WO2017107218A1 - 一种2×100g光收发模块 - Google Patents

一种2×100g光收发模块 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)
French (fr)
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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/zh

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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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Abstract

本发明涉及一种2×100G以太网光收发模块，包括：光发射功能单元、光接收功能单元和控制功能单元；其中，所述光发射功能单元，接收多路25Gb/s和/或50Gb/s速率的电信号并转换为1路200Gb/s速率的光信号发射到光纤线路上；所述光接收功能单元，接收光纤线路上1路200Gb/s的光信号并转换为多路25Gb/s和/或50Gb/s速率的电信号进行输出；所述控制功能单元，同时与所述光发射功能单元和所述光接收功能单元连接，控制和检测所述光发射功能单元和所述光接收功能单元的工作状态。在满足IEEE802.3ba现有以太网标准的前提下，在标准机框内实现更大的交换能力，提高数据吞吐量，实现更高速的传输，降低整体功耗的光收发模块，具有现实的应用价值。

Description

一种2×100G光收发模块 技术领域
本发明涉及光通信领域，尤其涉及一种符合IEEE802.3ba高速以太网标准的光模块，特别是一种2×100G以太网光收发模块。
背景技术
近年来随着互联网的发展，互联网用户数，应用种类、网络带宽等都呈现出爆发式的增长，对社会和人们的生活产生了巨大的影响。点到点技术、在线视频、社交网络、移动互联的发展正不断吞噬网络带宽。同时云计算、大数据等技术的飞速发展，以超级数据中心为核心的云网络，对带宽需求更为迫切。目前，100G光收发模块正在被规模化的应用和部署，为更高速率的传输提供高效的解决方案。
现阶段满足IEEE802.3ba高速以太网标准的100G光收发模块多采用CFP系列和QSFP28的封装结构，实现方式多采用4波25G速率的光收发组件，通过分合波的方式在两根光纤内进行传输。受限于光收发模块封装结构和1U机框体积大小的限制，在标准的1U机框内采用QSFP28封装形式的交换机最大交换能力不大于5Tb/s，采用CFP系列封装形式的交换机的交换能力约为4Tb/s。使得在数据中心和核心局点内为了实现更大规模的交换能力需要部署较多数量的交换机，这些交换机将占据较大的体积，消耗大量的能量，从而造成建设和维护费用较高的问题。
因此，在满足IEEE802.3ba现有以太网标准的前提下，研究一种在标准的机框内，可以实现更大的交换能力，提高数据吞吐量，实现更高速的传输，降低整体功耗的光收发模块，具有现实的应用价值。
发明内容
本发明提出了一种2×100G的光收发模块的实现方案，以解决上述问题。本发明所述的2×100G的光收发模块，通过在现有标准CFP系列或QSFP28封装尺寸下，光信号收发部分采用8波25Gb/s、4波50Gb/s或2波100Gb/s通过分合波的方式实现200Gb/s的速率在光纤内进行传输，电接口收发部分采用每 通道25Gb/s或50Gb/s的方式进行传输，可兼容OIF CEI-28G-VSR，CAUI-4，OTL4.4和OIF CEI-56G-VSR电接口标准进行数据的传输。本发明在兼容IEEE802.3ba标准的前提下，光收发单元部分通过波道扩展，单波速率提高的方式实现双纤200Gb/s的收发，从而有效提高单位体积下的数据传输能力。
本发明的技术问题通过以下的技术方案予以解决：
本发明提供了一种2×100G以太网光收发模块，包括：光发射功能单元、光接收功能单元和控制功能单元，其中：
所述光发射功能单元，接收多路25Gb/s和/或50Gb/s速率的电信号并转换为1路200Gb/s速率的光信号发射到光纤线路上；
所述光接收功能单元，接收光纤线路上1路200Gb/s的光信号并转换为多路25Gb/s和/或50Gb/s速率的电信号进行输出；
所述控制功能单元，同时与所述光发射功能单元和所述光接收功能单元连接，控制和检测所述光发射功能单元和所述光接收功能单元的工作状态。
在上述技术方案中，所述控制功能单元包括输入输出逻辑控制电路、上电时序控制电路、温度控制电路、数模和模数转换电路、存储电路，其中存储电路用于存储固件信息、模块信息、用户信息。
在上述技术方案中，所述光发射功能单元接收4个通道50Gb/s速率的电信号并转换为1路200Gb/s速率的光信号进行发射，其包括4个通道的输入端数据时钟恢复单元，4个通道的激光器驱动单元，4个通道的光发射组件单元，4:1光合波器；其中，4个通道的输入端数据时钟恢复单元负责相应通道的50Gb/s电信号的数据时钟调理，并将调理后的电信号传至相应通道的激光器驱动单元，激光器驱动单元根据电信号的调制码型格式将电信号转换成相应通道的光发射组件的驱动电流，转换的驱动电流信号大小与对应的电信号的调制码型格式相关，相应通道的光发射组件接收到驱动电流信号后将其转成光信号后发射到光纤线路进行传输；所述光接收功能单元接收光纤线路上1路200Gb/s的光信号并转换为4个通道50Gb/s速率的电信号进行输出，其包括1:4光分波器，4个通道的光接收组件单元，4个通道的线性或限幅放大器单元，4个通道的输出端数据时钟恢复单元；其中，1:4光分波器对1路200Gb/s的光信号进行分波，分波后每通道波长携带50Gb/s的光信号进入对应通道的光接收组件，光接收组件根据光信号的大小将光信号转换为对应的光电流，光电流通过线性或限幅放大 器单元将光电流信号进行放大并转换为电压信号，转换后的电压信号进入输出端数据时钟恢复单元进行数据时钟的调理，调理后的电信号通过高速电信号接口进行传输。
在上述技术方案中，所述50Gb/s速率的电信号采用NRZ或PAM4调制码型格式。
在上述技术方案中，所述200Gb/s速率的光信号包括4个独立的不相同的波长，上述4个不相同的波长遵循IEEE802.3ba规定的波分复用波长间隔，或者上述4个不相同的波长的中心波长分别为1295.56nm、1300.05nm、1304.58nm和1309.14nm，或者上述4个不相同的波长采用其它WDM规定的中心波长。
在上述技术方案中，所述光发射功能单元接收8个通道25Gb/s速率的电信号并转换为1路200Gb/s速率的光信号进行发射，其包括8个通道的输入端数据时钟恢复单元，8个通道的激光器驱动单元，8个通道的光发射组件单元，8:1光合波器；其中，8个通道的输入端数据时钟恢复单元负责相应通道的50Gb/s电信号的数据时钟调理，并将调理后的电信号传至相应通道的激光器驱动单元，激光器驱动单元根据电信号的调制码型格式将电信号转换成相应通道的光发射组件的驱动电流，转换的驱动电流信号大小与对应的电信号的调制码型格式相关，相应通道的光发射组件接收到驱动电流信号后将其转成光信号后发射到光纤线路进行传输；所述光接收功能单元接收光纤线路上1路200Gb/s的光信号并转换为8个通道25Gb/s速率的电信号进行输出，其包括1:8光分波器，8个通道的光接收组件单元，8个通道的限幅放大器单元，8个通道的输出端数据时钟恢复单元；其中，1:8光分波器对1路200Gb/s的光信号进行分波，分波后每通道波长携带25Gb/s的光信号进入对应通道的光接收组件，光接收组件根据光信号的大小将光信号转换为对应的光电流，光电流通过限幅放大器单元将光电流信号进行放大并转换为电压信号，转换后的电压信号进入输出端数据时钟恢复单元进行数据时钟的调理，调理后的电信号通过高速电信号接口进行传输。
在上述技术方案中，所述光发射功能单元接收8个通道25Gb/s速率的电信号并转换为1路200Gb/s速率的光信号进行发射，其包括2个通道的PAM4编码单元，2个通道的激光器驱动单元，2个通道的光发射组件单元，2:1光合波器，每个通道的所述PAM4编码单元包括4:1复用器、PAM4编码器；其中，所述4:1复用器用于将4路25Gb/s速率NRZ调制码型格式的电信号复用为1路 100Gb/s速率NRZ调制码型格式的电信号，复用后的电信号传至PAM4编码器，PAM4编码器将100Gb/s速率NRZ调制码型格式转换编码为50Gbaud速率PAM4调制码型格式的电信号，并将其传至相应通道的激光器驱动单元，激光器驱动单元根据电信号的调制码型格式将电信号转换成相应通道的光发射组件的驱动电流，转换的驱动电流信号大小与对应的电信号的调制码型格式相关，相应通道的光发射组件接收到驱动电流信号后将其转成光信号后发射到光纤线路进行传输；所述光接收功能单元接收光纤线路上1路200Gb/s的光信号并转换为8个通道25Gb/s速率的电信号进行输出，其包括1:2光分波器，2个通道的光接收组件单元，2个通道的线性放大器，2个通道的PAM4解码单元，每个所述PAM4解码单元包括模数转换器、数字信号处理单元、1:4解复用器；其中，1:2光分波器对1路200Gb/s的光信号进行分波，分波后每通道波长携带50Gbaud速率的光信号进入对应通道的光接收组件，光接收组件根据光信号的大小将光信号转换为对应的光电流，光电流通过线性放大器将光电流信号进行放大并转换为电压信号，转换后的电压信号进入PAM4解码单元内的模数转换器将模拟信号转换为数字信号，数字信号处理单元对数字信号进行处理，将PAM4的调制格式转换解码为NRZ的调制格式，转换解码后的100Gb/s的电信号通过1:4解复用器解复用为4路25Gb/s速率的电信号通过高速电信号接口进行传输。
在上述技术方案中，所述光发射功能单元接收8个通道25Gb/s速率的电信号并转换为1路200Gb/s速率的光信号进行发射，其包括2个通道的PAM4编码单元，4个通道的激光器驱动单元，4个通道的光发射组件单元，4:1光合波器，每个通道的所述PAM4编码单元包括4:2复用器、PAM4编码器；其中，所述4:2复用器用于将4路25Gb/s速率NRZ调制码型格式的电信号复用为2路50Gb/s速率NRZ调制码型格式的电信号，复用后的电信号传至PAM4编码器，PAM4编码器将50Gb/s速率NRZ调制码型格式转换编码为25Gbaud速率PAM4调制码型格式的电信号，并将其传至相应通道的激光器驱动单元，激光器驱动单元根据电信号的调制码型格式将电信号转换成相应通道的光发射组件的驱动电流，转换的驱动电流信号大小与对应的电信号的调制码型格式相关，相应通道的光发射组件接收到驱动电流信号后将其转成光信号后发射到光纤线路进行传输；所述光接收功能单元接收光纤线路上1路200Gb/s的光信号并转换为8个通道25Gb/s速率的电信号进行输出，其包括1:4光分波器，4个通道的光接 收组件单元，4个通道的线性放大器，2个通道的PAM4解码单元，每个所述PAM4解码单元包括2路模数转换器、2路数字信号处理单元、2:4解复用器；其中，1:4光分波器对1路200Gb/s的光信号进行分波，分波后每通道波长携带25Gbaud速率的光信号进入对应通道的光接收组件，光接收组件根据光信号的大小将光信号转换为对应的光电流，光电流通过线性放大器将光电流信号进行放大并转换为电压信号，转换后的电压信号进入PAM4解码单元内的模数转换器将模拟信号转换为数字信号，数字信号处理单元对数字信号进行处理，将PAM4的调制格式转换解码为NRZ的调制格式，转换解码后的100Gb/s的电信号通过1:4解复用器解复用为4路25Gb/s速率的电信号通过高速电信号接口进行传输。
在上述技术方案中，所述25Gb/s速率的电信号采用NRZ调制码型格式。
本发明还提供了一种n×100G以太网光收发模块，包括：光发射功能单元、光接收功能单元和控制功能单元，其中：
所述光发射功能单元，接收多路25Gb/s和/或50Gb/s速率的电信号并转换为1路n×100Gb/s速率的光信号发射到光纤线路上；
所述光接收功能单元，接收光纤线路上1路n×100Gb/s的光信号并转换为多路25Gb/s和/或50Gb/s速率的电信号进行输出；
所述控制功能单元，同时与所述光发射功能单元和所述光接收功能单元连接，控制和检测所述光发射功能单元和所述光接收功能单元的工作状态；
其中，n为3～10。
本发明取得了以下技术效果：
光收发单元部分通过波道扩展，单波速率提高的方式，实现双纤200Gb/s的收发，提高数据传输速率，降低了模块功耗，从而极大了降低了光收发模块的成本，极具经济性，另外该技术方案满足多种电接口标准，向下兼容性优，极具灵活性。通过兼容CFP系列或QSFP28封装尺寸，可实现规模化的生产和替代，从而节约了生产和替代成本。此发明集新颖性、经济性、实用型和创造性于一体，适用于大规模生产，满足更高数据传输速率的需求。
附图说明
图1为本发明实施方式1的内部结构功能框图
图2为本发明实施方式2的内部结构功能框图
图3为本发明实施方式3的内部结构功能框图
图4为本发明实施方式4的内部结构功能框图
图5为本发明实施方式采用NRZ调制码型格式示意图
图6为本发明实施方式采用PAM4调制码型格式示意图
图7为本发明中一种应用示意图
具体实施方式
为了便于本领域普通技术人员理解和实施本发明，下面结合附图及具体实施方式对本发明作进一步的详细描述。在各图中，同一符号表示同一或相当的组件。
实施方式1
图1为本发明实施方式1的内部结构功能框图。在图1中示出了一种2×100G光收发模块，包括光发射功能单元10、光接收功能单元20和控制功能单元30。其中光发射功能单元10包括4个通道的数据时钟恢复单元(CDR)101，4个通道的激光器驱动单元(Laser Driver)102，4个通道的光发射组件单元(TOSA)103，4:1光合波器(4:1Optical MUX)104。光接收功能单元20包括1:4光分波器(1:4Optical DeMUX)201，4个通道的光接收组件单元(ROSA)202，4个通道的线性或限幅放大器单元(LA/TIA)203，4个通道的数据时钟恢复单元(CDR)204。控制功能单元30与2×100G光收发模块的输入输出信号接口连接，用于接收2×100G光收发模块的外部控制单元(图中未示出)输入的控制信息，并将2×100G光收发模块的诊断信息输出至该外部控制单元，控制功能单元30同时与光发射功能单元10和光接收功能单元20连接，控制和检测光发射功能单元10和光接收功能单元20的工作状态。控制功能单元30包括输入输出逻辑控制电路、上电时序控制电路、温度控制电路、数模和模数转换电路、存储电路，其中存储电路用于存储固件信息、模块信息、用户信息。
下面参照图1，对光收发模块的实施方式1做进一步说明。
光发射功能单元10的功能为：接收4个通道50Gb/s速率的电信号并转换为1路200Gb/s速率的光信号进行发射，各个电信号的接口可同时/分别采用OIF CEI-56G-VSR的标准或其它类似电接口标准，50Gb/s的电信号可采用如图5所 示的NRZ或如图6所示的PAM4(Pulse Amplitude Modulation)的调制码型格式，4个通道的数据时钟恢复单元(CDR)101负责相应通道的50Gb/s电信号的数据时钟调理，并将调理后的电信号传至相应通道的激光器驱动单元(Laser Driver)102，激光器驱动单元(Laser Driver)102根据电信号的调制码型格式将电信号转换成相应通道的光发射组件(TOSA)103的驱动电流，转换的驱动电流信号大小与对应的电信号的调制码型格式相关，相应通道的光发射组件(TOSA)103接收到驱动电流信号后将其转成光信号进行传输。上述的数据时钟恢复单元(CDR)101，激光器驱动单元(Laser Driver)102，光发射组件(TOSA)103均为4个通道(或两组2个通道)并行设置，其中数据时钟恢复单元(CDR)101和激光器驱动单元(Laser Driver)102可以采用1片集成4通道、2片集成2通道，或4片单通道的方式进行处理。4个通道的光发射组件(TOSA)103组件采用4个独立的不相同的波长，分别标示为L0、L1、L2、L3。其中L0、L1、L2、L3波长可遵循IEEE802.3ba规定的波分复用波长间隔，其中心波长分别为1295.56nm、1300.05nm、1304.58nm和1309.14nm或采用其它WDM规定的中心波长。4:1光合波器(4:1Optical MUX)104将4个通道的光发射组件(TOSA)103发射的50Gb/s光信号合为1路200Gb/s的光信号在光纤线路上进行传输。
光接收功能单元20的功能为：接收光纤线路上1路200Gb/s的光信号并转换为4个通道50Gb/s速率的电信号进行输出，光接收功能单元20通过1:4光分波器(1:4Optical DeMUX)201对1路200Gb/s的光信号进行分波，分波后的4个通道的光信号波长分别为L0、L1、L2、L3，其中心波长与光发射功能单元10的4个通道的光发射组件(TOSA)103的中心波长相对应。分波后每通道波长携带50Gb/s的光信号进入对应通道的光接收组件(ROSA)202，光接收组件(ROSA)202根据光信号的大小将光信号转换为对应的光电流，光电流通过线性或限幅放大器单元(LA/TIA)203放大并转换为电压信号，转换后的电压信号进入数据时钟恢复单元(CDR)204进行数据时钟的调理，调理后的电信号通过高速电信号接口进行传输。上述的光信号调制码型格式可采用PAM4或NRZ，采用PAM4调制码型格式后端需采用线性放大器进行光电流信号的放大。NRZ调制码型采用限幅放大器进行光电流信号的放大。上述光接收组件单元(ROSA)202、线性或限幅放大器单元(LA/TIA)203、数据时钟恢复单元(CDR) 204均为4个通道(或两组2个通道)并行设置。其中线性或限幅放大器单元(LA/TIA)203、数据时钟恢复单元(CDR)204可以采用1片集成4通道、2片集成2通道，或4片单通道的方式进行处理。
在图1所示TX0、TX1、TX2、TX3和RX0、RX1、RX2、RX3为本发明所述光收发模块的高速电信号接口，其电信号速率为50Gb/s，遵循OIF CEI-56G-VSR标准或其它类似电接口标准。其中TX0、TX1和RX0、RX1为一组，用于传输和接收100Gb/s的电信号。TX2、TX3和RX2、RX3为一组，用于传输和接收另一组100Gb/s的电信号。上述两组100Gb/s的电信号可兼容现有IEEE802.3ba标准。
通过上述实施方式1在兼容现有IEEE802.3ba标准的前提下可有效的提高光传输速率，同时可有效的管理和控制光收发模块的工作状态。
实施方式2
如图2所示，本实施方式与的实施方式1区别在于，高速电接口采用25Gb/s的NRZ调制码型格式进行传输和接收，遵循OIF CEI-28G-VSR，CAUI-4，OTL4.4电接口标准。所示的光发射功能单元10a包含8个通道的数据时钟恢复单元(CDR)101a，8个通道的激光器驱动单元(Laser Driver)102a，8个通道的光发射组件单元(TOSA)103a，8:1光合波器(8:1Optical MUX)104a。其中8个通道的光发射组件单元(TOSA)103a的中心波长可采用1273.55nm、1277.89nm、1282.26nm、1286.66nm、1295.56nm、1300.05nm、1304.58nm和1309.14nm或采用其它WDM规定的中心波长，分别标示为L0、L1、L2...L7。所示光接收功能单元20a包含1:8光分波器(1:8Optical DeMUX)201a，8个通道的光接收组件(ROSA)202a，8个通道的限幅放大器单元(TIA)203a，8个通道的数据时钟恢复单元(CDR)204a。
相应地，光发射功能单元10a的功能为：接收8个通道的25Gb/s速率电信号并转换为1路200Gb/s速率的光信号进行发射，各个电信号的接口可同时/分别采用CEI-28G-VSR、CAUI-4、OTL4.4电接口标准，25Gb/s的电信号采用NRZ的调制码型格式，8个通道的数据时钟恢复单元(CDR)101a负责相应通道的25Gb/s电信号的数据时钟调理，并将调理后的电信号传至相应通道的激光器驱动单元(Laser Driver)102a，激光器驱动单元(Laser Driver)102a根据电信号 的调制码型格式将电信号转换成相应通道的光发射组件(TOSA)103a的驱动电流，相应通道的光发射组件(TOSA)103a接收到驱动电流信号后将其转成光信号进行传输。上述的数据时钟恢复单元(CDR)101a，激光器驱动单元(Laser Driver)102a，光发射组件(TOSA)103a均为两组4个通道(或8个通道)并行设置。8个通道的光发射组件(TOSA)103a组件采用8个独立的不相同的波长，分别标示为L0、L1、…、L7。其中L0、L1、…、L7波长可遵循IEEE802.3ba规定的波分复用波长间隔，或采用其它WDM规定的中心波长。8:1光合波器(8:1Optical MUX)104a将8个通道的光发射组件(TOSA)103a发射的25Gb/s光信号合为1路200Gb/s的光信号在光纤线路上进行传输。其中数据时钟恢复单元(CDR)101a和激光器驱动单元(Laser Driver)102a可以采用1片集成8通道、2片集成4通道、4片集成2通道、或8片单通道的方式进行处理。
光接收功能单元20a的功能为：接收光纤线路上1路200Gb/s的光信号并转换为8个通道25Gb/s速率的电信号进行输出，光接收功能单元20a通过1:8光分波器(1:8Optical DeMUX)201a对1路200Gb/s的光信号进行分波，分波后的8个通道的光信号波长分别为L0、L1、…、L7，其中心波长与光发射功能单元10a的8个通道的光发射组件(TOSA)103a的中心波长相对应。分波后每通道波长携带25Gb/s的光信号进入对应通道的光接收组件(ROSA)202a，光接收组件(ROSA)202a根据光信号的大小将光信号转换为对应的光电流，光电流通过限幅放大器单元(TIA)203a放大并转换为电压信号，转换后的电压信号进入数据时钟恢复单元(CDR)204a进行数据时钟的调理，调理后的电信号通过高速电信号接口进行传输，上述的光信号调制码型格式可采用NRZ。上述光接收组件单元(ROSA)202a、限幅放大器单元(TIA)203a、数据时钟恢复单元(CDR)204a均为两组4个通道(或8个通道)并行设置。其中限幅放大器单元(TIA)203a、数据时钟恢复单元(CDR)204a可以采用1片集成8通道、2片集成4通道、4片集成2通道、或8片单通道的方式进行处理。
与实施方式1类似，其中TX0、TX1、TX2、TX3和RX0、RX1、RX2、R3为一组，用于传输和接收100Gb/s的电信号。TX4、TX5、TX6、TX7和RX4、RX5、RX6、RX7为一组，用于传输和接收另一组100Gb/s的电信号。上述两组100Gb/s的电信号可兼容现有IEEE802.3ba标准。
实施方式3
如图3所示，本实施方式与上述两种实施方式的区别在于，所示光发射功能单元10b包含2个通道的PAM4编码单元101b，2个通道的激光器驱动单元(Laser Driver)102b，2个通道的光发射组件单元(TOSA)103b，2:1光合波器(2:1Optical MUX)104b。其中PAM4编码单元101b包含4:1复用器(4:1MUX)1011b，用于将4路25Gb/s速率NRZ调制码型格式的电信号复用为1路100Gb/s速率NRZ调制码型格式的电信号，复用后的电信号传至PAM4编码器1012b，PAM4编码器1012b将100Gb/s速率NRZ调制码型格式转换编码为50Gbaud速率PAM4调制码型格式的电信号。编码后50Gbaud速率的PAM4调制码型格式的电信号传至激光器驱动单元(Laser Driver)102b，激光器驱动单元(Laser Driver)102b将上述电信号转换为对应的光发射组件单元(TOSA)103b的驱动电流，光发射组件单元(TOSA)103b将驱动电流转换为相应的100Gb/s(50Gbaud)光信号，两个通道的光发射组件单元(TOSA)103b发射出的100Gb/s(50Gbaud)光信号通过2:1的光合波器(2:1Optical MUX)104b合波后在光纤上进行传输。两个通道的光发射组件单元(TOSA)103b发射出的光信号波长标示为L0和L1，L0和L1的中心波长不相同，其中心波长可采用WDM规定的中心波长，或选用中心波长为1273.55nm、1277.89nm、1282.26nm、1286.66nm、1295.56nm、1300.05nm、1304.58nm和1309.14nm中任意两个不同的波长。
相应地，光发射功能单元10b的功能为：接收8个通道的25Gb/s速率电信号并转换为1路100Gbaud(200Gb/s)速率的的光信号进行发射，各个电信号的接口所采用的标准与实施方式2相同。
所示的光接收功能单元20b包含1:2光分波器(1:2Optical DeMUX)201b，两个通道的光接收组件单元(ROSA)202b，两个通道的线性放大器(LA)203b，两个通道的PAM4解码单元204b。其中每个PAM4解码单元204b包括模数转换器(A/D)2041b、数字信号处理单元(DSP)2042b、1:4解复用器(1:4DeMUX)2043b。100Gbaud(200Gb/s)速率的光信号通过1:2光分波器(1:2Optical DeMUX)201b将1路100Gbaud(200Gb/s)速率的光信号分波为两个通道的50Gbaud(100Gb/s)速率的光信号。分波后的50Gbaud(100Gb/s)速率光信号经过两个不同通道的光接收组件单元(ROSA)202b转换为光电流信号，光电流信号经线性放大器(LA)203b放大调理为电压信号，放大后电信号传送至PAM4解码单元204b内模数转换器(A/D)2041b将模拟信号转换为数字信号， 数字信号处理单元(DSP)2042b对数字信号进行处理，将PAM4的调制格式转换解码为NRZ的调制格式，转换解码后的100Gb/s的电信号通过1:4解复用器(1:4DeMUX)2043b解复用为4路25Gb/s速率的电信号进行传输。
实施方式4
如图4所示，本实施方式与上述三种实施方式区别在于，所示光发射功能单元10c包含2个通道的PAM4编码单元101c，4个通道的激光器驱动单元(Laser Driver)102c，4个通道的光发射组件单元(TOSA)103c，4:1光合波器(4:1Optical MUX)104。其中PAM4编码单元101c包含4:2复用器(4:2MUX)1011c，用于将4路25Gb/s速率NRZ调制码型格式的电信号复用为2路50Gb/s速率的电信号，复用后的电信号传至PAM4编码器1012c，PAM4编码器1012c将50Gb/s速率NRZ调制码型格式的电信号转换编码为两路25Gbaud速率的的PAM4调制码型格式的电信号。编码后25Gbaud速率的PAM4调制码型格式的电信号传至激光器驱动单元(Laser Driver)102c，激光器驱动单元(Laser Driver)102c负责将电信号转换为对应的光发射组件单元(TOSA)103c组件的驱动电流，光发射组件单元(TOSA)103c组件将驱动电流转换为相应的光信号，4个通道的光发射组件单元(TOSA)103c发射出的光信号通过4:1的光合波器(4:1Optical MUX)104在光纤上进行传输。4个通道光发射组件单元(TOSA)103c发射的光信号波长标示为L0、L1、L2、L3，其中L0、L1、L2、L3的中心波长不相同，其中心波长可采用WDM规定的中心波长，或选用中心波长为1273.55nm、1277.89nm、1282.26nm、1286.66nm、1295.56nm、1300.05nm、1304.58nm和1309.14nm中任意四个不同的波长。
所示的光接收功能单元20c包含1:4光分波器(1:4Optical DeMUX)201，4个通道的光接收组件(ROSA)202c，4个通道的线性放大器(LA)203c，2个通道的PAM4解码单元204c。其中每个PAM4解码单元204c包括2路模数转换器(A/D)2041c、2路数字信号处理单元(DSP)2042c、2:4解复用器(2:4DeMUX)2043c。光信号通过1:4光分波器(1:4Optical DeMUX)201将1路100Gbaud(200Gb/s)速率的光信号分波为4通道25Gbaud(50Gb/s)速率的光信号。分波后的光信号经过光接收组件(ROSA)202c转换为光电流信号，光电流信号经线性放大器(LA)203c放大调理为电压信号，放大后电信号传送至PAM4解码单元内模数转换器(A/D)2041c将模拟信号转换为数字信号，数字 信号处理单元(DSP)2042c对数字信号进行处理，将PAM4的调制格式转换解码为NRZ的调制格式，转换解码后的两路50Gb/s的电信号通过2:4解复用器(2:4DeMUX)2043c解复用为4路25Gb/s速率的电信号进行传输。
图7示出了一种基于此发明的应用示意图，包括具有多组100G电接口的第一主机HOST-1401，2×100G光收发模块1402，光传输网络403，2×100G光收发模块2404，具有多组100G电接口的第二主机HOST-2。其中第一主机HOST-1和第二主机HOST-2可采用ASIC或FPGA的方式实现其多组100G电接口(图中仅示出两组)，单个100G电接口可采用2路50Gb/s的NRZ或PAM4的调制格式或4路25Gb/s NRZ的调制格式实现。2×100G的电接口采用2组100G的电接口实现，每个100G电口可支持2路50Gb/s速率NRZ或PAM4调制格式的电信号或4路25Gb/s速率NRZ调制格式电信号(上述实施方式1对应处理2路50Gb/s速率NRZ或PAM4调制格式电信号，上述实施方式2-4对应处理4路25Gb/s速率NRZ调制格式电信号)。第一主机HOST-1401的两组100G电信号传输至2×100G光收发模块1402转换成200Gb/s的光信号在光传输网络403上进行传输，2×100G光收发模块2404负责将接收到的200G光信号转换为对应的2组100G电信号传输至第二主机HOST-2405，实现200Gb/s的信号在光纤上进行传输。同时第二主机HOST-2发出的信号通过此方式可传输至第一主机HOST-1，从而实现信号的双向传输。
上述实施方式1-4所使用的光口信号格式分别为：实施方式1为4波50Gb/s速率的NRZ或PAM4，实施方式2为8波25Gb/s速率的NRZ，实施方式3为2波100Gb/s速率的PAM4，实施方式4为4波50G/s速率的PAM4，因此，由图7所示的应用示意中2×100G光收发模块1和2×100G光收发模块2应配对使用，即2×100G光收发模块1和2×100G光收发模块2同时采用实施方式1实现，或同时采用实施方式2实现，同时采用实施方式3实现，同时采用实施方式4实现。
由此，本领域技术人员应当可以更一般地理解，对于本发明提供的这种2×100G光收发模块，为了实现200Gb/s的传输速率，其电接口和光接口部分的每通道速率和通道路数，均需要满足关系M*N＝200Gb/s，式中：M为电接口或光接口对应实现的通道路数；N为电接口或光接口每路通道对应的速率。
通过本发明提供的这种在光电转换部分将遵循IEEE802.3ba标准的100G光 模块进行多路并联，在光路部分由合波器进行合波复用的结构，可以用来实现n×100G光收发模块，受限于模块尺寸和功耗等因素，n可选定为2～10。在本发明中所述的实施方案可采用CFP系列或QSFP28的标准封装形式以兼容现有100G标准产品，亦可采用非标准封装形式，并不脱离此专利的保护范围。
在本发明中实施方案中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上的单元集成在一个单元中。上述集成的单元即可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
以上实施方案仅用以说明本发明的技术方案，而非对其限制；尽管参照实施方案对本发明进行了详细说明，但对于本领域技术人员应对理解：其依然可以对前述各实施例所记载的技术方案进行修改，可在形式上和细节上对本发明做出各种变化，其并未脱离本专利的技术与精神。

Claims (10)

  1. 一种2×100G以太网光收发模块，包括：光发射功能单元(10、10a、10b、10c)、光接收功能单元(20、20a、20b、20c)和控制功能单元(30、30a、30b、30c)，其特征在于：
    所述光发射功能单元(10、10a、10b、10c)，接收多路25Gb/s和/或50Gb/s速率的电信号并转换为1路200Gb/s速率的光信号发射到光纤线路上；
    所述光接收功能单元(20、20a、20b、20c)，接收光纤线路上1路200Gb/s的光信号并转换为多路25Gb/s和/或50Gb/s速率的电信号进行输出；
    所述控制功能单元(30、30a、30b、30c)，同时与所述光发射功能单元(10、10a、10b、10c)和所述光接收功能单元(20、20a、20b、20c)连接，控制和检测所述光发射功能单元(10、10a、10b、10c)和所述光接收功能单元(20、20a、20b、20c)的工作状态。
  2. 根据权利要求1所述的2×100G以太网光收发模块，其特征在于：所述控制功能单元(30、30a、30b、30c)包括输入输出逻辑控制电路、上电时序控制电路、温度控制电路、数模和模数转换电路、存储电路，其中存储电路用于存储固件信息、模块信息、用户信息。
  3. 根据权利要求1所述的2×100G以太网光收发模块，其特征在于：
    所述光发射功能单元(10)接收4个通道50Gb/s速率的电信号并转换为1路200Gb/s速率的光信号进行发射，其包括4个通道的输入端数据时钟恢复单元(101)，4个通道的激光器驱动单元(102)，4个通道的光发射组件单元(103)，4:1光合波器(104)；其中，4个通道的输入端数据时钟恢复单元(101)负责相应通道的50Gb/s电信号的数据时钟调理，并将调理后的电信号传至相应通道的激光器驱动单元(102)，激光器驱动单元(102)根据电信号的调制码型格式将电信号转换成相应通道的光发射组件(103)的驱动电流，转换的驱动电流信号大小与对应的电信号的调制码型格式相关，相应通道的光发射组件(103)接收到驱动电流信号后将其转成光信号后发射到光纤线路进行传输；
    所述光接收功能单元(20)接收光纤线路上1路200Gb/s的光信号并转换为4个通道50Gb/s速率的电信号进行输出，其包括1:4光分波器(201)，4个通道的光接收组件单元(202)，4个通道的线性或限幅放大器单元(203)，4个通道的输出端数据时钟恢复单元(204)；其中，1:4光分波器(201)对1路200Gb/s的光信号进行分波，分波后每通道波长携带50Gb/s的光信号进入对应通道的光接收组件(202)，光接收组件(202)根据光信号的大小将光信号转换为对应的光电流，光电流通过线性或限幅放大器单元(203)将光电流信号进行放大并转换为电压信号，转换后的电压信号进入输出端数据时钟恢复单元(204)进行数据时钟的调理，调理后的电信号通过高速电信号接口进行传输。
  4. 根据权利要求3所述的2×100G以太网光收发模块，其特征在于：所述50Gb/s速率的电信号采用NRZ或PAM4调制码型格式。
  5. 根据权利要求3所述的2×100G以太网光收发模块，其特征在于：所述200Gb/s速率的光信号包括4个独立的不相同的波长，上述4个不相同的波长遵循IEEE802.3ba规定的波分复用波长间隔，或者上述4个不相同的波长的中心波长分别为1295.56nm、1300.05nm、1304.58nm和1309.14nm，或者上述4个不相同的波长采用其它WDM规定的中心波长。
  6. 根据权利要求1所述的2×100G以太网光收发模块，其特征在于：
    所述光发射功能单元(10a)接收8个通道25Gb/s速率的电信号并转换为1路200Gb/s速率的光信号进行发射，其包括8个通道的输入端数据时钟恢复单元(101a)，8个通道的激光器驱动单元(102a)，8个通道的光发射组件单元(103a)，8:1光合波器(104a)；其中，8个通道的输入端数据时钟恢复单元(101a)负责相应通道的50Gb/s电信号的数据时钟调理，并将调理后的电信号传至相应通道的激光器驱动单元(102a)，激光器驱动单元(102a)根据电信号的调制码型格式将电信号转换成相应通道的光发射组件(103a)的驱动电流，转换的驱动电流信号大小与对应的电信号的调制码型格式相关，相应通道 的光发射组件(103a)接收到驱动电流信号后将其转成光信号后发射到光纤线路进行传输；
    所述光接收功能单元(20a)接收光纤线路上1路200Gb/s的光信号并转换为8个通道25Gb/s速率的电信号进行输出，其包括1:8光分波器(201a)，8个通道的光接收组件单元(202a)，8个通道的限幅放大器单元(203a)，8个通道的输出端数据时钟恢复单元(204a)；其中，1:8光分波器(201a)对1路200Gb/s的光信号进行分波，分波后每通道波长携带25Gb/s的光信号进入对应通道的光接收组件(202a)，光接收组件(202a)根据光信号的大小将光信号转换为对应的光电流，光电流通过限幅放大器单元(203a)将光电流信号进行放大并转换为电压信号，转换后的电压信号进入输出端数据时钟恢复单元(204a)进行数据时钟的调理，调理后的电信号通过高速电信号接口进行传输。
  7. 根据权利要求1所述的2×100G以太网光收发模块，其特征在于：
    所述光发射功能单元(10b)接收8个通道25Gb/s速率的电信号并转换为1路200Gb/s速率的光信号进行发射，其包括2个通道的PAM4编码单元(101b)，2个通道的激光器驱动单元(102b)，2个通道的光发射组件单元(103b)，2:1光合波器(104b)，每个通道的所述PAM4编码单元(101b)包括4:1复用器(1011b)、PAM4编码器(1012b)；其中，所述4:1复用器(1011b)用于将4路25Gb/s速率NRZ调制码型格式的电信号复用为1路100Gb/s速率NRZ调制码型格式的电信号，复用后的电信号传至PAM4编码器(1012b)，PAM4编码器(1012b)将100Gb/s速率NRZ调制码型格式转换编码为50Gbaud速率PAM4调制码型格式的电信号，并将其传至相应通道的激光器驱动单元(102b)，激光器驱动单元(102b)根据电信号的调制码型格式将电信号转换成相应通道的光发射组件(103b)的驱动电流，转换的驱动电流信号大小与对应的电信号的调制码型格式相关，相应通道的光发射组件(103b)接收到驱动电流信号后将其转成光信号后发射到光纤线路进行传输；
    所述光接收功能单元(20b)接收光纤线路上1路200Gb/s的光信号并转换为8个通道25Gb/s速率的电信号进行输出，其包括1:2光分波器(201b)，2个通道的光接收组件单元(202b)，2个通道的线性放大器(203b)，2个通道的PAM4解码单元(204b)，每个所述PAM4解码单元(204b)包括模数转换器(2041b)、数字信号处理单元(2042b)、1:4解复用器(2043b)；其中，1:2光分波器(201a)对1路200Gb/s的光信号进行分波，分波后每通道波长携带50Gbaud速率的光信号进入对应通道的光接收组件(202b)，光接收组件(202b)根据光信号的大小将光信号转换为对应的光电流，光电流通过线性放大器(203b)将光电流信号进行放大并转换为电压信号，转换后的电压信号进入PAM4解码单元(204b)内的模数转换器(2041b)将模拟信号转换为数字信号，数字信号处理单元(2042b)对数字信号进行处理，将PAM4的调制格式转换解码为NRZ的调制格式，转换解码后的100Gb/s的电信号通过1:4解复用器(2043b)解复用为4路25Gb/s速率的电信号通过高速电信号接口进行传输。
  8. 根据权利要求1所述的2×100G以太网光收发模块，其特征在于：
    所述光发射功能单元(10c)接收8个通道25Gb/s速率的电信号并转换为1路200Gb/s速率的光信号进行发射，其包括2个通道的PAM4编码单元(101c)，4个通道的激光器驱动单元(102c)，4个通道的光发射组件单元(103c)，4:1光合波器(104c)，每个通道的所述PAM4编码单元(101c)包括4:2复用器(1011c)、PAM4编码器(1012c)；其中，所述4:2复用器(1011c)用于将4路25Gb/s速率NRZ调制码型格式的电信号复用为2路50Gb/s速率NRZ调制码型格式的电信号，复用后的电信号传至PAM4编码器(1012c)，PAM4编码器(1012c)将50Gb/s速率NRZ调制码型格式转换编码为25Gbaud速率PAM4调制码型格式的电信号，并将其传至相应通道的激光器驱动单元(102c)，激光器驱动单元(102c)根据电信号的调制码型格式将电信号转换成相应通道的光发射组件(103c)的驱动电流，转换的驱动电流信号大小与对 应的电信号的调制码型格式相关，相应通道的光发射组件(103c)接收到驱动电流信号后将其转成光信号后发射到光纤线路进行传输；
    所述光接收功能单元(20c)接收光纤线路上1路200Gb/s的光信号并转换为8个通道25Gb/s速率的电信号进行输出，其包括1:4光分波器(201c)，4个通道的光接收组件单元(202c)，4个通道的线性放大器(203c)，2个通道的PAM4解码单元(204c)，每个所述PAM4解码单元(204c)包括2路模数转换器(2041c)、2路数字信号处理单元(2042c)、2:4解复用器(2043c)；其中，1:4光分波器(201c)对1路200Gb/s的光信号进行分波，分波后每通道波长携带25Gbaud速率的光信号进入对应通道的光接收组件(202c)，光接收组件(202c)根据光信号的大小将光信号转换为对应的光电流，光电流通过线性放大器(203c)将光电流信号进行放大并转换为电压信号，转换后的电压信号进入PAM4解码单元(204c)内的模数转换器(2041c)将模拟信号转换为数字信号，数字信号处理单元(2042c)对数字信号进行处理，将PAM4的调制格式转换解码为NRZ的调制格式，转换解码后的100Gb/s的电信号通过1:4解复用器(2043c)解复用为4路25Gb/s速率的电信号通过高速电信号接口进行传输。
  9. 根据权利要求6-8中任一项所述的2×100G以太网光收发模块，其特征在于：所述25Gb/s速率的电信号采用NRZ调制码型格式。
  10. 一种n×100G以太网光收发模块，包括：光发射功能单元、光接收功能单元和控制功能单元，其特征在于：
    所述光发射功能单元，接收多路25Gb/s和/或50Gb/s速率的电信号并转换为1路n×100Gb/s速率的光信号发射到光纤线路上；
    所述光接收功能单元，接收光纤线路上1路n×100Gb/s的光信号并转换为多路25Gb/s和/或50Gb/s速率的电信号进行输出；
    所述控制功能单元，同时与所述光发射功能单元和所述光接收功能单元连 接，控制和检测所述光发射功能单元和所述光接收功能单元的工作状态；
    其中，n为3～10。
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CN104601244A (zh) * 2014-12-22 2015-05-06 武汉电信器件有限公司 一种400Gb/s热插拔高速光收发模块
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