WO2017107218A1 - Module d'émetteur-récepteur optique 2x100g - Google Patents

Module d'émetteur-récepteur optique 2x100g Download PDF

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Publication number
WO2017107218A1
WO2017107218A1 PCT/CN2015/099087 CN2015099087W WO2017107218A1 WO 2017107218 A1 WO2017107218 A1 WO 2017107218A1 CN 2015099087 W CN2015099087 W CN 2015099087W WO 2017107218 A1 WO2017107218 A1 WO 2017107218A1
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optical
signal
channel
unit
converts
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PCT/CN2015/099087
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English (en)
Chinese (zh)
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张玉安
徐红春
梁飞
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武汉光迅科技股份有限公司
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Publication of WO2017107218A1 publication Critical patent/WO2017107218A1/fr

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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
    • H04B10/40—Transceivers

Definitions

  • the present invention relates to the field of optical communications, and in particular, to an optical module conforming to the IEEE802.3ba high-speed Ethernet standard, and more particularly to a 2 ⁇ 100G Ethernet optical transceiver module.
  • the 100G optical transceiver module that satisfies the IEEE802.3ba high-speed Ethernet standard adopts the CFP series and QSFP28 package structure.
  • the implementation adopts the 4 wave 25G rate optical transceiver component, which is carried out in two fibers by splitting and combining. transmission.
  • the switch with the QSFP28 package in the standard 1U chassis has a maximum switching capacity of no more than 5Tb/s, and the switching capability of the switch in the CFP series package is about It is 4Tb/s.
  • a larger number of switches need to be deployed, and these switches will occupy a large volume and consume a large amount of energy, thereby causing a problem of high construction and maintenance costs.
  • optical transceiver module has practical application value.
  • the invention proposes an implementation scheme of a 2 ⁇ 100G optical transceiver module to solve the above problems.
  • the optical signal transmitting and receiving part adopts 8 wave 25Gb/s, 4 wave 50Gb/s or 2 wave 100Gb/s through the existing standard CFP series or QSFP28 package size.
  • the multiplexed mode realizes the transmission rate of 200 Gb/s in the optical fiber, and the transmission and reception part of the electrical interface adopts each
  • the channel is transmitted in 25Gb/s or 50Gb/s mode, and is compatible with OIF CEI-28G-VSR, CAUI-4, OTL4.4 and OIF CEI-56G-VSR electrical interface standards for data transmission.
  • the optical transceiver unit Under the premise of being compatible with the IEEE802.3ba standard, the optical transceiver unit partially realizes dual-fiber 200Gb/s transmission and reception through channel expansion and single-wave rate improvement, thereby effectively improving the data transmission capability per unit volume.
  • the invention provides a 2 ⁇ 100G Ethernet optical transceiver module, comprising: a light emitting function unit, a light receiving function unit and a control function unit, wherein:
  • the light emitting function unit receives multiple electrical signals of a rate of 25 Gb/s and/or 50 Gb/s and converts the optical signals of one channel of 200 Gb/s to the optical fiber line;
  • the light receiving function unit receives an optical signal of 200 Gb/s on the optical fiber line and converts it into multiple electrical signals of 25 Gb/s and/or 50 Gb/s for output;
  • the control function unit is simultaneously connected to the light emitting function unit and the light receiving function unit to control and detect an operating state of the light emitting function unit and the light receiving function unit.
  • control function unit includes an input and output logic control circuit, a power-on timing control circuit, a temperature control circuit, a digital-analog and analog-to-digital conversion circuit, and a storage circuit, wherein the storage circuit is configured to store firmware information and module information. ,User Info.
  • the optical transmitting function unit receives four channels of 50 Gb/s electrical signals and converts them into one 200 Gb/s optical signal for transmission, which includes four channels of input data clock recovery units.
  • the modulation pattern of the corresponding electrical signal is related to the format, and the optical transmitting component of the corresponding channel receives the driving current signal and converts it into an optical signal and transmits it to the optical fiber line for transmission; the optical receiving functional unit receives a 200Gb on the optical fiber line.
  • optical signal is converted into 4 channels of 50Gb/s electrical signals for output, including 1:4 optical splitter, 4 channels of light reception Unit, 4 channel linear or limiting amplifier unit, 4 channel output data clock recovery unit; wherein 1:4 optical splitter splits 1 channel 200Gb/s optical signal, after splitting Each channel wavelength carries 50Gb/s optical signal into the light receiving component of the corresponding channel, and the light receiving component converts the optical signal into a corresponding photocurrent according to the size of the optical signal, and the photocurrent is amplified by linear or limiting
  • the unit unit amplifies and converts the photocurrent signal into a voltage signal, and the converted voltage signal enters the output data clock recovery unit to perform data clock conditioning, and the conditioned electrical signal is transmitted through the high-speed electrical signal interface.
  • the electrical signal of the 50 Gb/s rate adopts an NRZ or PAM4 modulation pattern format.
  • the 200 Gb/s rate optical signal includes four independent different wavelengths, and the four different wavelengths follow the wavelength division multiplexing wavelength interval specified by IEEE802.3ba, or the above four
  • the center wavelengths of the same wavelength are 1295.56 nm, 1300.05 nm, 1304.58 nm, and 1309.14 nm, respectively, or the above four different wavelengths use other WDM-defined center wavelengths.
  • the optical transmitting function unit receives 8 channels of electrical signals at a rate of 25 Gb/s and converts them into an optical signal of 200 Gb/s rate for transmission, which includes an input data clock recovery unit of 8 channels.
  • the modulation pattern of the corresponding electrical signal is related to the format, and the optical transmitting component of the corresponding channel receives the driving current signal and converts it into an optical signal and transmits it to the optical fiber line for transmission; the optical receiving functional unit receives a 200Gb on the optical fiber line.
  • the /s optical signal is converted to an 8-channel 25Gb/s electrical signal for output, which includes a 1:8 optical splitter and eight channels of optical reception.
  • the wavelength carries a 25 Gb/s optical signal into the light receiving component of the corresponding channel, and the light receiving component converts the optical signal into a corresponding photocurrent according to the size of the optical signal, and the photocurrent is amplified and converted into a photocurrent signal by the limiting amplifier unit.
  • the voltage signal, the converted voltage signal enters the output data clock recovery unit for data clock conditioning, and the conditioned electrical signal is transmitted through the high-speed electrical signal interface.
  • the optical transmitting function unit receives 8 channels of electrical signals at a rate of 25 Gb/s and converts them into a 200 Gb/s optical signal for transmission, which includes 2 channels of PAM4 coding units, 2 a laser driving unit of the channel, a 2-channel optical transmitting component unit, a 2:1 optical combiner, the PAM4 encoding unit of each channel comprising a 4:1 multiplexer, a PAM4 encoder; wherein the 4:1
  • the multiplexer is used to multiplex the electrical signals of four 25Gb/s rate NRZ modulation patterns into one channel.
  • 100Gb/s rate NRZ modulation pattern format electrical signal multiplexed electrical signal is transmitted to PAM4 encoder, PAM4 encoder converts 100Gb/s rate NRZ modulation pattern format into 50Gbaud rate PAM4 modulation pattern format
  • the signal is transmitted to the laser driving unit of the corresponding channel, and the laser driving unit converts the electrical signal into a driving current of the light emitting component of the corresponding channel according to the modulation pattern format of the electrical signal, and the converted driving current signal size and corresponding electric power
  • the modulation pattern of the signal is related to the format, and the light emitting component of the corresponding channel receives the driving current signal and converts it into an optical signal and transmits it to the optical fiber line for transmission; the optical receiving function unit receives one channel of 200 Gb/s on the optical fiber line.
  • the optical signal is converted into an output of 8 channels of 25Gb/s electrical signals, including 1:2 optical splitter, 2 channel optical receiving component unit, 2 channel linear amplifier, 2 channel PAM4 decoding.
  • each of the PAM4 decoding units includes an analog-to-digital converter, a digital signal processing unit, and a 1:4 demultiplexer; wherein the 1:2 optical demultiplexer feeds one channel of 200 Gb/s optical signals Line splitting, after splitting, the optical signal carrying the wavelength of 50 Gbaud per channel enters the light receiving component of the corresponding channel, and the light receiving component converts the optical signal into a corresponding photocurrent according to the size of the optical signal, and the photocurrent passes the photocurrent through the linear amplifier
  • the signal is amplified and converted into a voltage signal, and the converted voltage signal enters an analog-to-digital converter in the PAM4 decoding unit to convert the analog signal into a digital signal, and the digital signal processing unit processes the digital signal to convert and decode the modulation format of the PAM4 into The modulation format
  • the optical transmitting function unit receives 8 channels of electrical signals at a rate of 25 Gb/s and converts them into a 200 Gb/s optical signal for transmission, which includes 2 channels of PAM4 coding units, 4 a laser driving unit of the channel, a 4-channel optical transmitting component unit, a 4:1 optical multiplexer, the PAM4 encoding unit of each channel comprising a 4:2 multiplexer, a PAM4 encoder; wherein the 4:2 The multiplexer is used to multiplex the electrical signals of the four 25Gb/s rate NRZ modulation code format into two 50Gb/s rate NRZ modulation code format electrical signals, and the multiplexed electrical signals are transmitted to the PAM4 encoder, PAM4.
  • the encoder converts the 50Gb/s rate NRZ modulation pattern format into an electrical signal of the 25Gbaud rate PAM4 modulation pattern format and transmits it to the laser driving unit of the corresponding channel, and the laser driving unit will according to the modulation pattern format of the electrical signal.
  • the electrical signal is converted into a driving current of the light emitting component of the corresponding channel, and the magnitude of the converted driving current signal is related to the modulation pattern format of the corresponding electrical signal, and the light emitting component of the corresponding channel receives the driving current signal and converts it into light.
  • the signal is transmitted to the optical fiber line for transmission; the optical receiving function unit receives an optical signal of 200 Gb/s on the optical fiber line and converts it into an electrical signal of 8 channels of 25 Gb/s for output, which includes 1:4 optical division.
  • the 1:4 optical splitter splits the optical signal of one channel of 200Gb/s, and after splitting, the optical signal carrying the wavelength of 25Gbaud per wavelength of the channel enters the light receiving component of the corresponding channel, and the light receiving component according to the size of the optical signal
  • the optical signal is converted into a corresponding photocurrent, the photocurrent is amplified by a linear amplifier and converted into a voltage signal, and the converted voltage signal enters an analog-to-digital converter in the
  • the electrical signal of the 25 Gb/s rate adopts an NRZ modulation pattern format.
  • the invention also provides an n ⁇ 100G Ethernet optical transceiver module, comprising: a light emitting function unit, a light receiving function unit and a control function unit, wherein:
  • the optical transmitting functional unit receives an electrical signal of a plurality of channels of 25 Gb/s and/or 50 Gb/s and converts the optical signals of one channel of n ⁇ 100 Gb/s to the optical fiber line;
  • the light receiving function unit receives an optical signal of n ⁇ 100 Gb/s on the optical fiber line and converts it into multiple electrical signals of 25 Gb/s and/or 50 Gb/s for output;
  • the control function unit is simultaneously connected to the light emitting function unit and the light receiving function unit to control and detect an operating state of the light emitting function unit and the light receiving function unit;
  • n 3 to 10.
  • the optical transceiver unit is extended by the channel and the single-wave rate is increased to realize the transmission and reception of the dual-fiber 200Gb/s, thereby improving the data transmission rate and reducing the power consumption of the module, thereby greatly reducing the cost of the optical transceiver module.
  • Economical, in addition, the technical solution meets a variety of electrical interface standards, with excellent backward compatibility and flexibility. By compatible with CFP series or QSFP28 package sizes, large-scale production and replacement can be achieved, saving production and replacement costs.
  • This invention combines novelty, economy, practicality and creativity, and is suitable for large-scale production to meet the demand for higher data transmission rates.
  • FIG. 1 is a functional block diagram of an internal structure according to Embodiment 1 of the present invention.
  • Embodiment 2 is a functional block diagram of an internal structure according to Embodiment 2 of the present invention.
  • Embodiment 3 is a functional block diagram of an internal structure according to Embodiment 3 of the present invention.
  • Embodiment 4 is a functional block diagram of an internal structure according to Embodiment 4 of the present invention.
  • FIG. 5 is a schematic diagram of an NRZ modulation pattern format according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a PAM4 modulation pattern format according to an embodiment of the present invention.
  • Figure 7 is a schematic view of an application in the present invention.
  • FIG. 1 is a functional block diagram of an internal structure according to Embodiment 1 of the present invention.
  • a 2 x 100G optical transceiver module is shown in FIG. 1, including a light emitting function unit 10, a light receiving function unit 20, and a control function unit 30.
  • the light emitting function unit 10 includes four channels of data clock recovery unit (CDR) 101, four channels of laser driver unit (Laser Driver) 102, four channels of light emitting unit (TOSA) 103, 4:1 photosynthetic Wave filter (4:1 Optical MUX) 104.
  • CDR data clock recovery unit
  • Laser Driver laser driver
  • TOSA four channels of light emitting unit
  • 4:1 photosynthetic Wave filter (4:1 Optical MUX)
  • the light receiving function unit 20 includes a 1:4 optical splitter (1:4Optical DeMUX) 201, a 4-channel light receiving component unit (ROSA) 202, and a 4-channel linear or limiting amplifier unit (LA/TIA) 203. , 4 channel data clock recovery unit (CDR) 204.
  • the control function unit 30 is connected to the input and output signals of the 2 ⁇ 100G optical transceiver module, and is configured to receive control information input by an external control unit (not shown) of the 2 ⁇ 100G optical transceiver module, and transmit and receive 2 ⁇ 100G optical signals.
  • the diagnostic information of the module is output to the external control unit, and the control function unit 30 is simultaneously connected to the light emitting function unit 10 and the light receiving function unit 20, and controls and detects the operating states of the light emitting function unit 10 and the light receiving function unit 20.
  • the control function unit 30 includes an input and output logic control circuit, a power-on timing control circuit, a temperature control circuit, a digital-analog and analog-to-digital conversion circuit, and a storage circuit, wherein the storage circuit is configured to store firmware information, module information, and user information.
  • Embodiment 1 of the optical transceiver module will be further described below with reference to FIG.
  • the function of the light emitting function unit 10 is: receiving four channels of 50 Gb/s electrical signals and converting them into one 200 Gb/s optical signal for transmission, and the interfaces of the respective electrical signals can be simultaneously/ separately adopted OIF CEI-56G- VSR standard or other similar electrical interface standard, 50Gb / s electrical signal can be used as shown in Figure 5.
  • the four-channel data clock recovery unit (CDR) 101 is responsible for the data clock conditioning of the 50Gb/s electrical signal of the corresponding channel, and
  • the conditioned electrical signal is transmitted to a laser driver unit 102 of the corresponding channel, and the laser driver unit 102 converts the electrical signal into a light emitting component (TOSA) 103 of the corresponding channel according to a modulation pattern format of the electrical signal.
  • the driving current, the converted driving current signal size is related to the modulation pattern format of the corresponding electrical signal, and the corresponding channel's light emitting component (TOSA) 103 receives the driving current signal and converts it into an optical signal for transmission.
  • the above data clock recovery unit (CDR) 101, laser driver unit (Laser Driver) 102, and light emission unit (TOSA) 103 are arranged in parallel in four channels (or two groups of two channels), wherein the data clock recovery unit (CDR)
  • the 101 and the Laser Driver 102 can be processed by one integrated 4-channel, two integrated 2-channel, or four single-channel.
  • the four-channel light-emitting component (TOSA) 103 component uses four independent, different wavelengths, labeled L0, L1, L2, and L3, respectively.
  • the wavelengths of L0, L1, L2, and L3 may follow the wavelength division multiplexing wavelength interval specified by IEEE802.3ba, and the center wavelengths thereof are 1295.56 nm, 1300.05 nm, 1304.58 nm, and 1309.14 nm, respectively, or other center wavelengths specified by WDM.
  • a 4:1 optical multiplexer (4:1 Optical MUX) 104 combines the 50 Gb/s optical signals transmitted by the four-channel optical emission assembly (TOSA) 103 into one optical signal of 200 Gb/s for transmission on the optical fiber line.
  • the function of the light receiving function unit 20 is: receiving one channel of 200 Gb/s optical signal on the optical fiber line and converting it into four channels of 50 Gb/s electrical signals for output, and the light receiving function unit 20 passes through the 1:4 optical demultiplexer.
  • (1:4Optical DeMUX) 201 splits the optical signal of one channel of 200 Gb/s, and the wavelengths of the optical signals of the four channels after the separation are L0, L1, L2, and L3, respectively, and the center wavelength and the light emitting function unit 10
  • the center wavelength of the four-channel light-emitting component (TOSA) 103 corresponds.
  • each channel carries 50Gb/s optical signal into the corresponding channel's light receiving component (ROSA) 202.
  • the light receiving component (ROSA) 202 converts the optical signal into a corresponding photocurrent according to the size of the optical signal, and the photocurrent passes.
  • the linear or limiting amplifier unit (LA/TIA) 203 amplifies and converts into a voltage signal, and the converted voltage signal enters a data clock recovery unit (CDR) 204 for data clock conditioning, and the conditioned electrical signal is transmitted through a high-speed electrical signal interface. transmission.
  • the above-mentioned optical signal modulation pattern format can adopt PAM4 or NRZ, and the back end of the PAM4 modulation pattern format needs to use a linear amplifier to amplify the photocurrent signal.
  • the NRZ modulation pattern uses a limiting amplifier to amplify the photocurrent signal.
  • the above-mentioned light receiving component unit (ROSA) 202, linear or limiting amplifier unit (LA/TIA) 203, data clock recovery unit (CDR) 204 is a parallel setting of 4 channels (or 2 groups of 2 channels).
  • the linear or limiting amplifier unit (LA/TIA) 203 and the data clock recovery unit (CDR) 204 can be processed by one integrated 4-channel, two integrated 2-channel, or four single-channel.
  • TX0, TX1, TX2, TX3, and RX0, RX1, RX2, and RX3 are high-speed electrical signal interfaces of the optical transceiver module of the present invention, and the electrical signal rate is 50 Gb/s, which follows OIF CEI-56G-VSR. Standard or other similar electrical interface standard.
  • TX0, TX1 and RX0, RX1 are a group for transmitting and receiving electrical signals of 100Gb/s.
  • TX2, TX3 and RX2, RX3 are a group for transmitting and receiving another set of 100Gb/s electrical signals.
  • the above two sets of 100 Gb/s electrical signals are compatible with the existing IEEE 802.3ba standard.
  • Embodiment 1 can effectively improve the optical transmission rate under the premise of being compatible with the existing IEEE802.3ba standard, and can effectively manage and control the working state of the optical transceiver module.
  • Embodiment 1 uses the 25Gb/s NRZ modulation pattern format for transmission and reception, and follows OIF CEI-28G-VSR, CAUI-4, OTL4.4. Electrical interface standard.
  • the illustrated light emitting function unit 10a includes an 8-channel data clock recovery unit (CDR) 101a, an 8-channel laser driver unit 102a, and eight channel light-emitting unit units (TOSA) 103a, 8: 1 optical combiner (8: 1 Optical MUX) 104a.
  • CDR data clock recovery unit
  • TOSA eight channel light-emitting unit units
  • the center wavelength of the light-emitting component unit (TOSA) 103a of the eight channels may be 1273.55 nm, 1277.89 nm, 1282.26 nm, 1286.66 nm, 1295.56 nm, 1300.05 nm, 1304.58 nm, and 1309.14 nm, or other center wavelengths specified by WDM. They are labeled as L0, L1, L2...L7.
  • the illustrated light receiving function unit 20a includes a 1:8 optical splitter (1:8Optical DeMUX) 201a, an 8-channel light receiving unit (ROSA) 202a, and an 8-channel limiting amplifier unit (TIA) 203a, 8 The data clock recovery unit (CDR) 204a of the channel.
  • the function of the light emitting function unit 10a is: receiving 8 channels of 25Gb/s rate electrical signals and converting them into one 200Gb/s rate optical signals for transmission, and the interfaces of the respective electrical signals can adopt CEI- simultaneously/respectively.
  • 28G-VSR, CAUI-4, OTL4.4 electrical interface standard 25Gb/s electrical signal adopts NRZ modulation pattern format
  • 8 channel data clock recovery unit (CDR) 101a is responsible for 25Gb/s electrical signal of corresponding channel
  • the data clock is conditioned, and the conditioned electrical signal is transmitted to a laser driver unit 102a of the corresponding channel, and the laser driver unit 102a is based on the electrical signal.
  • the modulation pattern format converts the electrical signal into the drive current of the light-emitting component (TOSA) 103a of the corresponding channel, and the light-emitting component (TOSA) 103a of the corresponding channel receives the drive current signal and converts it into an optical signal for transmission.
  • the above data clock recovery unit (CDR) 101a, laser driver unit (102), and light emission unit (TOSA) 103a are arranged in parallel with two sets of four channels (or eight channels).
  • the eight-channel light-emitting component (TOSA) 103a component uses eight independent, different wavelengths, labeled L0, L1, ..., L7, respectively.
  • the wavelengths of L0, L1, ..., L7 may follow the wavelength division multiplexing wavelength interval specified by IEEE802.3ba, or use other central wavelengths specified by WDM.
  • the 8:1 optical multiplexer (8:1 Optical MUX) 104a combines the 25 Gb/s optical signals transmitted by the eight-channel optical transmitting unit (TOSA) 103a into one optical signal of 200 Gb/s for transmission on the optical fiber line.
  • the data clock recovery unit (CDR) 101a and the laser driver unit 102a can be processed by one integrated 8-channel, two integrated 4-channel, four integrated 2-channel, or eight single-channel.
  • the function of the light receiving function unit 20a is to receive an optical signal of 200 Gb/s on the optical fiber line and convert it into an electric signal of 8 channels of 25 Gb/s for output, and the light receiving function unit 20a passes through the 1:8 optical demultiplexer.
  • (1:8Optical DeMUX) 201a splits the optical signal of one channel of 200Gb/s, and the wavelengths of the optical signals of the eight channels after the separation are L0, L1, ..., L7, respectively, and the center wavelength and the light emitting function unit 10a
  • the center wavelength of the eight-channel light-emitting component (TOSA) 103a corresponds.
  • each channel carries a 25Gb/s optical signal into the corresponding channel's light receiving component (ROSA) 202a.
  • the light receiving component (ROSA) 202a converts the optical signal into a corresponding photocurrent according to the size of the optical signal, and the photocurrent passes.
  • the limiting amplifier unit (TIA) 203a is amplified and converted into a voltage signal, and the converted voltage signal enters a data clock recovery unit (CDR) 204a for data clock conditioning, and the conditioned electrical signal is transmitted through a high-speed electrical signal interface.
  • the optical signal modulation pattern format can adopt NRZ.
  • the above-mentioned light receiving component unit (ROSA) 202a, limiting amplifier unit (TIA) 203a, and data clock recovery unit (CDR) 204a are two sets of four channels (or eight channels) arranged in parallel.
  • the limiting amplifier unit (TIA) 203a and the data clock recovery unit (CDR) 204a can be processed by one integrated 8-channel, two integrated 4-channel, four integrated 2-channel, or eight single-channel.
  • TX0, TX1, TX2, TX3, and RX0, RX1, RX2, and R3 are a group for transmitting and receiving an electrical signal of 100 Gb/s.
  • TX4, TX5, TX6, TX7 and RX4, RX5, RX6, RX7 are a group for transmitting and receiving another set of 100Gb/s electrical signals.
  • the above two sets of 100 Gb/s electrical signals are compatible with the existing IEEE 802.3ba standard.
  • the present embodiment differs from the above two embodiments in that the illustrated light-emitting function unit 10b includes a 2-channel PAM4 encoding unit 101b, and two-channel laser driver units 102b, 2 One channel of light emitting component unit (TOSA) 103b, 2:1 optical combiner (2:1 Optical MUX) 104b.
  • the PAM4 encoding unit 101b includes a 4:1 multiplexer (4:1 MUX) 1011b for multiplexing the electrical signals of four 25 Gb/s rate NRZ modulation patterns into one 100 Gb/s rate NRZ modulation pattern format.
  • the electrical signal, the multiplexed electrical signal is passed to the PAM4 encoder 1012b, and the PAM4 encoder 1012b converts the 100 Gb/s rate NRZ modulation pattern format into an electrical signal of the 50 Gbaud rate PAM4 modulation pattern format.
  • the electrical signal of the PAG4 modulation pattern format of the encoded 50 Gbaud rate is transmitted to a laser driver 102b, and the laser driver 102b converts the above electrical signal into a corresponding light emitting component unit (TOSA) 103b.
  • TOSA light emitting component unit
  • the current, light emission component unit (TOSA) 103b converts the drive current into a corresponding 100 Gb/s (50 Gbaud) optical signal, and the 100 Gb/s (50 Gbaud) optical signal emitted by the two-channel light-emitting component unit (TOSA) 103b passes A 2:1 optical multiplexer (2:1 Optical MUX) 104b is multiplexed and transmitted over the fiber.
  • the optical signal emitted by the two-channel light-emitting component unit (TOSA) 103b is denoted by L0 and L1, and the center wavelengths of L0 and L1 are different.
  • the center wavelength of the two channels can be the center wavelength specified by WDM, or the center wavelength is 1273.55. Any two different wavelengths of nm, 1278.89 nm, 1282.26 nm, 1286.66 nm, 1295.56 nm, 1300.05 nm, 1304.58 nm, and 1309.14 nm.
  • the function of the light-emitting function unit 10b is to receive an 8-channel 25 Gb/s rate electrical signal and convert it into a 100 Gbaud (200 Gb/s) optical signal for transmission, and the interface of each electrical signal is used.
  • the standard is the same as in the second embodiment.
  • the illustrated light receiving function unit 20b includes a 1:2 optical splitter (1:2Optical DeMUX) 201b, two channels of light receiving component units (ROSA) 202b, two channel linear amplifiers (LA) 203b, two Channel PAM4 decoding unit 204b.
  • Each of the PAM4 decoding units 204b includes an analog to digital converter (A/D) 2041b, a digital signal processing unit (DSP) 2042b, and a 1:4 demultiplexer (1:4 DeMUX) 2043b.
  • the optical signal at a rate of 100 Gbaud (200 Gb/s) is split by a 1:2 optical demultiplexer (1:2 Optical DeMUX) 201b into a 50 Gbaud (100 Gb/s) optical signal at a rate of 100 Gbaud (200 Gb/s). Rate of light signal.
  • the 50Gbaud (100Gb/s) rate optical signal after splitting is converted into a photocurrent signal through two different channels of the light receiving component unit (ROSA) 202b, and the photocurrent signal is amplified and adjusted to a voltage signal by a linear amplifier (LA) 203b, and amplified.
  • ROSA light receiving component unit
  • the post-electrical signal is transmitted to the analog-to-digital converter (A/D) 2041b in the PAM4 decoding unit 204b to convert the analog signal into a digital signal.
  • the digital signal processing unit (DSP) 2042b processes the digital signal, converts the modulation format of the PAM4 into a modulation format of the NRZ, and converts the decoded 100 Gb/s electrical signal through a 1:4 demultiplexer (1:4 DeMUX).
  • the 2043b is demultiplexed into four 25Gb/s electrical signals for transmission.
  • the present embodiment differs from the above three embodiments in that the illustrated light emitting function unit 10c includes two channels of PAM4 encoding unit 101c, four channels of laser driver units 102c, and four.
  • the PAM4 encoding unit 101c includes a 4:2 multiplexer (4:2 MUX) 1011c for multiplexing the electrical signals of the four 25 Gb/s rate NRZ modulation pattern into two 50 Gb/s electrical signals.
  • the used electrical signal is passed to the PAM4 encoder 1012c, which converts the electrical signal in the 50 Gb/s rate NRZ modulation pattern format into an electrical signal in a PAG4 modulation pattern format of two 25 Gbaud rates.
  • the electrical signal of the PAM4 modulation pattern format of the encoded 25 Gbaud rate is transmitted to a laser driver 102c, which is responsible for converting the electrical signal into a corresponding light emitting component unit (TOSA) 103c component.
  • TOSA light emitting component unit
  • the light emitting component unit (TOSA) 103c component converts the driving current into a corresponding optical signal
  • the optical signal emitted by the four-channel light emitting component unit (TOSA) 103c passes through the 4:1 optical combiner (4: 1Optical MUX) 104 is transmitted over the fiber.
  • the wavelengths of the optical signals emitted by the four-channel light-emitting component unit (TOSA) 103c are denoted as L0, L1, L2, and L3, wherein the center wavelengths of L0, L1, L2, and L3 are different, and the center wavelength of the center wavelength can be determined by the center wavelength specified by WDM.
  • any four different wavelengths of center wavelengths of 1273.55 nm, 1277.89 nm, 1282.26 nm, 1286.66 nm, 1295.56 nm, 1300.05 nm, 1304.58 nm, and 1309.14 nm are selected.
  • the illustrated light receiving function unit 20c includes a 1:4 optical splitter (1:4Optical DeMUX) 201, a 4-channel light receiving component (ROSA) 202c, a 4-channel linear amplifier (LA) 203c, and 2 channels.
  • PAM4 decoding unit 204c Each of the PAM4 decoding units 204c includes two analog-to-digital converters (A/D) 2041c, two digital signal processing units (DSP) 2042c, and a 2:4 demultiplexer (2:4 DeMUX) 2043c.
  • the optical signal is split by a 1:4 optical demultiplexer (1:4 Optical DeMUX) 201 into a 4-channel 25 Gbaud (50 Gb/s) optical signal.
  • the demultiplexed optical signal is converted into a photocurrent signal by a light receiving component (ROSA) 202c, and the photocurrent signal is amplified and regulated into a voltage signal by a linear amplifier (LA) 203c, and the amplified electrical signal is transmitted to an analog to digital converter in the PAM4 decoding unit.
  • A/D converts analog signals to digital signals, numbers
  • the signal processing unit (DSP) 2042c processes the digital signal, converts the modulation format of the PAM4 into a modulation format of the NRZ, and converts the decoded two 50Gb/s electrical signals through the 2:4 demultiplexer (2:4 DeMUX).
  • the 2043c is demultiplexed into four 25Gb/s electrical signals for transmission.
  • FIG. 7 is a schematic diagram of an application based on the invention, including a first host HOST-1401, a 2 ⁇ 100G optical transceiver module 1402, an optical transmission network 403, and a 2 ⁇ 100G optical transceiver module 2404 having multiple sets of 100G electrical interfaces.
  • a second host HOST-2 having multiple sets of 100G electrical interfaces.
  • the first host HOST-1 and the second host HOST-2 can implement multiple sets of 100G electrical interfaces by means of ASIC or FPGA (only two groups are shown in the figure), and a single 100G electrical interface can adopt two 50Gb/s
  • each 100G electrical port can support two 50Gb/s rate NRZ or PAM4 modulation format electrical signals or four 25Gb/s rate NRZ modulation format electrical signals (above Embodiment 1 corresponds to processing 2 channels of 50 Gb/s rate NRZ or PAM4 modulation format electrical signals, and Embodiments 2-4 correspond to processing 4 channels of 25 Gb/s rate NRZ modulation format electrical signals).
  • the two sets of 100G electrical signals transmitted by the first host HOST-1401 to the 2 ⁇ 100G optical transceiver module 1402 are converted into optical signals of 200 Gb/s for transmission on the optical transmission network 403, and the 2 ⁇ 100G optical transceiver module 2404 is responsible for receiving the received signals.
  • the 200G optical signal is converted into corresponding two sets of 100G electrical signals and transmitted to the second host HOST-2405, so that the 200Gb/s signal is transmitted on the optical fiber.
  • the signal sent by the second host HOST-2 can be transmitted to the first host HOST-1 in this way, thereby realizing the bidirectional transmission of the signal.
  • the optical port signal formats used in the above embodiments 1-4 are: NRZ or PAM4 at a rate of 4 waves of 50 Gb/s in the first embodiment, NRZ at a rate of 8 waves at 25 Gb/s in the second embodiment, and 2 waves in the third embodiment.
  • the PAM4 at a rate of 100 Gb/s, Embodiment 4 is a PAM4 with a rate of 4 waves and 50 G/s. Therefore, the 2 ⁇ 100G optical transceiver module 1 and the 2 ⁇ 100G optical transceiver module 2 should be paired and used by the application shown in FIG. That is, the 2 ⁇ 100G optical transceiver module 1 and the 2 ⁇ 100G optical transceiver module 2 are simultaneously implemented by Embodiment 1, or implemented by Embodiment 2, and implemented by Embodiment 3, and implemented by Embodiment 4.
  • each channel rate and channel path of the electrical interface and the optical interface portion in order to achieve a transmission rate of 200 Gb/s, each channel rate and channel path of the electrical interface and the optical interface portion.
  • the 100G light that will comply with the IEEE802.3ba standard in the photoelectric conversion portion provided by the present invention
  • the module performs multi-channel parallel connection, and the structure of the optical path part is combined and multiplexed by the combiner, which can be used to realize the n ⁇ 100G optical transceiver module, which is limited by the module size and power consumption, and can be selected as 2 ⁇ 10.
  • the embodiments described in the present invention may be in a standard package form of CFP series or QSFP28 to be compatible with existing 100G standard products, or may be in a non-standard package form without departing from the scope of protection of this patent.
  • the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

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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

La présente invention concerne un module d'émetteur-récepteur optique de réseau Ethernet 2x100G qui comprend : une unité fonctionnelle d'émission optique, une unité fonctionnelle de réception optique et une unité fonctionnelle de commande. L'unité fonctionnelle d'émission optique reçoit une pluralité de signaux électriques ayant un débit de données de 25 Gb/s et/ou 50 Gb/s, convertit ceux-ci en un signal optique ayant un débit de données de 200 Gb/s, et transmet le signal optique à un réseau optique. L'unité fonctionnelle de réception optique reçoit, du réseau optique, un signal optique ayant un débit de données de 200 Gb/s et convertit celui-ci en une pluralité de signaux électriques ayant un débit de 25 Gb/s et/ou 50 Gb/s pour une émission. L'unité fonctionnelle de commande est connectée simultanément à l'unité fonctionnelle d'émission optique et à l'unité fonctionnelle de réception optique, et commande et détecte les états de fonctionnement de l'unité fonctionnelle d'émission optique et de l'unité fonctionnelle de réception optique. Sur la base de la norme IEEE802.3ba actuelle pour les réseaux Ethernet, le module d'émetteur-récepteur optique peut obtenir une capacité d'échange supérieure dans le cadre d'une machine standard, peut augmenter le débit de données et effectuer une émission à une vitesse supérieure, et diminuer la consommation d'énergie globale, permettant ainsi de fournir des valeurs d'application pratiques.
PCT/CN2015/099087 2015-12-24 2015-12-28 Module d'émetteur-récepteur optique 2x100g WO2017107218A1 (fr)

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