WO2016095715A1 - 一种光收发模块及实现方法 - Google Patents

一种光收发模块及实现方法 Download PDF

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Publication number
WO2016095715A1
WO2016095715A1 PCT/CN2015/096550 CN2015096550W WO2016095715A1 WO 2016095715 A1 WO2016095715 A1 WO 2016095715A1 CN 2015096550 W CN2015096550 W CN 2015096550W WO 2016095715 A1 WO2016095715 A1 WO 2016095715A1
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signal
output
optical
protection
channel
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PCT/CN2015/096550
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English (en)
French (fr)
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秦永兵
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40—Transceivers

Definitions

  • This application relates to, but is not limited to, the field of optical communication technology.
  • a related art 100G optical transceiver module for example, a CFP (Centum Form-factor Pluggable, 100G pluggable package) optical module usually includes the following components: a laser, a detector, a driving circuit, a control circuit, a rate converter (Gearbox), and light. Multiplexer/demultiplexer, etc.
  • a protection function for example, 1+1 protection, etc.
  • the protection response is slow and the switching time of protection switching is longer, which increases the complexity of the board.
  • the invention provides an optical transceiver module and an implementation method thereof, which can implement a protection function inside the optical transceiver module, reduce the size of the board, improve the integration degree, and shorten the switching response time.
  • An optical transceiver module includes:
  • the receiving side optical signal processing unit is configured to: receive the optical signals of the working channel and the protection channel, convert the electrical signals into electrical signals, and output the signals to the multiple selection unit;
  • the multi-channel selection unit is configured to: receive an electrical signal of the working channel and the protection channel, and select an electrical signal of the working channel or the protection channel as an output;
  • the receiving side electrical signal processing unit is configured to: process and output the electrical signal output by the multiple selection unit;
  • the transmitting side electrical signal processing unit is configured to: process the electrical signal to be sent by the transmitting side and output the signal to the transmitting side optical signal processing unit;
  • the transmitting side optical signal processing unit is configured to: receive an electrical signal output by the transmitting side electrical signal processing unit, generate a working channel optical signal and a protection channel optical signal according to the electrical signal, and output the same.
  • the optical transceiver module further includes the following features:
  • the multiplex selection unit includes one or more multiplex circuits
  • the two-selection circuit includes an input unit, a control unit, and an output unit;
  • the input unit is configured to: receive electrical signals of the working channel and the protection channel;
  • the control unit is configured to: determine whether the protection switching condition is satisfied, and output a control signal to the output unit according to the determination result;
  • the output unit is configured to: select an electrical signal of the working channel or the protection channel as an output according to the control signal.
  • the optical transceiver module further includes the following features:
  • the control unit is set to:
  • the control signal is output to the output unit, and the control signal instructs the output unit to select the power of the working channel.
  • Signal as an output
  • the control signal is output to the output unit, and the control signal instructs the output unit to select the electrical signal of the protection channel as Output.
  • the optical transceiver module further includes the following features:
  • the control unit is set to:
  • a control signal is output to the output unit, the control signal instructing the output unit to select an electrical signal of the working channel as an output.
  • the optical transceiver module further includes the following features:
  • the receiving side electrical signal processing unit includes one or more serially connected transimpedance amplifiers, a limiting amplifier, and a clock data recovery device;
  • the transimpedance amplifier is configured to: receive a current signal output by the multiple selection unit, convert the current signal into a voltage signal, and output the signal to a limiting amplifier;
  • the limiting amplifier is configured to: receive a voltage signal output by the transimpedance amplifier, perform equal-amplitude amplification and shaping, and output the signal to the first clock recovery device;
  • the first clock recovery device is configured to receive an electrical signal output by the limiting amplifier, perform timing and regeneration processing, and output the signal to a downstream device.
  • the optical transceiver module further includes the following features:
  • the first clock recovery device is further configured to output a lock alarm signal when the received signal lock fails.
  • the optical transceiver module further includes the following features:
  • the receiving side optical signal processing unit includes an optical demultiplexer and a photodetector
  • the optical demultiplexer is configured to: receive signals from an optical fiber, and demultiplex optical signals of different wavelengths, and output the signals to the photodetectors;
  • the photodetector is configured to receive an optical signal and convert it into an electrical signal for output to the multiple selection unit.
  • the optical transceiver module further includes the following features:
  • the receiving side optical signal processing unit includes an optical demultiplexer, a photodetector, and a transimpedance amplifier;
  • the optical demultiplexer is configured to: receive signals from an optical fiber, and demultiplex optical signals of different wavelengths, and output the signals to the photodetectors;
  • the photodetector is configured to: receive an optical signal, convert it into a current signal, and output it to the transimpedance Large
  • the transimpedance amplifier is configured to receive a current signal, convert the current signal into a voltage signal, and output the signal to the multiple selection unit.
  • the optical transceiver module further includes the following features:
  • the transmitting-side electrical signal processing unit includes one or more equal-connected equalizers and a second clock recovery device;
  • the equalizer is configured to: perform equalization processing on an electrical signal to be sent by the transmitting side, and output the signal to the clock recovery device;
  • the second clock recovery device is configured to: receive an electrical signal output by the equalizer, perform timing and regeneration processing, and output the signal to the transmitting side optical signal processing unit.
  • the optical transceiver module further includes the following features:
  • the transmitting side optical signal processing unit includes one or more channels of one drive two circuits, one or more sets of lasers and an optical multiplexer connected in sequence;
  • the one-drive two circuit is configured to: drive a group of lasers according to the received one-way electrical signal; any group of lasers includes two lasers;
  • the laser group is configured to generate a group of optical signals having different wavelengths carrying the same data, wherein one optical signal serves as a working channel and the other optical signal serves as a protection channel;
  • the optical multiplexer is configured to multiplex optical signals generated by each group of lasers.
  • the optical transceiver module further includes the following features:
  • the optical transceiver module is a CFP module.
  • An implementation method of an optical transceiver module includes:
  • the electrical signal to be transmitted is processed, and the working channel optical signal and the protection channel optical signal are generated and output.
  • the selecting an electrical signal of the working channel or the protection channel includes:
  • the determining whether the protection switching condition is satisfied, and selecting the electrical signal of the working channel or the protection channel according to the determination result includes:
  • the electrical signal of the working channel is selected
  • the electrical signal of the protection channel is selected
  • a computer readable storage medium storing computer executable instructions for performing the method of any of the above.
  • an optical transceiver module drives a plurality of lasers by using a driver on a transmitting side of an optical transceiver module, and selects a working channel and a protection channel by using a multi-select circuit on the receiving side, thereby
  • the optical path protection function is implemented in the optical transceiver module, which reduces the size of the board, improves the integration degree, and shortens the switching response time.
  • FIG. 1 is a schematic structural diagram of an optical transceiver module according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of an optical transceiver module (100G CFP module) according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a second-choice circuit in the 100G CFP module shown in FIG. 2.
  • FIG. 4 is a schematic diagram of a first drive two circuit in the 100G CFP module shown in FIG. 2;
  • FIG. 5 is a flowchart of a receiving side in an implementation method of an optical transceiver module according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a transmitting side in an implementation method of an optical transceiver module according to an embodiment of the present invention.
  • an embodiment of the present invention provides an optical transceiver module, including:
  • the receiving side optical signal processing unit 111 is configured to: receive the optical signal of the working channel and the protection channel, convert it into an electrical signal and output it to the multiplexing unit 112;
  • the multiple selection unit 112 is configured to: receive an electrical signal of the working channel and the protection channel, and select an electrical signal of the working channel or the protection channel as an output;
  • the receiving side electrical signal processing unit 113 is configured to: process and output the electrical signal output by the multiplexing unit 112;
  • the transmitting side electrical signal processing unit 121 is configured to: process the electrical signal to be sent by the transmitting side and output it to the transmitting side optical signal processing unit 122;
  • the transmitting side optical signal processing unit 122 is configured to receive an electrical signal output by the transmitting side electrical signal processing unit 121, and generate and output a working channel optical signal and a protection channel optical signal according to the electrical signal.
  • the optical transceiver module may further include the following features:
  • the optical transceiver module is a CFP module.
  • the multiple selection unit 121 includes one or more multiple selection circuits
  • the multiple selection circuit may be a second selection circuit
  • the two-selection circuit includes an input unit, a control unit, and an output unit;
  • the input unit is configured to: receive electrical signals of the working channel and the protection channel;
  • the control unit is configured to: determine whether the protection switching condition is satisfied, and output a control signal to the output unit according to the determination result;
  • the output unit is configured to: select an electrical signal of the working channel or the protection channel as an output according to the control signal.
  • control unit is set to:
  • the control signal is output to the output unit, and the control signal instructs the output unit to select the power of the working channel.
  • Signal as an output
  • the control signal is output to the output unit, and the control signal instructs the output unit to select the electrical signal of the protection channel as Output;
  • a control signal is output to the output unit, the control signal instructing the output unit to select an electrical signal of the working channel as an output.
  • the receiving side electrical signal processing unit 113 includes one or more Transimpedance Amplifiers (TIAs), Limiting Amplifiers (LIAs), and Clock Data Recovery (CDRs). ) device;
  • TIAs Transimpedance Amplifiers
  • LIAs Limiting Amplifiers
  • CDRs Clock Data Recovery
  • the transimpedance amplifier is configured to receive a current signal output by the multiple selection unit 112, convert the current signal into a voltage signal, and output the signal to a limiting amplifier;
  • the limiting amplifier is configured to: receive a voltage signal output by the transimpedance amplifier, perform equal-amplitude amplification and shaping, and output the signal to the first clock recovery device;
  • the first clock recovery device is configured to receive an electrical signal output by the limiting amplifier, perform timing and regeneration processing, and output the signal to a downstream device.
  • the first clock recovery device is further configured to output a lock alarm signal when the received signal lock fails.
  • the receiving side optical signal processing unit 111 may include an optical demultiplexer and a photodetector;
  • the optical demultiplexer is configured to: receive signals from an optical fiber, and demultiplex optical signals of different wavelengths, and output the signals to the photodetectors;
  • the photodetector is configured to receive an optical signal and convert it into an electrical signal for output to the multiple selection unit.
  • the receiving side optical signal processing unit 111 may further include an optical demultiplexer, a photodetector, and a transimpedance amplifier;
  • the optical demultiplexer is configured to: receive signals from an optical fiber, and demultiplex different wavelengths Optical signal, output to the photodetector;
  • the photodetector is configured to: receive an optical signal, and convert the current signal to a transimpedance amplifier;
  • the transimpedance amplifier is configured to receive a current signal, convert the current signal into a voltage signal, and output the signal to the multiple selection unit.
  • the transmitting-side electrical signal processing unit 121 includes one or more equal-connected equalizers and a second clock recovery device;
  • the equalizer is configured to: perform equalization processing on the electrical signal to be sent by the transmitting side, and output the signal to the second clock recovery device;
  • the second clock recovery device is configured to: receive an electrical signal output by the equalizer, perform timing and regeneration processing, and output the signal to the transmitting side optical signal processing unit.
  • the transmitting side optical signal processing unit 122 includes one or multiple channels of one drive two circuits, one or more sets of lasers and an optical multiplexer connected in sequence;
  • the one-drive two circuit is configured to: drive a group of lasers according to the received one-way electrical signal; any group of lasers includes two lasers;
  • the laser group is configured to generate a group of optical signals having different wavelengths carrying the same data, wherein one optical signal serves as a working channel and the other optical signal serves as a protection channel;
  • the optical multiplexer is configured to multiplex optical signals generated by each group of lasers.
  • the 100G CFP module of the embodiment of the present invention includes a photo demultiplexer (DEMUX), a photoreceiver (APD or PIN), a second-choice circuit (2:1 circuit), and a transimpedance amplifier.
  • DEMUX photo demultiplexer
  • APD or PIN photoreceiver
  • second-choice circuit 2:1 circuit
  • transimpedance amplifier TIA
  • LIA Limiting Amplifier
  • CDR Clock Recovery Device
  • Transmitter side includes equalizer, CDR, laser driver (LD DRIVER), laser, optical multiplexer (MUX).
  • the function of the optical demultiplexer on the receiving side is to decompose ten wavelengths of light from the received optical signal.
  • the signals have wavelengths of ⁇ 1, ⁇ 2... ⁇ 10, respectively.
  • the device can use DEMUX of AWG (Arrayed Waveguide Grating) technology.
  • the photoelectric receiving device on the receiving side can select a PIN or an APD according to the difference of the transmission distance, and its function is to convert the optical signal received at each wavelength into an electrical signal.
  • This portion also has a photocurrent detecting circuit. The intensity of the received optical signal is detected using a photocurrent detecting circuit.
  • the receiving side two-selection circuit (2:1 circuit) functions to select one of the two input signals according to the switching condition and output.
  • the switching conditions include:
  • the LOCK signal generated by the CDR indicates lock (signal is high), and the intensity of the optical signal of the working channel (channel represented by ⁇ j) If it is greater than or equal to the threshold, the working channel (the channel represented by ⁇ j) is selected as the output;
  • the protection When the protection is turned on (the EN signal is high), if the CDR LOCK signal generated by the CDR indicates that it is not locked, or the intensity of the optical signal of the working channel (the channel represented by ⁇ j) is less than the threshold, then select a protection channel (a channel represented by ⁇ j+1) as an output;
  • the electrical signal of the working channel (the channel represented by ⁇ j) is selected as the output;
  • the alternative circuit can include a comparator, an AND gate, or an OR gate and an output circuit
  • the comparator compares the intensity of the optical signal of the working channel (the channel represented by ⁇ j) with the threshold, and outputs a high level when the intensity of the optical signal of the working channel is greater than or equal to the threshold, and the intensity of the optical signal in the working channel When it is less than the threshold, it outputs a low level;
  • the input of the AND gate includes three signals: a protection enable signal (EN), a LOCK signal generated by the CDR (CDR LOCK), and an output signal of the comparator.
  • the AND gate performs a logical AND operation on the above three signals, and the result is output to or a gate; wherein, when the protection enable signal (EN) is high, the protection function is turned on, and when the low level is low, the protection function is not turned on; when the CDR LOCK signal is high, the signal is locked, and when the low level is low, the signal is not locked;
  • the input of the OR gate includes two signals: the signal of the protection enable signal (EN) inverted by the inverter, and the output signal of the AND gate, or the gate logically ORing the two signals, and the result is used as an output circuit.
  • a control signal the control signal can also be output to a processor, according to the processor The control signal knows whether it is currently working in the working channel or the protection channel;
  • the output circuit selects the electrical signal of the working channel (the channel represented by ⁇ j) as the output; when the output of the OR gate is low, the output circuit selects the protection channel (the channel represented by ⁇ j+1) Electrical signal as an output;
  • the two-choice circuit can also be implemented in other forms such as FPGA.
  • the role of the receiving side transimpedance amplifier (TIA) is to convert the photocurrent into a voltage signal that is sent to a limiting amplifier (LIA) for equal amplitude amplification and shaping, which facilitates data and clock recovery.
  • LIA limiting amplifier
  • the role of the receiving side CDR is to time and regenerate the electrical signal, which reduces signal jitter and improves signal quality.
  • the transmit side equalizer (EQ) circuit is used to equalize the signal to ensure that the signal waveform is not distorted.
  • the role of the CDR on the transmitting side is to time and regenerate the electrical signal, which reduces signal jitter and improves signal quality.
  • the LD DRIVER function on the transmitting side is to generate a modulated signal of the laser to provide a modulated signal to the laser.
  • one driver drives two lasers. The wavelengths of the optical signals produced by the two lasers controlled by the same driver are different.
  • the driving circuit here includes two triodes (transistor 1, triode 2), a constant current source, a coupling capacitor, and a matching network.
  • the signal from the CDR drives the transistor, and the output of the transistor drives the lasers ⁇ j, ⁇ j+1 through the coupling capacitor.
  • This part of the circuit can also be implemented in other forms such as a power divider.
  • the transmitting side LD is a laser that converts an electrical signal into an optical signal of a specific wavelength. These wavelengths include: ⁇ 1, ⁇ 2... ⁇ 10.
  • the function of the transmitting side optical multiplexer is to multiplex the optical signals of ten wavelengths into one optical fiber to generate a mixed optical signal.
  • the 100G CFP module uses one driver to drive two lasers on the transmitting side and two alternative circuits on the receiving side, thereby implementing the 1+1 protection function of the optical path in the CFP module, which is beneficial to the CFP module in the metropolitan area network or the trunk line.
  • a large number of applications in the ring network reduce the size of the board, improve the integration, reduce the switching response time, facilitate the wavelength protection, and increase the added value of the CFP module.
  • the 100G CFP module has high-speed photoelectric conversion function, high integration and stable performance.
  • the light receiving unit has the characteristics of low power consumption and high sensitivity, which is beneficial to long-distance transmission of signals; TIA can accurately convert electrical signals into voltage signals. LIA can ensure that the signal amplitude is within a reasonable range to ensure the normal operation of the latter circuit; the optical transmitting component can realize long-distance transmission, wherein the EQ circuit guarantees the amplitude and waveform of the digital signal, and the clock data recovery CDR circuit has a good high frequency.
  • the jitter characteristic is beneficial to the data recovery of the synchronous data during transmission in the network communication, so that the overall performance of the module is improved, and the current optical network long-distance data transmission needs are met.
  • the optical transceiver module provided by the above embodiment provides a light path in the CFP module by using a driver to drive two lasers on the transmitting side of the optical transceiver module and selecting a working channel and a protection channel on the receiving side using a two-selection circuit.
  • the 1+1 protection function reduces the size of the board, improves the integration, and shortens the switching response time.
  • a flowchart of a receiving side in an implementation method of an optical transceiver module according to an embodiment of the present invention includes the following steps:
  • Step 501 Receive an optical signal of the working channel and the protection channel, and convert the signal into an electrical signal.
  • the signal is received from the optical fiber, and the optical signals of different wavelengths are demultiplexed and converted into electrical signals.
  • Step 502 selecting an electrical signal of the working channel or the protection channel
  • determining whether the protection switching condition is satisfied, and selecting an electrical signal of the working channel or the protection channel according to the determination result includes:
  • the electrical signal of the working channel is selected
  • the electrical signal of the protection channel is selected
  • step 503 the selected electrical signal is processed and output.
  • step 503 the current signal is converted into a voltage signal for the selected electrical signal, subjected to equal-amplification, shaping, and timing and regeneration processing and output.
  • FIG. 6 is a flowchart of a transmitting side in an implementation method of an optical transceiver module according to an embodiment of the present disclosure, which includes the following steps:
  • Step 601 processing an electrical signal to be sent
  • the equalization processing, timing and regeneration processing are sequentially performed on the electrical signals to be transmitted;
  • Step 602 generating a working channel optical signal and a protection channel optical signal and outputting.
  • step 602 a plurality of sets of optical signals are generated, wherein each set of optical signals includes two optical signals having different wavelengths carrying the same data, wherein one optical signal serves as a working channel and the other optical signal serves as a protection channel; Output after multiplexing.
  • the working channel and the protection channel are selected on the receiving side, and the working channel signal and the protection channel signal are simultaneously generated on the transmitting side, thereby implementing 1+1 protection of the optical path in the CFP module.
  • the function reduces the size of the board, improves the integration and shortens the switching response time.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • the device/function module/function unit in the above embodiment is implemented in the form of a software function module and When sold or used as a stand-alone product, it can be stored on a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • a plurality of lasers are driven by using one driver on the transmitting side of the optical transceiver module, and a working channel and a protection channel are selected by using a multi-selection circuit on the receiving side, thereby implementing the optical path protection function in the optical transceiver module, thereby reducing
  • the board size increases integration and reduces switching response time.

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Abstract

本文公布一种光收发模块及实现方法，针对所述光收发模块的接收侧，接收工作通道和保护通道的光信号，转换为电信号，选择工作通道或保护通道的电信号，进行处理并输出；以及，针对所述光收发模块的发送侧，对要发送的电信号进行处理，产生工作通道光信号和保护通道光信号并输出。

Description

一种光收发模块及实现方法 技术领域
本申请涉及但不限于光通信技术领域。
背景技术
随着波分复用技术在长途干线上的大规模应用，以及用户接入网的宽带化技术的日益普及，城域网作为桥接终端用户和长途干线网的网络，发展相对滞后，逐渐成为光网络容量和发展的瓶颈。当前，以IP为代表的数据业务的迅速发展、以及3G/4G部署的呼声日益高涨，都给城域网提出了容量和功能方面的要求。目前广泛使用的10G光网络已不能满足高速增长的互联网用户数量和应用对带宽的需要，市场迫切地需要高速光通信***。100G光收发模块赢得越来越多的市场应用。
相关技术的100G光收发模块，比如，CFP(Centum Form-factor Pluggable，100G可插拔封装)光模块通常包括以下组成部分：激光器、探测器、驱动电路、控制电路、速率转换器(Gearbox)和光复用器/解复用器等。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
在相关技术中，OTN(OpticalTransportNetwork，光传送网)或者PTN(Packet Transport Network，分组传送网，)等网络使用CFP模块时，保护功能(比如，1+1保护等)是在集成有CFP模块的板卡上实现的，保护响应速度慢、保护倒换的切换时间比较长，增加了板卡的复杂度。
本文提供一种光收发模块及实现方法，能够在光收发模块内部实现保护功能，减小了单板尺寸，提高了集成度，缩短了倒换响应时间。
一种光收发模块，包括：
接收侧光信号处理单元，设置为：接收工作通道和保护通道的光信号，转换为电信号并输出给多路选择单元；
多路选择单元，设置为：接收工作通道和保护通道的电信号，选择工作通道或保护通道的电信号作为输出；
接收侧电信号处理单元，设置为：对多路选择单元输出的电信号进行处理并输出；
发送侧电信号处理单元，设置为：对发送侧要发送的电信号进行处理并输出给发送侧光信号处理单元；
发送侧光信号处理单元，设置为：接收发送侧电信号处理单元输出的电信号，根据电信号产生工作通道光信号和保护通道光信号并输出。
可选地，该光收发模块还包括下述特点：
所述多路选择单元包括一路或多路二选一电路；
所述二选一电路包括输入单元、控制单元和输出单元；
输入单元，设置为：接收工作通道和保护通道的电信号；
控制单元，设置为：判断保护倒换条件是否满足，并根据判断结果输出控制信号给输出单元；
输出单元，设置为：根据所述控制信号选择工作通道或保护通道的电信号作为输出。
可选地，该光收发模块还包括下述特点：
控制单元，是设置为：
在开启保护的情况下，如多路选择单元的输出信号锁定成功且工作通道的光信号的强度大于或等于阈值，则输出控制信号给输出单元，所述控制信号指示输出单元选择工作通道的电信号作为输出；
在开启保护的情况下，如多路选择单元的输出信号未锁定或者工作通道的光信号的强度小于阈值，则输出控制信号给输出单元，所述控制信号指示输出单元选择保护通道的电信号作为输出。
可选地，该光收发模块还包括下述特点：
控制单元，是设置为：
在未开启保护的情况下，输出控制信号给输出单元，所述控制信号指示输出单元选择工作通道的电信号作为输出。
可选地，该光收发模块还包括下述特点：
所述接收侧电信号处理单元，包括一路或多路依次连接的跨阻放大器、限幅放大器、和时钟数据恢复器件；
所述跨阻放大器，设置为：接收所述多路选择单元输出的电流信号，将所述电流信号转换为电压信号，输出给限幅放大器；
限幅放大器，设置为：接收所述跨阻放大器输出的电压信号，进行等幅放大和整形，输出给第一时钟恢复器件；
所述第一时钟恢复器件，设置为：接收限幅放大器输出的电信号，进行定时和再生处理，输出给下游设备。
可选地，该光收发模块还包括下述特点：
所述第一时钟恢复器件，还设置为：在对接收到的信号锁定失败时输出锁定告警信号。
可选地，该光收发模块还包括下述特点：
所述接收侧光信号处理单元包括光解复用器和光电探测器；
所述光解复用器，设置为：从光纤上接收信号，并解复用出不同波长的光信号，输出给光电探测器；
所述光电探测器，设置为：接收光信号，转换为电信号输出给多路选择单元。
可选地，该光收发模块还包括下述特点：
所述接收侧光信号处理单元包括光解复用器、光电探测器和跨阻放大器；
所述光解复用器，设置为：从光纤上接收信号，并解复用出不同波长的光信号，输出给光电探测器；
所述光电探测器，设置为：接收光信号，转换为电流信号输出给跨阻放 大器；
所述跨阻放大器，设置为：接收电流信号，将所述电流信号转换为电压信号，输出给多路选择单元。
可选地，该光收发模块还包括下述特点：
所述发送侧电信号处理单元包括一路或多路依次连接的均衡器和第二时钟恢复器件；
所述均衡器，设置为：对发送侧要发送的电信号进行均衡处理，输出给时钟恢复器件；
所述第二时钟恢复器件，设置为：接收均衡器输出的电信号，进行定时和再生处理，输出给发送侧光信号处理单元。
可选地，该光收发模块还包括下述特点：
所述发送侧光信号处理单元包括依次连接的一路或多路一驱二电路、一组或多组激光器和光复用器；
所述一驱二电路，设置为：根据接收到的一路电信号驱动一组激光器；任一组激光器包括两个激光器；
所述激光器组，设置为：产生承载相同数据的一组波长不同的光信号，其中一路光信号作为工作通道，另一路光信号作为保护通道；
所述光复用器，设置为：对每组激光器产生的光信号进行复用。
可选地，该光收发模块还包括下述特点：
所述光收发模块为CFP模块。
一种光收发模块的实现方法，包括：
针对所述光收发模块的接收侧，接收工作通道和保护通道的光信号，转换为电信号，选择工作通道或保护通道的电信号，进行处理并输出；以及，
针对所述光收发模块的发送侧，对要发送的电信号进行处理，产生工作通道光信号和保护通道光信号并输出。
可选地，所述选择工作通道或保护通道的电信号包括：
判断保护倒换条件是否满足，根据判断结果选择工作通道或保护通道的 电信号。
可选地，所述判断保护倒换条件是否满足，根据判断结果选择工作通道或保护通道的电信号包括：
在开启保护的情况下，如输出信号锁定成功且工作通道的光信号的强度大于或等于阈值，则选择工作通道的电信号；
在开启保护的情况下，如输出信号未锁定或者工作通道的光信号的强度小于阈值，则选择保护通道的电信号；
在未开启保护的情况下，选择工作通道的电信号。
一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行上述任一项的方法。
与相关技术相比，本发明实施例提供的一种光收发模块，通过在光收发模块的发送侧使用一个驱动器驱动多个激光器，在接收侧使用多选一电路选择工作通道和保护通道，从而在光收发模块中实现了光路的保护功能，减小了单板尺寸，提高了集成度，缩短了倒换响应时间。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
图1为本发明实施例的一种光收发模块的结构示意图。
图2为本发明实施例的一种光收发模块(100G CFP模块)的结构示意图。
图3为图2所示的100G CFP模块中二选一电路的示意图。
图4为图2所示的100G CFP模块中一驱二电路的示意图；
图5为本发明实施例的光收发模块的实现方法中接收侧的流程图；
图6为本发明实施例的光收发模块的实现方法中发送侧的流程图。
本发明的实施方式
下文中将结合附图对本发明的实施方式进行详细说明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
如图1所示，本发明实施例提供了一种光收发模块，包括：
接收侧光信号处理单元111，设置为：接收工作通道和保护通道的光信号，转换为电信号并输出给多路选择单元112；
多路选择单元112，设置为：接收工作通道和保护通道的电信号，选择工作通道或保护通道的电信号作为输出；
接收侧电信号处理单元113，设置为：对多路选择单元112输出的电信号进行处理并输出；
发送侧电信号处理单元121，设置为：对发送侧要发送的电信号进行处理并输出给发送侧光信号处理单元122；
发送侧光信号处理单元122，设置为：接收发送侧电信号处理单元121输出的电信号，根据电信号产生工作通道光信号和保护通道光信号并输出。
所述光收发模块还可以包括下述特点：
其中，所述光收发模块为CFP模块。
其中，所述多路选择单元121包括一路或多路多选一电路；
所述多选一电路可以是二选一电路；
所述二选一电路包括输入单元、控制单元和输出单元；
输入单元，设置为：接收工作通道和保护通道的电信号；
控制单元，设置为：判断保护倒换条件是否满足，并根据判断结果输出控制信号给输出单元；
输出单元，设置为：根据所述控制信号选择工作通道或保护通道的电信号作为输出。
其中，控制单元，是设置为：
在开启保护的情况下，如多路选择单元的输出信号锁定成功且工作通道的光信号的强度大于或等于阈值，则输出控制信号给输出单元，所述控制信号指示输出单元选择工作通道的电信号作为输出；
在开启保护的情况下，如多路选择单元的输出信号未锁定或者工作通道的光信号的强度小于阈值，则输出控制信号给输出单元，所述控制信号指示输出单元选择保护通道的电信号作为输出；以及
在未开启保护的情况下，输出控制信号给输出单元，所述控制信号指示输出单元选择工作通道的电信号作为输出。
其中，所述接收侧电信号处理单元113，包括一路或多路依次连接的跨阻放大器(Transimpedance Amplifier，TIA)、限幅放大器(Limiting Amplifier，LIA)、和时钟数据恢复(Clock Data Recovery，CDR)器件；
所述跨阻放大器，设置为：接收所述多路选择单元112输出的电流信号，将所述电流信号转换为电压信号，输出给限幅放大器；
限幅放大器，设置为：接收所述跨阻放大器输出的电压信号，进行等幅放大和整形，输出给第一时钟恢复器件；
所述第一时钟恢复器件，设置为：接收限幅放大器输出的电信号，进行定时和再生处理，输出给下游设备。
其中，所述第一时钟恢复器件，还设置为：在对接收到的信号锁定失败时输出锁定告警信号。
其中，所述接收侧光信号处理单元111可以包括光解复用器和光电探测器；
所述光解复用器，设置为：从光纤上接收信号，并解复用出不同波长的光信号，输出给光电探测器；
所述光电探测器，设置为：接收光信号，转换为电信号输出给多路选择单元。
其中，所述接收侧光信号处理单元111还可以包括光解复用器、光电探测器和跨阻放大器；
所述光解复用器，设置为：从光纤上接收信号，并解复用出不同波长的 光信号，输出给光电探测器；
所述光电探测器，设置为：接收光信号，转换为电流信号输出给跨阻放大器；
所述跨阻放大器，设置为：接收电流信号，将所述电流信号转换为电压信号，输出给多路选择单元。
其中，所述发送侧电信号处理单元121包括一路或多路依次连接的均衡器和第二时钟恢复器件；
所述均衡器，设置为：对发送侧要发送的电信号进行均衡处理，输出给第二时钟恢复器件；
所述第二时钟恢复器件，设置为：接收均衡器输出的电信号，进行定时和再生处理，输出给发送侧光信号处理单元。
其中，所述发送侧光信号处理单元122包括依次连接的一路或多路一驱二电路、一组或多组激光器和光复用器；
所述一驱二电路，设置为：根据接收到的一路电信号驱动一组激光器；任一组激光器包括两个激光器；
所述激光器组，设置为：产生承载相同数据的一组波长不同的光信号，其中一路光信号作为工作通道，另一路光信号作为保护通道；
所述光复用器，设置为：对每组激光器产生的光信号进行复用。
应用示例
如图2所示，本发明实施例的100G CFP模块，接收侧包括光解复用器(DEMUX)、光电接收器件(APD或者PIN)、二选一电路(2:1电路)、跨阻放大器(TIA)、限幅放大器(LIA)、时钟恢复器件(CDR)；发送侧包括均衡器、CDR、激光器驱动器(LD DRIVER)、激光器、光复用器(MUX)。
接收侧的光解复用器的作用是从接收到的光信号中分解出十个波长的光 信号，波长分别是λ1，λ2…λ10。该器件可以使用AWG(Arrayed Waveguide Grating，阵列波导光栅)技术的DEMUX。
接收侧的光电接收器件，根据传输距离的不同可以选用PIN或者APD，它的作用是把接收到每个波长的光信号转换为电信号。该部分同时具有光电流检测电路。使用光电流检测电路检测收到光信号的强度。
如图3所示，接收侧二选一电路(2:1电路)的作用是根据倒换条件选择两个输入信号中的一个，进行输出。倒换条件包括：
在开启保护的情况下(EN信号为高电平)，如CDR产生的锁定LOCK信号(CDR LOCK)表示锁定(信号为高电平)，且工作通道(λj代表的通道)的光信号的强度大于或等于阈值，则选择工作通道(λj代表的通道)作为输出；
在开启保护的情况下(EN信号为高电平)，如CDR产生的锁定LOCK信号(CDR LOCK)表示未锁定，或者，工作通道(λj代表的通道)的光信号的强度小于阈值，则选择保护通道(λj+1代表的通道)作为输出；
在未开启保护的情况下(EN信号为低电平)，选择工作通道(λj代表的通道)的电信号作为输出；
二选一电路可以包括比较器、与门、或门和输出电路；
其中，比较器将工作通道(λj代表的通道)的光信号的强度与阈值进行比较，在工作通道的光信号的强度大于或等于阈值时，输出高电平，在工作通道的光信号的强度小于阈值时，输出低电平；
与门的输入包括三个信号：保护使能信号(EN)、CDR产生的锁定LOCK信号(CDR LOCK)和比较器的输出信号，与门对上述三个信号进行逻辑与操作，结果输出给或门；其中，保护使能信号(EN)高电平时表示开启保护功能，低电平时表示未开启保护功能；CDR LOCK信号高电平时表示信号锁定，低电平时表示信号未锁定；
或门的输入包括两个信号：保护使能信号(EN)经过反相器反相后的信号，以及与门的输出信号，或门对上述两个信号进行逻辑或操作，结果作为输出电路的控制信号；所述控制信号还可以输出给处理器，由处理器根据该 控制信号获知当前是工作在工作通道还是保护通道；
当或门的输出为高电平时，输出电路选择工作通道(λj代表的通道)的电信号作为输出；当或门的输出为低电平时，输出电路选择保护通道(λj+1代表的通道)的电信号作为输出；
二选一电路也可以用FPGA等其它形式实现。
接收侧跨阻放大器(TIA)的作用是把光电流转换为电压信号，送给限幅放大器(LIA)进行等幅度放大和整形，该过程有利于数据和时钟恢复。
接收侧CDR的作用是对电信号进行定时和再生，降低了信号抖动，提高了信号质量。
发送侧均衡器(EQ)电路，作用是对信号进行均衡处理，保证信号波形不发生畸变。
发送侧CDR的作用是对电信号进行定时和再生，降低了信号抖动，提高了信号质量。
发送侧LD DRIVER作用是产生激光器的调制信号，给激光器提供调制信号。为了实现1+1保护，此处一个驱动器驱动两个激光器。被同一个驱动器控制的两个激光器产生的光信号的波长不同。
如图4所示，此处的驱动电路包括，两个三极管(三极管1、三极管2)、恒流源、耦合电容、匹配网络。从CDR来的信号驱动三极管，三极管输出经过耦合电容去驱动激光器λj、λj+1。该部分电路也可以用功分器等其它形式实现。
发送侧LD是激光器，作用是把电信号转换为特定波长的光信号。这些波长包括：λ1，λ2…λ10。
发送侧光复用器(MUX)的作用是，把十个波长的光信号复用到一根光纤里面，产生一个混合后的光信号。
本100G CFP模块在发送侧使用一个驱动器驱动两个激光器，在接收侧使用了二选一电路，从而在CFP模块中实现了光路的1+1保护功能，有利于CFP模块在城域网或者干线环网中的大量应用，减小了单板尺寸，提高了集成度，减小了倒换响应时间，有利于波长保护，增加了CFP模块的附加值。
此外，本100G CFP模块具有高速光电转换功能，集成度高，性能稳定，光接收单元具有功耗低、灵敏度高等特点，有利于信号的远距离传输；TIA能够准确把电信号转换为电压信号，LIA能够保证信号幅度在合理范围内，保证后级电路正常工作；光发射组件能够实现远距离传输，其中EQ电路保证了数字信号的幅度和波形，时钟数据恢复CDR电路具有很好的高频去抖特性，有利于在网络通信中同步数据在传输过程中的数据恢复，使模块的整体性能得到了提高，满足当前光网络长距离数据传输的需要。
上述实施例提供的一种光收发模块，通过在光收发模块的发送侧使用一个驱动器驱动两个激光器，在接收侧使用二选一电路选择工作通道和保护通道，从而在CFP模块中实现了光路的1+1保护功能，减小了单板尺寸，提高了集成度，缩短了倒换响应时间。
如图5所示，为本发明实施例的本发明实施例的光收发模块的实现方法中接收侧的流程图，包括如下步骤：
步骤501，接收工作通道和保护通道的光信号，转换为电信号；
其中，在本步骤中，从光纤上接收信号，并解复用出不同波长的光信号，转换为电信号。
步骤502，选择工作通道或保护通道的电信号；
其中，在本步骤中，判断保护倒换条件是否满足，根据判断结果选择工作通道或保护通道的电信号。
其中，所述判断保护倒换条件是否满足，根据判断结果选择工作通道或保护通道的电信号包括：
在开启保护的情况下，如输出信号锁定成功且工作通道的光信号的强度大于或等于阈值，则选择工作通道的电信号；
在开启保护的情况下，如输出信号未锁定或者工作通道的光信号的强度小于阈值，则选择保护通道的电信号；
在未开启保护的情况下，选择工作通道的电信号。
步骤503，对选择的电信号进行处理并输出。
在步骤503中，针对选择的电信号，将电流信号转换为电压信号，进行等幅放大、整形，以及进行定时和再生处理并输出。
如图6所示，为本发明实施例的本发明实施例的光收发模块的实现方法中发送侧的流程图，包括如下步骤：
步骤601，对要发送的电信号进行处理；
其中，本步骤中，对要发送的电信号依次进行均衡处理、定时和再生处理；
步骤602，产生工作通道光信号和保护通道光信号并输出。
在步骤602中，产生多组光信号，其中每组光信号包括两路承载相同数据的波长不同的光信号，其中一路光信号作为工作通道，另一路光信号作为保护通道；对每组光信号进行复用后输出。
上述实施例提供的一种光收发模块的实现方法，在接收侧选择工作通道和保护通道，在发送侧同时产生工作通道信号和保护通道信号，从而在CFP模块中实现了光路的1+1保护功能，减小了单板尺寸，提高了集成度，缩短了倒换响应时间。
本领域普通技术人员可以理解上述实施例的全部或部分步骤可以使用计算机程序流程来实现，所述计算机程序可以存储于一计算机可读存储介质中，所述计算机程序在相应的硬件平台上(如***、设备、装置、器件等)执行，在执行时，包括方法实施例的步骤之一或其组合。
可选地，上述实施例的全部或部分步骤也可以使用集成电路来实现，这些步骤可以被分别制作成一个个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。
上述实施例中的装置/功能模块/功能单元可以采用通用的计算装置来实现，它们可以集中在单个的计算装置上，也可以分布在多个计算装置所组成的网络上。
上述实施例中的装置/功能模块/功能单元以软件功能模块的形式实现并 作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。上述提到的计算机可读取存储介质可以是只读存储器，磁盘或光盘等。
工业实用性
本发明实施例通过在光收发模块的发送侧使用一个驱动器驱动多个激光器，在接收侧使用多选一电路选择工作通道和保护通道，从而在光收发模块中实现了光路的保护功能，减小了单板尺寸，提高了集成度，缩短了倒换响应时间。

Claims (15)

  1. 一种光收发模块，包括：
    接收侧光信号处理单元，设置为：接收工作通道和保护通道的光信号，转换为电信号并输出给多路选择单元；
    多路选择单元，设置为：接收工作通道和保护通道的电信号，选择工作通道或保护通道的电信号作为输出；
    接收侧电信号处理单元，设置为：对多路选择单元输出的电信号进行处理并输出；
    发送侧电信号处理单元，设置为：对发送侧要发送的电信号进行处理并输出给发送侧光信号处理单元；
    发送侧光信号处理单元，设置为：接收发送侧电信号处理单元输出的电信号，根据电信号产生工作通道光信号和保护通道光信号并输出。
  2. 如权利要求1所述的光收发模块，其中：
    所述多路选择单元包括一路或多路二选一电路；
    所述二选一电路包括输入单元、控制单元和输出单元；
    输入单元，设置为：接收工作通道和保护通道的电信号；
    控制单元，设置为：判断保护倒换条件是否满足，并根据判断结果输出控制信号给输出单元；
    输出单元，设置为：根据所述控制信号选择工作通道或保护通道的电信号作为输出。
  3. 如权利要求2所述的光收发模块，其中：
    控制单元，是设置为：
    在开启保护的情况下，如多路选择单元的输出信号锁定成功且工作通道的光信号的强度大于或等于阈值，则输出控制信号给输出单元，所述控制信号指示输出单元选择工作通道的电信号作为输出；
    在开启保护的情况下，如多路选择单元的输出信号未锁定或者工作通道 的光信号的强度小于阈值，则输出控制信号给输出单元，所述控制信号指示输出单元选择保护通道的电信号作为输出。
  4. 如权利要求3所述的光收发模块，其中：
    控制单元，是设置为：
    在未开启保护的情况下，输出控制信号给输出单元，所述控制信号指示输出单元选择工作通道的电信号作为输出。
  5. 如权利要求1所述的光收发模块，其中：
    所述接收侧电信号处理单元，包括一路或多路依次连接的跨阻放大器、限幅放大器、和第一时钟数据恢复器件；
    所述跨阻放大器，设置为：接收所述多路选择单元输出的电流信号，将所述电流信号转换为电压信号，输出给限幅放大器；
    限幅放大器，设置为：接收所述跨阻放大器输出的电压信号，进行等幅放大和整形，输出给第一时钟恢复器件；
    所述第一时钟恢复器件，设置为：接收限幅放大器输出的电信号，进行定时和再生处理，输出给下游设备。
  6. 如权利要求5所述的光收发模块，其中：
    所述第一时钟恢复器件，还设置为：在对接收到的信号锁定失败时输出锁定告警信号。
  7. 如权利要求1所述的光收发模块，其中：
    所述接收侧光信号处理单元包括光解复用器和光电探测器；
    所述光解复用器，设置为：从光纤上接收信号，并解复用出不同波长的光信号，输出给光电探测器；
    所述光电探测器，设置为：接收光信号，转换为电信号输出给多路选择单元。
  8. 如权利要求1所述的光收发模块，其中：
    所述接收侧光信号处理单元包括光解复用器、光电探测器和跨阻放大器；
    所述光解复用器，设置为：从光纤上接收信号，并解复用出不同波长的光信号，输出给光电探测器；
    所述光电探测器，设置为：接收光信号，转换为电流信号输出给跨阻放大器；
    所述跨阻放大器，设置为：接收电流信号，将所述电流信号转换为电压信号，输出给多路选择单元。
  9. 如权利要求1所述的光收发模块，其中：
    所述发送侧电信号处理单元包括一路或多路依次连接的均衡器和第二时钟恢复器件；
    所述均衡器，设置为：对发送侧要发送的电信号进行均衡处理，输出给第二时钟恢复器件；
    所述第二时钟恢复器件，设置为：接收均衡器输出的电信号，进行定时和再生处理，输出给发送侧光信号处理单元。
  10. 如权利要求1所述的光收发模块，其中：
    所述发送侧光信号处理单元包括依次连接的一路或多路一驱二电路、一组或多组激光器和光复用器；
    所述一驱二电路，设置为：根据接收到的一路电信号驱动一组激光器；任一组激光器包括两个激光器；
    所述激光器组，设置为：产生承载相同数据的一组波长不同的光信号，其中一路光信号作为工作通道，另一路光信号作为保护通道；
    所述光复用器，设置为：对每组激光器产生的光信号进行复用。
  11. 如权利要求1-10中任一项所述的光收发模块，其中：
    所述光收发模块为100G可插拔封装CFP模块。
  12. 一种光收发模块的实现方法，包括：
    针对所述光收发模块的接收侧，接收工作通道和保护通道的光信号，转换为电信号，选择工作通道或保护通道的电信号，进行处理并输出；以及，
    针对所述光收发模块的发送侧，对要发送的电信号进行处理，产生工作通道光信号和保护通道光信号并输出。
  13. 如权利要求12所述的实现方法，其中：
    所述选择工作通道或保护通道的电信号包括：
    判断保护倒换条件是否满足，根据判断结果选择工作通道或保护通道的电信号。
  14. 如权利要求13所述的实现方法，其中：
    所述判断保护倒换条件是否满足，根据判断结果选择工作通道或保护通道的电信号包括：
    在开启保护的情况下，如输出信号锁定成功且工作通道的光信号的强度大于或等于阈值，则选择工作通道的电信号；
    在开启保护的情况下，如输出信号未锁定或者工作通道的光信号的强度小于阈值，则选择保护通道的电信号；
    在未开启保护的情况下，选择工作通道的电信号。
  15. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行权利要求12-14任一项的方法。
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