser group.As when needing the power output of control pump laser PUMP1, the output port of FPGA control D/A14 change-over circuit, to D/A14 change-over circuit dateout, through obtaining the analog operation electric current after the D/A conversion, again through delivering to the control end of pump PMUP1 behind the amplifier AMP14.
FPGA its peripheral FLASH, SRAM, SDRAM and the RS232 at above-mentioned control unit 1 place and ETHERNET input/output interface constitute a minimum control system, and each links to each other with control line by data wire between forming.Wherein FLASH can be used for storage hardware configuration and software program etc.SRAM can be used for the storage of the dynamic routine of FPGA running.SDRAM can be used for the buffer memory of calculating process parameter etc.RS232 can realize the interface of system and PC, is used for system is configured and functions such as parameter demonstration.The ETHERNET interface is used for from the parameters such as gain configuration of network transmitting-receiving far-end.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (9)
1. distributed raman amplifier control system based on field programmable logic array, it is characterized in that, comprise the power output monitoring means of monitoring described raman amplifier power output, obtain the pumping parameter monitoring unit of described raman amplifier pump laser parameter, control the pump power control unit of described pump laser power, the interface unit that is connected with the external world and receive union or handle described power monitoring unit, the signal of described pumping parameter monitoring unit and described interface unit output is also exported the control unit of control signal, described power output monitoring means, pumping parameter monitoring unit is connected with described control unit is parallel respectively with the pump power control unit; Described interface unit is connected with described control unit.
2. the distributed raman amplifier control system based on field programmable logic array according to claim 1, it is characterized in that, described pumping parameter monitoring unit comprises laser power monitor subelement, temperature monitoring subelement and operating current monitoring subelement, and described each subelement is connected between described pump laser and the described control unit.
3. the distributed raman amplifier control system based on field programmable logic array according to claim 2, it is characterized in that described each subelement comprises that the parameter that obtains parameter value by described pump laser obtains interface circuit, amplifies that described parameter obtains first amplifier of interface circuit output valve and described amplifier output valve carried out analog-to-digital conversion and output to the analog to digital conversion circuit of described control unit.
4. the distributed raman amplifier control system based on field programmable logic array according to claim 1, it is characterized in that, described pump power control unit comprises the D/A converting circuit that the pump laser power control signal with the output of described control unit carries out digital-to-analogue conversion, described D/A converting circuit output is amplified and is sent to second amplifier of described pump laser control end.
5. the distributed raman amplifier control system based on field programmable logic array according to claim 4 is characterized in that described pump laser comprises a plurality of, and its output is pooled to optical fiber by wavelength division multiplexing.
6. the distributed raman amplifier control system based on field programmable logic array according to claim 5, it is characterized in that, described power output monitoring means comprises the coupler that is taken out described optical signal power by described optical fiber place after compiling by wavelength division multiplexing in proportion, the Deplexing apparatus that the described optical signal power of obtaining is separated by its channel, a plurality of photodetectors that are connected to each channel output of described Deplexing apparatus and the light signal of its output are converted to the signal of telecommunication, is connected with the output of described photodetector respectively and with the channel amplifier of this signal amplification, is connected and from its output, selects MUX of output with described each channel amplifier output, a plurality ofly export the channel power analog to digital conversion circuit that is connected and its signal is carried out being transported to after the analog-to-digital conversion described control unit with described MUX respectively.
7. the distributed raman amplifier control system based on field programmable logic array according to claim 6, it is characterized in that, photodetector in the described power output monitoring means and channel amplifier are corresponding one by one and be respectively a plurality of, and its channel power analog to digital conversion circuit is at least one.
8. the distributed raman amplifier control system based on field programmable logic array according to claim 1 is characterized in that described interface unit comprises RS232 interface and the Ethernet interface that is connected with described control unit respectively.
9. the distributed raman amplifier control system based on field programmable logic array according to claim 8, it is characterized in that, also comprise the memory module that is connected, is used to store data and program with described control unit, described memory module comprises flash memories, SRAM and the SDRAM that is connected with described control unit respectively.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138842A (en) * | 2011-11-24 | 2013-06-05 | 昂纳信息技术（深圳）有限公司 | Power control device of multi-pumping raman optical fiber amplifier |
| CN107370014A (en) * | 2017-08-23 | 2017-11-21 | 深圳市杰普特光电股份有限公司 | A kind of laser control circuit and laser |
-
2010
- 2010-03-05 CN CN2010201245713U patent/CN201878152U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138842A (en) * | 2011-11-24 | 2013-06-05 | 昂纳信息技术（深圳）有限公司 | Power control device of multi-pumping raman optical fiber amplifier |
| CN107370014A (en) * | 2017-08-23 | 2017-11-21 | 深圳市杰普特光电股份有限公司 | A kind of laser control circuit and laser |
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Granted publication date: 20110622 Termination date: 20120305 |