WO2016095715A1 - Module d'émission-réception optique et son procédé de mise en œuvre - Google Patents

Module d'émission-réception optique et son procédé de mise en œuvre 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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Prior art keywords
signal
output
optical
protection
channel
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PCT/CN2015/096550
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English (en)
Chinese (zh)
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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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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un module d'émission-réception optique et son procédé de mise en œuvre. Le procédé consiste : par rapport à un côté réception du module d'émission-réception optique, à recevoir des signaux optiques d'un canal de travail et d'un canal de protection, à convertir ces derniers en signaux électriques, et à sélectionner des signaux électriques du canal de travail ou du canal de protection, pour traiter et délivrer ces derniers ; et par rapport à un côté envoi du module d'émission-réception optique, à traiter les signaux électriques à envoyer, pour générer des signaux optiques du canal de travail et des signaux optiques du canal de protection et à délivrer ces derniers.
PCT/CN2015/096550 2014-12-18 2015-12-07 Module d'émission-réception optique et son procédé de mise en œuvre WO2016095715A1 (fr)

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CN201410797580.1 2014-12-18
CN201410797580.1A CN105763245A (zh) 2014-12-18 2014-12-18 一种光收发模块

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CN114216489A (zh) * 2021-12-22 2022-03-22 欧梯恩智能科技(苏州)有限公司 一种模块化的光传感解调系统及调解方法
CN114216489B (zh) * 2021-12-22 2024-03-08 欧梯恩智能科技(苏州)有限公司 一种模块化的光传感解调系统及调解方法

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