CN206820758U - A kind of photoelectric conversion device based on QSFP28 optical modules - Google Patents
A kind of photoelectric conversion device based on QSFP28 optical modules Download PDFInfo
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- CN206820758U CN206820758U CN201720398590.7U CN201720398590U CN206820758U CN 206820758 U CN206820758 U CN 206820758U CN 201720398590 U CN201720398590 U CN 201720398590U CN 206820758 U CN206820758 U CN 206820758U
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- laser
- photoelectric conversion
- optical modules
- data recovery
- conversion device
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Abstract
A kind of photoelectric conversion device based on QSFP28 optical modules is the utility model is related to, the photoelectric conversion device includes：Signal input apparatus, emitter, reception device and control device；Emitter includes clock data recovery circuit, laser driver, semiconductor laser and the wavelength-division multiplex wave multiplexer being sequentially connected；Reception device includes Wavelength division multiplexer/demultiplexer, photodetector, the second clock data recovery circuit being sequentially connected；Limiting amplifier is integrated in second clock data recovery circuit；Control device includes：Processor and control circuit.The utility model is not in the case where influenceing existing 10G network frames, 40/100G networks are arrived into the lifting of 10G networks, pass through clock data recovery circuit simultaneously, improve its transmission performance and transmission range, it is different due to the Slop efficiency meeting variation with temperature of semiconductor laser, realize the automated power control of noise spectra of semiconductor lasers come the average light power of stable laser by processor and control circuit.
Description
Technical field
It the utility model is related to optical module receive-transmit system, more particularly to a kind of opto-electronic conversion dress based on QSFP28 optical modules
Put.
Background technology
With the growth of network bandwidth, 10G speed can not meet the transmission requirement of communication data, telecommunications network and data
100G transmission rates become inevitable solution in the application networks such as center.First generation 100G optical modules are CFP optical modules,
Volume is very big, and transmission range is also very short, CFP2 and CFP4 optical modules then occurs, and wherein CFP4 optical modules are current
100G optical modules of latest generation, but volume is still very big, also do not solve the problem of transmission range, volume causes more greatly optical mode
The port density of block on switches is smaller.And join the short distance such as port and cloud computation data center data exchange over an access network
From in transmission, 100G parallel optical modules need onboard data selector and shunt, and this make it that cost is higher, integrated data selection
Although the device long transmission distance of device and shunt, complex process, and reliability is not high.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of photoelectric conversion device, solves light in the prior art
The problems such as module volume is big, complicated and cost is higher.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：A kind of photoelectricity based on QSFP28 optical modules turns
Changing device, including：Signal input apparatus, emitter, reception device and control device；The emitter includes being sequentially connected
Clock data recovery circuit, laser driver, semiconductor laser and wavelength-division multiplex wave multiplexer；The signal input apparatus
Electrically connected with the timing recovery circuit；The reception device includes Wavelength division multiplexer/demultiplexer, the photodetection being sequentially connected
Device, second clock data recovery circuit；Limiting amplifier is integrated in the second clock data recovery circuit；Control device bag
Include：Processor and control circuit；The processor is connected with emitter and reception device respectively by control circuit.
The beneficial effects of the utility model are：The utility model, will in the case where not influenceing existing 10G network frames
40/100G networks are arrived in the lifting of 10G networks, while by clock data recovery circuit, improve its transmission performance and transmission range, by
It is different in the Slop efficiency meeting variation with temperature of semiconductor laser, realized by processor and control circuit and semiconductor is swashed
The automated power control of light device carrys out the average light power of stable laser.
On the basis of above-mentioned technical proposal, the utility model can also do following improvement.
Further, the control device also includes：Extinction ratio compensation circuit, the processor pass through extinction ratio compensation circuit
It is connected with the semiconductor laser.
It is using the above-mentioned further beneficial effect of scheme：Because the Slop efficiency of semiconductor laser can variation with temperature
And it is different, so needing extinction ratio compensation circuit to realize stable laser average light power.
Further, the semiconductor laser is directly modulated laser；The photodetector includes：Photoelectricity
Diode and trans-impedance amplifier；The Wavelength division multiplexer/demultiplexer, photodiode and trans-impedance amplifier are sequentially connected.
It is using the above-mentioned further beneficial effect of scheme：Directly modulated laser is used to improve optical signal
Transmission range；And integrated photodiode and trans-impedance amplifier in photodetector, the optical signal received is converted into electricity
Signal, and be amplified, because the electric signal of photodiode conversion is very faint, first it is amplified, avoids electric signal transmission
During loss cause information to lose.
Further, the control circuit is I2C bus circuits, and the I2C bus circuits are by data wire and clock cable
Form.
It is using the above-mentioned further beneficial effect of scheme：It is attached using I2C bus circuits, I2C bus circuits tool
There is interface line few, the advantages that control mode is simple, and device packing forms are small, and traffic rate is higher.
Further, it is provided with photodiode in the semiconductor laser；The photodiode and the processor
Electrical connection.
It is using the above-mentioned further beneficial effect of scheme：Photodiode is set in semiconductor laser, for examining
The optical output power size of laser is surveyed, and the output power value that photodiode is detected is sent to processor, processor
The size of laser driver adjustment bias current is controlled by control circuit, with the luminous power of steady laser.
Further, the processor is also connected with I2C communication interfaces；And led to by the I2C communication interfaces with host computer
Letter connection.
It is using the above-mentioned further beneficial effect of scheme：Processor is with by I2C bus circuits and emitter and connecing
Each part in receiving apparatus is attached, and is detected the voltage of each part, temperature, laser bias current, input optical power and is connect
Luminous power is received, and is communicated to connect by I2C communication interfaces and host computer, the parameters detected are reported into host computer, on
Position machine is controlled by the connection with processor according to parameter values to each part in emitter and reception device.
Further, the communication connection includes：Wireless connection or wired connection.
Further, the clock data recovery circuit sets 4 tunnels；The laser driver and the semiconductor laser
4 groups are respectively provided with, is all connected with one group of laser driver and semiconductor laser successively connecting per road clock data recovery circuit
Connect；The photodetector sets 4 groups；Second clock data recovery circuit sets 4 tunnels, and every group of photodetector is all connected with all the way
Second clock data recovery circuit.
Further, the scope of the optical maser wavelength of the semiconductor laser is：1290 nanometers -1310 nanometers.
It is using the above-mentioned further beneficial effect of scheme：It is transmitted, is reduced by the longer laser of launch wavelength
The loss of laser, improve efficiency of transmission.
Brief description of the drawings
Fig. 1 is a kind of photoelectric conversion device structure signal based on QSFP28 optical modules that the utility model embodiment provides
Figure；
Fig. 2 is a kind of photoelectric conversion device based on QSFP28 optical modules that the utility model another kind embodiment provides
Processor, extinction ratio compensation circuit and semiconductor laser connection diagram；
Fig. 3 is a kind of photoelectric conversion device knot based on QSFP28 optical modules that the utility model another kind embodiment provides
Structure schematic diagram one；
Fig. 4 is a kind of photoelectric conversion device knot based on QSFP28 optical modules that the utility model another kind embodiment provides
Structure schematic diagram secondly；
Fig. 5 is a kind of photoelectric conversion device based on QSFP28 optical modules that the utility model another kind embodiment provides
Laser driver and semiconductor laser circuit connection diagram；
Fig. 6 is a kind of photoelectric conversion device based on QSFP28 optical modules that the utility model another kind embodiment provides
Wavelength division multiplexer/demultiplexer and photo-detector circuit connection diagram.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, laser driver, 2, semiconductor laser, 3, Wavelength division multiplexer/demultiplexer, 4, photodiode, 5, across resistance
Amplifier.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit the scope of the utility model.
As shown in figure 1, a kind of photoelectric conversion device based on QSFP28 optical modules, including：Signal input apparatus, transmitting dress
Put, reception device and control device；Clock data recovery circuit that emitter includes being sequentially connected, laser driver 1, half
Conductor laser 2 and wavelength-division multiplex wave multiplexer；Signal input apparatus electrically connects with timing recovery circuit；Reception device is included successively
Wavelength division multiplexer/demultiplexer 3, photodetector, the second clock data recovery circuit of connection；Second clock data recovery circuit
In integrate limiting amplifier；Control device includes：Processor and control circuit；Processor by control circuit respectively with transmitting
Device connects with reception device.
In above-described embodiment, signal input apparatus, for producing differential electric signal, and emitter is sent to；Clock number
According to restoring circuit, laser driver is sent to for carrying out processing to differential electric signal, specifically, clock data recovery circuit carries
Take clock signal and recover signal, decision value is established so as to data recovery and export to sending the differential electric signal come in dynamic；
Laser driver 1, bias current and modulation electricity are provided for semiconductor laser 2 for the differential electric signal by receiving
Stream；Semiconductor laser 2, for sending the laser signal with modulated signal by bias current and modulation electric current；Wavelength-division is answered
With wave multiplexer, for laser signal to be combined into beam of laser signal output；Wavelength division multiplexer/demultiplexer 3, for by beam of laser
Signal is divided into the laser signal of multichannel different wave length；Photodetector is used to laser signal being converted into electric signal；Limited range enlargement
Device, for electric signal power to be amplified step by step, the excessively faint loss for causing transmitting procedure of electric signal is avoided to cause information
Lose；Second clock data recovery circuit is used for the clock signal for extracting electric signal and recovers signal, and the signal received is moved
State establishes decision value so as to data recovery and export；Processor, it is connected, is carried with emitter and reception device by control circuit
The digital information of emitter and reception device all parts corresponding port is taken to realize to the voltage of each passage, temperature, laser
Device bias current, input optical power and received optical power real-time monitoring and report.
As shown in Figure 2, it is preferred that control device also includes：Extinction ratio compensation circuit, processor compensate electricity by extinction ratio
Road is connected with semiconductor laser 2, different due to the Slop efficiency meeting variation with temperature of semiconductor laser 2, in processor
The optical power value of the laser of laser transmitting is provided with, and stable laser average light is realized by extinction ratio compensation circuit
Power.
The package size of QSFP28 optical modules is smaller than 100G CFP4 optical modules, it means that QSFP28 optical modules are being handed over
Changing planes above has higher port density.It can realize 100Gbit/s transmission networks using 100Gbit/s single channel physical-layer techniques
Network.It is under the limitation of the space of 1U panels for the maximum advantage that data center operator is brought, bandwidth and end can be maximized
Mouth density, U represent server size, and 1U is equal to 44.5 millimeters, and pitch-row is 470 millimeters.
As shown in Figure 3, it is preferred that semiconductor laser 2 is directly modulated laser 2；Photodetector includes：
Photodiode 4 and trans-impedance amplifier 5；Wavelength division multiplexer/demultiplexer, photodiode and trans-impedance amplifier are sequentially connected, directly
The transmission range of laser of laser transmitting can effectively be improved by connecing semiconductor laser modulation 2；Pass through light in reception device
Electric diode 4, which is realized, is converted into electric signal to laser signal, but the intensity of the electric signal is very faint, passes through trans-impedance amplifier
5 pairs its amplified in advance, prevent the electric signal transmission when loss cause information to be lost.
Preferably, control circuit is I2C bus circuits, and I2C bus circuits are made up of data wire and clock cable, is used
I2C bus circuits are attached, and I2C bus circuits have interface line few, and control mode is simple, and device packing forms are small, communication
The advantages that speed is higher, processor is improved to emitter and the receiving efficiency of reception device, and then improve treatment effeciency.
Preferably, it is provided with photodiode 4 in semiconductor laser 2；Photodiode 4 electrically connects with processor,
Setting photodiode 4 in semiconductor laser 2, the power output size of the laser signal of real-time detection laser transmitting, and
It is sent in processor, processor controls laser driver adjustment defeated by judging watt level, by control circuit
The bias current size gone out, realize the Power Control of the output laser signal of noise spectra of semiconductor lasers 2.
As shown in Figure 4, it is preferred that processor is also connected with I2C communication interfaces；And pass through I2C communication interfaces and host computer
Communication connection, for processor with being attached by I2C bus circuits and each part in emitter and reception device, detection is each
Voltage, temperature, laser bias current, input optical power and the received optical power of part, and by I2C communication interfaces with it is upper
Machine communicates to connect, and the parameters detected is reported into host computer, host computer is by the connection with processor according to parameter number
Value is controlled to each part in emitter and reception device.
Preferably, communication connection includes：Wireless connection or wired connection.
Preferably, clock data recovery circuit sets 4 tunnels；As shown in figure 5, laser driver and semiconductor laser electricity
Road connection diagram, laser driver and semiconductor laser are respectively provided with 4 groups, are all connected with per road clock data recovery circuit
It is sequentially connected with one group of laser driver and semiconductor laser；Photodetector sets 4 groups；Second clock data recovery electricity
Road sets 4 tunnels, and every group of photodetector is all connected with second clock data recovery circuit all the way, and photodetector includes：Photoelectricity two
Pole pipe 4 and trans-impedance amplifier 5；Second clock data recovery circuit sets 4 tunnels, and peripheral circuit all sets ground connection in figure, on circuit
Electrostatic and redundant current be released to the earth, reduce the injury to personnel, play a part of voltage stabilizing, and then avoid device power ripple
Device temperature caused by dynamic is too high.
Preferably, the scope for the optical maser wavelength that semiconductor laser 2 is launched is：1290 nanometers -1310 nanometers, specifically, 4
The wavelength of group laser is 1296 nanometers, 1300 nanometers, 1305 nanometers and 1309 nanometers.
Embodiment：Signal input apparatus inputs 4 pairs of 28Gbit/s differential electric signals by clock data recovery circuit whole
After shape and timing, received by laser driving circuit, driving laser sends the 4 road different wave lengths with data modulated signal
Laser, then 4 road optical signals are combined into by wavelength-division multiplex wave multiplexer and exported all the way.Receiving unit is by detector, limited range enlargement
Device and ce circuit composition.In view of transmission loss, 28Gbit/s signal transmission rates are generally calculated by 25Gbit/s；Filled receiving
In putting, the 25Gbit/s laser that 100Gbit/s laser signals all the way are divided into 4 road different wave lengths by Wavelength division multiplexer/demultiplexer 3 is believed
Number, and the faint electric signal in 4 roads is converted thereof into by detector, faint electric signal first passes around trans-impedance amplifier 5 and amplified,
Then received by limiting amplifier and the signal after amplifying to trans-impedance amplifier 5 carries out two level amplification, electric signal is exported, so as to complete
Changed into optical electrical.
Preferred embodiment of the present utility model is these are only, it is all in the utility model not to limit the utility model
Spirit and principle within, any modification, equivalent substitution and improvements made etc., should be included in protection model of the present utility model
Within enclosing.
Claims (9)
- A kind of 1. photoelectric conversion device based on QSFP28 optical modules, it is characterised in that including：Signal input apparatus, transmitting dress Put, reception device and control device；The emitter includes clock data recovery circuit, the laser driving being sequentially connected Device, semiconductor laser and wavelength-division multiplex wave multiplexer；The signal input apparatus electrically connects with the clock recovery circuitry；It is described Reception device includes Wavelength division multiplexer/demultiplexer, photodetector, the second clock data recovery circuit being sequentially connected；It is described Limiting amplifier is integrated in second clock data recovery circuit；Control device includes：Processor and control circuit；The processing Device is connected with emitter and reception device respectively by control circuit.
- A kind of 2. photoelectric conversion device based on QSFP28 optical modules according to claim 1, it is characterised in that the control Device processed also includes：Extinction ratio compensation circuit, the processor are connected by extinction ratio compensation circuit and the semiconductor laser Connect.
- 3. a kind of photoelectric conversion device based on QSFP28 optical modules according to claim 1, it is characterised in that described half Conductor laser is directly modulated laser；The photodetector includes：Photodiode and trans-impedance amplifier；Institute Wavelength division multiplexer/demultiplexer, photodiode and trans-impedance amplifier is stated to be sequentially connected.
- A kind of 4. photoelectric conversion device based on QSFP28 optical modules according to claim 1, it is characterised in that the control Circuit processed is I2C bus circuits, and the I2C bus circuits are made up of data wire and clock cable.
- 5. a kind of photoelectric conversion device based on QSFP28 optical modules according to claim 1, it is characterised in that described half Photodiode is provided with conductor laser；The photodiode electrically connects with the processor.
- 6. a kind of photoelectric conversion device based on QSFP28 optical modules according to any one of claim 1-5, its feature It is, the processor is also connected with I2C communication interfaces；And communicated to connect by the I2C communication interfaces and host computer.
- 7. a kind of photoelectric conversion device based on QSFP28 optical modules according to claim 6, it is characterised in that described logical Letter connection includes：Wireless connection or wired connection.
- 8. a kind of photoelectric conversion device based on QSFP28 optical modules according to any one of claim 1-5, its feature It is, the clock data recovery circuit sets 4 tunnels；The laser driver and the semiconductor laser are respectively provided with 4 groups, It is all connected with being sequentially connected with one group of laser driver and semiconductor laser per road clock data recovery circuit；The photoelectricity Detector sets 4 groups；Second clock data recovery circuit sets 4 tunnels, and every group of photodetector is all connected with second clock number all the way According to restoring circuit.
- 9. a kind of photoelectric conversion device based on QSFP28 optical modules according to claim 8, it is characterised in that described half The scope of optical maser wavelength of conductor laser transmitting is：1290 nanometers -1310 nanometers.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106899352A (en) * | 2017-04-17 | 2017-06-27 | 武汉飞鹏光科技有限公司 | A kind of photoelectric conversion device based on QSFP28 optical modules |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106899352A (en) * | 2017-04-17 | 2017-06-27 | 武汉飞鹏光科技有限公司 | A kind of photoelectric conversion device based on QSFP28 optical modules |
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