CN204859187U - Take 100G light transceiver module of forward error correction function based on directly modulated laser instrument - Google Patents
Take 100G light transceiver module of forward error correction function based on directly modulated laser instrument Download PDFInfo
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Abstract
The utility model relates to a take the 100G light transceiver module based on DML of FEC function, including emission of light functional unit, light -receiving functional unit, control functional unit, wherein emission of light functional unit adds FEC coding information behind the signal of telecommunication of receiving CAUI or CAUI -4, and the drive DML change it to the light signal, light -receiving functional unit with the light signal received through dividing a wave rear to convert the signal of telecommunication into and carry out FEC and decode, deliver to CAUI or the CAUI -4 interface unit is exported after the multiplexer is multiplexing with the signal of telecommunication after recovering to decode. The utility model discloses a mode compensation DML of FEC encoding and decoding arouses that the channel SNR reduces the higher problem of well long distance transmission error code that leads to because the extinction ratio that the suppression chromatic dispersion caused diminishes, solves DML at the limited problem of 100G transmission distance, extension transmission distance. Compare and have higher cost advantage in current electric absorption modulated laser scheme.
Description
Technical field
The utility model relates to optical communication field, particularly relates to a kind of optical module meeting IEEE802.3ba Fast Ethernet standard, particularly a kind of 100G optical transceiver module based on directly modulation laser (DML) with FEC function.
Background technology
Along with the high speed development of IT industry, cloud computing, virtual, HD video, ecommerce, the continuing to bring out of the various emerging service such as social networks and fast wireless network, data bandwidth is had higher requirement, thus active demand is created to the Ethernet system of high speed low cost.At present, 100G optical transceiver module is being widely used and is disposing, for the transmission of higher rate provides efficient solutions.
According to IEEE802.3ba Fast Ethernet standard, the transmission range of 100GBASE-LR4 and 100GBASE-ER4 requires to reach 10KM and 40KM, 100G optical transceiver module based on above-mentioned two kinds of standards is mainly used in the transmission between metropolitan area network, and metropolitan area network is to the large usage quantity of 100G optical transceiver module, therefore comparatively responsive to cost.At present, the major part many employings of optical module manufacturer 4 groups of 25GEML are used as the semiconductor laser of the light emission component part of the 100G optical transceiver module based on this standard, it is good that this type laser has high speed performance, the advantage that dispersion penalty is low, but simultaneously also with the shortcoming that power consumption is high, cost is high, package dimension is large, thus it is comparatively large to cause the current 100G optical transceiver module based on above-mentioned two kinds of standards to there is power consumption, the problem that cost is higher.These bring larger cost increase all to the networking of operator.
Although existing directly modulation laser (DML) has low-power consumption, low cost, advantage that package dimension is little, if but adopt 25GDML to be used as light emission component semiconductor laser, the significantly fluctuation of active area charge carrier then can be caused when significantly modulating drive current, thus refractive index produces comparatively modulation, cause larger warbling, produce larger dispersion and cause larger intersymbol interference, the impact of centering long-distance transmissions is larger.If modulate by a small margin effectively can suppress chirp phenomenon to drive current, reduce dispersion to reduce intersymbol interference, but extinction ratio will reduce, and affects transmission channel signal to noise ratio thus causes system error code, can affect transmission range equally.These shortcomings limit the application of 25GDML in 100G middle and long distance transmission light transceiver module above.
Therefore, study a kind of lower cost and can meet the 100G optical transceiver module required in the application of middle and long distance Optical Fiber Transmission, there is the using value of reality.
Summary of the invention
The utility model proposes the implementation of a kind of FEC function based on the 100G optical transceiver module of DML, to solve the problem.Band FEC function described in the utility model is based on the 100G optical transceiver module of DML, compensate DML due to the extinction ratio suppressing dispersion and cause by using the mode of FEC encoding and decoding to diminish, the problem that the middle and long distance transmission error code causing channel SNRs to reduce to cause is higher, thus realize the application of DML in the transmission of 100G middle and long distance.This utility model effectively can solve the problem based on EML optical transceiver module high cost simultaneously.
Technical problem of the present utility model is solved by following technical scheme:
The utility model provides a kind of 100G optical transceiver module based on DML with FEC function, comprises emission function unit, light-receiving functional unit, controlling functions unit; Described emission function unit comprise be linked in sequence successively FEC coding unit, multi-group data clock recovery unit, organize laser drive unit, many groups of emitting modules based on 25GDML, optical multiplexers more; Described light-receiving functional unit comprise be linked in sequence fec decoder unit, multi-group data clock recovery unit, organize amplifying circuit more, organize optical fiber receive module, optical branching filter more; Described controlling functions unit is connected with described emission function unit and described light-receiving functional unit, controls and detect the operating state of described emission function unit and described light-receiving functional unit.
In technique scheme, the drive current that described laser drive unit exports makes to work in linear operating region based on the DML emitting module in the emitting module of 25GDML, reduces dispersion to suppress to warble thus reduces intersymbol interference.
In technique scheme, described controlling functions unit comprises temperature detection circuit, temperature-control circuit, memory circuit and microcontroller further, described temperature detection circuit is for detecting the described working temperature based on the DML emitting module in the emitting module of 25GDML, described temperature-control circuit is used for making described DML emitting module remain on optimum temperature point, the temperature feedback that described microcontroller detects according to described temperature detection circuit, the operating state of temperature-control circuit described in dynamic conditioning, described memory circuit is for storing the threshold current information of each DML emitting module, described microcontroller adjusts the drive current of described laser drive unit output according to described threshold current information, described DML emitting module is made to be operated in linear operating region.
In technique scheme, described FEC coding unit comprises demodulation multiplexer, 20 groups of FEC encoders, multiplexer compositions; Described demodulation multiplexer has two type 10:20 demodulation multiplexers and 4:20 demodulation multiplexer; Described multiplexer is 20:4 multiplexer.
In technique scheme, described fec decoder unit comprises multiplexer, 20 groups of FEC encoders, demodulation multiplexer compositions; Described multiplexer has two type 20:10 multiplexers and 20:4 multiplexer; Described demodulation multiplexer is 4:20 demodulation multiplexer.
In technique scheme, the multi-group data clock recovery unit that described emission function unit comprises is four groups, how group laser drive unit is four groups, the many groups emitting modules based on 25GDML is four groups; The multi-group data clock recovery unit that described light-receiving functional unit comprises is four groups, many group amplifying circuits are four groups, many group optical fiber receive modules are four groups.
In technique scheme, the described emitting module based on 25GDML meets the wave division multiplexing wavelength interval that IEEE802.3ba specifies, its centre wavelength is respectively 1295.56nm, 1300.05nm, 1304.58nm and 1309.14nm.
In technique scheme, described optical fiber receive module adopts PIN type diode array or avalanche photodiode array.
In technique scheme, described controlling functions unit comprises input and output logic control circuit, power-on time sequence control circuit, FEC codec state indicating circuit, digital-to-analogue and analog to digital conversion circuit further.
The utility model achieves following technique effect:
By the function of integrated FEC encoding and decoding, realize the application of 25GDML in the transmission of 100G middle and long distance, greatly reduce the cost of optical transceiver module, have economy.This technical scheme meets multiple 100G communication interface in addition, has flexibility, by adding FEC function, optical transceiver module overall performance is optimized.Integrate novelty, economy, practicality and creativeness, be applicable to large-scale production, meet the needs of middle and long distance transmission.
Accompanying drawing explanation
Fig. 1 is the utility model device internal structure functional block diagram;
Fig. 2 is the utility model FEC coding unit part-structure schematic diagram;
Fig. 3 is the utility model fec decoder cell mesh structural representation;
Fig. 4 is the utility model emission function cellular construction schematic diagram;
Fig. 5 is the mode that prior art drives DML emitting module;
Fig. 6 is the driving device structure schematic diagram that the utility model suppression DML warbles;
Fig. 7 is the application schematic diagram of a kind of point-to-point transmission in the utility model.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the utility model, below in conjunction with the drawings and the specific embodiments, the utility model being described in further detail.
The utility model provides a kind of 100G optical transceiver module based on DML with FEC function, comprises emission function unit 10, light-receiving functional unit 20 and controlling functions unit 30.Wherein Optical Transmit Unit 10 comprises many group FEC coding units 101, multi-group data clock recovery unit 102, many group laser drive unit 103, many groups of light emission components 104 based on 25GDML, optical multiplexers 105.Light-receiving functional unit 20 comprises many group fec decoder unit 201, multi-group data clock recovery unit 202, many group amplifying circuits 203, many group optical fiber receive modules 204, optical branching filter 205.Controlling functions unit 30 is connected with the input/output signal of optical transceiver module interface, receive the control information of optical transceiver module external control unit outside (not shown) input, and export the diagnostic message of optical transceiver module to external control unit outside, be connected with emission function unit 10 and light-receiving functional unit 20 simultaneously, control and detect the operating state of emission function unit 10 and light-receiving functional unit 20.
Below with reference to accompanying drawings, the embodiment of optical transceiver module described in the utility model is described further.
Fig. 1 shows a kind of with the specific embodiments of FEC function based on the 100G optical transceiver module of DML, comprises emission function unit 10, light-receiving functional unit 20 and control unit 30
Wherein emission function unit 10 comprises FEC coding unit 101, four groups of data clock recovery units 102, four groups of laser drive unit 103, four groups of light emission components 104 based on 25GDML, optical multiplexer 105.
Fig. 2 is the functional block diagram of FEC coding unit 101, FEC coding unit 101 for adding error correction coding information in the signal of telecommunication of 100G standard interface CAUI or CAUI-4, to reach in the transmission range because extending light signal when suppressing DML laser chirp to cause extinction ratio to reduce, improve error rate of system, elevator system reliability.FEC coding unit 101 comprises demodulation multiplexer 110, many group FEC encoders 111, multiplexer 112.Demodulation multiplexer 110 has two types, is respectively 10:20 demodulation multiplexer and 4:20 demodulation multiplexer, and 10:20 demodulation multiplexer is used for the signal of telecommunication of the ten road 10G speed of 100G standard interface CAUI to be demultiplexing as the 20 road 5G speed signals of telecommunication; 4:20 demodulation multiplexer is used for the four road 25G speed signals of telecommunication of 100G standard interface CAUI-4 to be demultiplexing as the 20 road 5G speed signals of telecommunication.Many groups FEC encoder is 20 groups, for adding FEC error correction coding information, provides the coding gain of about 6 ~ 9dB, to extend transmission distance.Multiplexer 112 is 20:4 multiplexer, for the signal of telecommunication of 20 road 5G speed being multiplexed with the signal of telecommunication of four road 25G speed.The signal of telecommunication to be sent enters demodulation multiplexer 110 by the signal of telecommunication of 100G standard interface CAUI or CAUI-4, data after demultiplexing enter many group FEC encoders 111 and add FEC coded message, then enter multiplexer 112 and are multiplexed with the 25G speed signal of telecommunication that four tunnels comprise FEC coded message and export.
Fig. 3 is the functional block diagram of fec decoder unit 201, and decoded transform electrical signals, for the signal of telecommunication comprising FEC coded message being carried out the recovery decoding of error code, is the signal of telecommunication of 100G standard interface by fec decoder unit 201 simultaneously.Fec decoder unit 201 comprises demodulation multiplexer 212, many group fec decoder devices 211, multiplexer 210.Demodulation multiplexer 212 is for being demultiplexing as the signal of telecommunication of 20 road 5G speed by the signal of telecommunication of four road 25G speed.Many groups fec decoder device 211 is 20 groups, for the signal of telecommunication comprising FEC coded message being carried out the recovery decoding of error code.Multiplexer 210 has two types, is respectively 20:10 multiplexer and 20:4 multiplexer, and 20:10 multiplexer is used for the signal of telecommunication decoded 20 road 5G speed signals of telecommunication of recovery being multiplexed with ten road 10G speed, is then exported by 100G standard interface CAUI; 20:4 multiplexer is used for the signal of telecommunication decoded 20 road 5G speed signals of telecommunication of recovery being multiplexed with four road 25G speed, is then exported by 100G standard interface CAUI-4.The signal of telecommunication comprising error correction coding information received enters the 4:20 demodulation multiplexer 212 of fec decoder unit front end with the electrical signal form of four road 25G speed, the signal of telecommunication being demultiplexing as 20 groups of 5G speed enters the recovery decoding that 20 groups of fec decoder devices 211 carry out error code, recover the decoded signal of telecommunication is multiplexed with ten road 10G or the four road 25G speed signal of telecommunication by the multiplexer 210 of 20:10 or 20:4, then carry out transmission by 100G standard interface CAUI or CAUI-4 and export.
Thus, the workflow of optical transceiver module described in the utility model is as follows.
Emission function unit 10 is used for receiving the signal of telecommunication from 100G standard interface CAUI or CAUI-4, by the demodulation multiplexer 110 of FEC coding unit 101 front end, by the four road 25G speed signals of telecommunication of the ten road 10G speed signals of telecommunication of CAUI interface or CAUI-4 interface, be demultiplexing as the 20 road 5G speed signals of telecommunication and enter 20 groups of FEC encoders 111 respectively, after adding error correction coding information respectively in the 20 road 5G speed signals of telecommunication by these 20 groups of FEC encoders 111, enter multiplexer 112 and be multiplexed with the signal of telecommunication of four road 25G rate packets containing error correction information, then sampling and buffered that four groups of data clock recovery units 102 carry out data clock is entered, the conditioning amplification process that the signal of telecommunication after process carries out signal by four groups of drive circuit for laser 103 is loaded on four groups of light emission components based on 25GDML, often the signal of telecommunication of input is converted to light signal and enters optical multiplexer 105 by group emitting module, after optical multiplexer 105, synthesize the 100G rate optical signal that a road comprises FEC coded message transfer to fibre circuit.
Light-receiving functional unit 20 receives and comprises the 100G rate optical signal of FEC coded message after optical branching filter 205 partial wave from fibre circuit, a received road light signal is divided into four road light signals, access four groups of optical fiber receive modules 204 respectively, often organize optical fiber receive module and light signal is converted to current signal, four road current signals through four groups of amplifying circuits 203 amplify respectively be converted into voltage signal after enter four groups of data clock recovery units 202, four groups of data clock recovery units 202 carry out synchronized sampling buffered, and the signal of telecommunication after process enters fec decoder unit 201.
In embodiment, four groups of optical fiber receive modules 204 can adopt PIN (PositiveintrinsicNegative) type diode array or avalanche photodiode array, adopt avalanche photodide sensitivity higher, are more conducive to long-distance transmissions.
In embodiment, controlling functions unit 30 accesses the input/output signal of optical transceiver module interface, receive the control information of optical transceiver module external control unit outside (not shown) input, export optical transceiver module diagnostic message to external control unit outside, also be connected with emission function unit 10 and light-receiving functional unit 20 simultaneously, control and detect the operating state of emission function unit 10 and receiving function unit 20.Controlling functions unit 30 comprises input and output logic control circuit, power-on time sequence control circuit, FEC codec state indicating circuit, temperature-control circuit, digital-to-analogue and analog to digital conversion circuit, memory circuit, and wherein memory circuit is used for storing firmware information, module information, user profile.
Light emission component 104 in the present embodiment adopts four groups of 25G speed directly modulation laser arrays, four groups of lasers meet the wave division multiplexing wavelength interval that IEEE802.3ba specifies, its centre wavelength is respectively 1295.56nm, 1300.05nm, 1304.58nm and 1309.14nm.
DML is compared to EML and has larger cost advantage, but in existing current-modulation process, in order to improve light signal extinction ratio many employings Fig. 5 shown in current driver mode, namely during zero-signal, drive current approximates the current value at threshold current point 40 place of DML, threshold current point 40 is a point on luminous power-current curve, and this point is between linear operating region 42 and laser shutdown region 41.When drive current 135 is carried on DML emitting module 131, drive current 135 is converted into light signal 134 and exports on optical fiber 132 by DML emitting module 131, due to DML laser 131 in the place's switching of threshold current point 40 to generate " 0 " and level"1" light signal 134, larger warbling will be caused, especially at level "0" place.These are warbled and can be superimposed on light signal 134, propagate on fibre circuit, cause wave distortion, cause intersymbol interference, affect transmission range by the optical multiplexer shown in Fig. 4.
The utility model is by the drive current of adjustment DML, control the linear operating region that operating current is operated in DML, dispersion is reduced to reduce intersymbol interference, because the suppression problem that caused extinction ratio slightly reduces of warbling is compensated by the mode of FEC encoding and decoding to suppress to warble.A kind of mode adjusting DML drive current that Fig. 6 is shown, comprises laser drive unit 130, DML emitting module 131, temperature detection circuit 301, temperature-control circuit (TEC) 302, memory circuit 303 and microcontroller 304.Wherein because the threshold current of DML emitting module increases with the rising of temperature, temperature-control circuit 302 is operated in optimum temperature point for keeping DML emitting module 131, temperature detection circuit 301 is for detecting the working temperature of DML emitting module 131, microcontroller 304 is according to the temperature feedback detected, the operating state of dynamic conditioning TEC302, memory circuit 303 is for memory module information, as the threshold current information of DML emitting module, microcontroller is according to the drive current of this threshold current information adjustment laser drive unit 130, DML emitting module 131 is made to be operated in linear operating region 240.Described linear operating region 240 is away from laser shutdown region, and the minimum current value namely in the scope of linear operating region 240 is obviously greater than the current value at threshold current point place.
Can effectively suppress warbling of DML emitting module by this mode, but extinction ratio slightly can reduce, about 1 ~ 2dB.Adopt the mode adding FEC coding/decoding information to compensate the phenomenon suppressing DML laser chirp to cause the reduction of extinction ratio, the coding gain of 6 ~ 9dB is about provided after adding FEC encoding and decoding, thus effectively extends transmission distance.
Below in conjunction with embodiment and Fig. 7, application scenarios of the present utility model is described further.
Fig. 7 describe a kind of use the utility model to provide there is FEC function carries out point-to-point communication a kind of application mode based on the 100G optical transceiver module of DML, comprise there is 100G standard interface CAUI or CAUI-4 the first main frame 500, first optical transceiver module 502, optical transport network 504, second optical transceiver module 506, there is second main frame 508 of 100G standard interface CAUI or CAUI-4.
The signal of telecommunication of 100G speed is sent to the first optical transceiver module 502 by 100G standard interface CAUI or CAUI-4 by the first main frame 500, first transceiver module 502 converts the electrical signal to light signal be sent to optical transport network 504 by adding FEC coded message, the recovery decoding that the signal of telecommunication carries out error code is converted to after second transceiver module 506 receives this light signal, decoded information transfers to the second main frame 508 by 100G standard interface CAUI or CAUI-4, completes transmission and the reception of data.The data that second main frame 508 sends out simultaneously are sent to the first main frame 500 by same mode, thus realize the mutually mutual of data.
Each functional unit in the utility model in embodiment can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Namely above-mentioned integrated unit can adopt the form of hardware to realize, and the form that hardware also can be adopted to add SFU software functional unit realizes.
Above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although be described in detail the utility model with reference to embodiment, but tackle understanding for those skilled in the art: it still can be modified to the technical scheme described in foregoing embodiments, can make a variety of changes the utility model in the form and details, it does not depart from the technology of this patent and spirit.
Claims (9)
1. the 100G optical transceiver module based on DML with FEC function, comprise emission function unit (10), light-receiving functional unit (20), controlling functions unit (30), is characterized in that:
Described emission function unit (10) comprise be linked in sequence successively FEC coding unit (101), multi-group data clock recovery unit (102), organize laser drive unit (103), many groups of emitting modules based on 25GDML (104), optical multiplexer (105) more;
Described light-receiving functional unit (20) comprise be linked in sequence fec decoder unit (201), multi-group data clock recovery unit (202), organize amplifying circuit (203) more, organize optical fiber receive module (204), optical branching filter (205) more;
Described controlling functions unit (30) is connected with described emission function unit (10) and described light-receiving functional unit (20), controls and detect the operating state of described emission function unit (10) and described light-receiving functional unit (20).
2. the 100G optical transceiver module based on DML of band FEC function as claimed in claim 1, it is characterized in that: the drive current that described laser drive unit (103) exports makes to work in linear operating region based on the DML emitting module in the emitting module (104) of 25GDML, reduce dispersion to suppress to warble thus reduce intersymbol interference.
3. the 100G optical transceiver module based on DML of band FEC function as claimed in claim 2, is characterized in that: described controlling functions unit (30) comprises temperature detection circuit (301), temperature-control circuit (302), memory circuit (303) and microcontroller (304) further, described temperature detection circuit (301) is for detecting the described working temperature based on the DML emitting module in the emitting module (104) of 25GDML, described temperature-control circuit (302) remains on optimum temperature point for making described DML emitting module, the temperature feedback that described microcontroller (304) detects according to described temperature detection circuit (301), the operating state of temperature-control circuit described in dynamic conditioning (302), described memory circuit (303) is for storing the threshold current information of each DML emitting module, described microcontroller (304) adjusts according to described threshold current information the drive current that described laser drive unit (103) exports, described DML emitting module (131) is made to be operated in linear operating region (240).
4. the 100G optical transceiver module based on DML of band FEC function as claimed in claim 1, is characterized in that: described FEC coding unit (101) comprises demodulation multiplexer (110), 20 groups of FEC encoders (111), multiplexers (112) form; Described demodulation multiplexer (110) has two type 10:20 demodulation multiplexers and 4:20 demodulation multiplexer; Described multiplexer (112) is 20:4 multiplexer.
5. the 100G optical transceiver module based on DML of band FEC function as claimed in claim 1, is characterized in that: described fec decoder unit (201) comprises multiplexer (210), 20 groups of FEC encoders (211), demodulation multiplexers (212) form; Described multiplexer (210) has two type 20:10 multiplexers and 20:4 multiplexer; Described demodulation multiplexer (212) is 4:20 demodulation multiplexer.
6. the 100G optical transceiver module based on DML of band FEC function as claimed in claim 1, is characterized in that: the multi-group data clock recovery unit (102) that described emission function unit (10) comprises is four groups, organize laser drive unit (103) more be four groups, the many groups emitting modules based on 25GDML (104) is four groups; The multi-group data clock recovery unit (202) that described light-receiving functional unit (20) comprises is four groups, organize that amplifying circuit (203) is four groups, to organize optical fiber receive module (204) be four groups more more.
7. the 100G optical transceiver module based on DML of the band FEC function according to any one of claim 1-6, it is characterized in that: the described emitting module based on 25GDML (104) meets the wave division multiplexing wavelength interval that IEEE802.3ba specifies, its centre wavelength is respectively 1295.56nm, 1300.05nm, 1304.58nm and 1309.14nm.
8. the 100G optical transceiver module based on DML of the band FEC function according to any one of claim 1-7, is characterized in that: described optical fiber receive module (204) adopts PIN type diode array or avalanche photodiode array.
9. the 100G optical transceiver module based on DML of the band FEC function according to any one of claim 1-8, is characterized in that: described controlling functions unit (30) comprises input and output logic control circuit, power-on time sequence control circuit, FEC codec state indicating circuit, digital-to-analogue and analog to digital conversion circuit further.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105187128A (en) * | 2015-08-31 | 2015-12-23 | 武汉光迅科技股份有限公司 | 100G optical transceiver module with forward error correction function and based on direct modulation laser |
| WO2017107218A1 (en) * | 2015-12-24 | 2017-06-29 | 武汉光迅科技股份有限公司 | 2x100g optical transceiver module |
| CN109951232A (en) * | 2019-02-26 | 2019-06-28 | 武汉电信器件有限公司 | The implementation method of the pluggable CFP optical module device of outline packages and CFP optical module |
| WO2019242590A1 (en) * | 2018-06-21 | 2019-12-26 | 华为技术有限公司 | Optical network apparatus and optical module |
-
2015
- 2015-08-31 CN CN201520669595.XU patent/CN204859187U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105187128A (en) * | 2015-08-31 | 2015-12-23 | 武汉光迅科技股份有限公司 | 100G optical transceiver module with forward error correction function and based on direct modulation laser |
| WO2017107218A1 (en) * | 2015-12-24 | 2017-06-29 | 武汉光迅科技股份有限公司 | 2x100g optical transceiver module |
| WO2019242590A1 (en) * | 2018-06-21 | 2019-12-26 | 华为技术有限公司 | Optical network apparatus and optical module |
| US11563494B2 (en) | 2018-06-21 | 2023-01-24 | Huawei Technologies Co., Ltd. | Optical network apparatus and optical module |
| CN109951232A (en) * | 2019-02-26 | 2019-06-28 | 武汉电信器件有限公司 | The implementation method of the pluggable CFP optical module device of outline packages and CFP optical module |
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