Single-wavelength 100G light module and 5G fronthaul network

A single-wavelength, optical module technology, applied in the field of optical communication, can solve the problems of high-speed data transmission, high single-channel rate of optical modules, transmission rate bottlenecks, etc., to reduce the use of optical cables, simplify wiring methods, and reduce costs. Effect

Inactive Publication Date: 2019-04-12
JIANGSU HENGTONG OPTICAL NETWORK TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used 100G QSFP28 series optical module adopts a transceiver integrated module, which integrates one 4*25Gb/s rate optical transmission unit and one parallel 4*25Gb/s rate optical receiving unit. All openings make the transmission rate a bottleneck
With the development of optical communication products, especially the demand for 5G front...

Method used

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  • Single-wavelength 100G light module and 5G fronthaul network
  • Single-wavelength 100G light module and 5G fronthaul network
  • Single-wavelength 100G light module and 5G fronthaul network

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Embodiment 1

[0047] This embodiment discloses a single-wavelength 100G optical module, including an optical transmitting unit and an optical receiving unit. The optical transmitting unit receives one NRZ electrical signal at a rate of 100G / s, and encodes and converts one NRZ electrical signal at a rate of 100G / s into one 50G / s four-level electrical signal, and convert one 50G / s four-level electrical signal into one 50G / s PAM4 optical signal and transmit it;

[0048] The above-mentioned optical receiving unit receives a PAM4 optical signal at a rate of 50G / s, converts a PAM4 optical signal at a rate of 50G / s into a four-level electrical signal at a rate of 50G / s, and converts a four-level electrical signal at a rate of 50G / s The electrical signal is decoded and converted into a 100G / s rate NRZ electrical signal output.

[0049] Specifically, such as figure 1 As shown, the above-mentioned light emitting unit includes a first DSP processor, a laser driver and a laser transmitter; the above-m...

Embodiment 2

[0058] Under the same maximum signal amplitude, the PAM4 signal uses four levels for signal transmission, and the amplitude difference between every two adjacent levels is only one-third of that of the NRZ signal, and the signal is easily interfered by noise. generate bit errors, in order to solve this technical problem, this embodiment also provides a single-wavelength module, such as figure 2 As shown, it includes the light emitting unit and the light receiving unit in Embodiment 1, and also includes two single-channel clock recovery units, and the two single-channel clock recovery units are respectively used in the light emitting unit and the light receiving unit. The single-channel clock recovery unit on the optical transmitter unit is used to correct the bit error of an input NRZ electrical signal at a rate of 100G / s, and perform PAM4 encoding on the NRZ electrical signal after bit error correction. The single-channel clock recovery unit on the optical receiving unit is ...

Embodiment 3

[0061] This embodiment discloses a single-wavelength 100G optical module, such as image 3 As shown, it includes the light emitting unit and the light receiving unit of the first embodiment, and also includes a QSFP28 electrical signal connector, the above-mentioned QSFP28 electrical signal connector has a first electrical signal interface and a second electrical signal interface, and the above-mentioned first electrical signal interface output a 100G / s rate NRZ electrical signal to the first DSP processor; output a 100G / s NRZ electrical signal output by the second DSP processor through the second electrical signal interface.

[0062] The QSFP28 electrical signal connector used is fully compatible with existing 100G switch interfaces.

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PUM

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Abstract

The invention discloses a single-wavelength 100G light module. The module includes a light emitting unit and a light receiving unit. The light emitting unit receives a 100G/s-rate NRZ electrical signal, encodes and converts the 100G/s-rate NRZ electrical signal into a 50G/s-rate four-level electrical signal, and converts the 50G/s-rate four-level electrical signal into a 50G/s-rate PAG4 (Pulse Amplitude Modulation) light signal for emitting; and the light receiving unit receives the 50M/s-rate PAM4 light signal, converts the 50G/s-rate PAM4 light signal into a 50G/s-rate four-level electricalsignal, and decodes and converts the 50G/s-rate four-level electrical signal into a 100G/s-rate NRZ electrical signal for output. The single-wavelength 100G light module of the invention can support single-path 100Gb/s-rate transmission service, reduce use quantity of light devices, reduce costs of the light module, and be completely compatible with existing 100G switch interfaces at the same time.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and relates to an optical transceiver module based on PAM4 (Pulse Amplitude Modulation) modulation, in particular to a single-wavelength optical transceiver module which adopts the PAM4 modulation format to realize QSFP28. It also relates to a 5G fronthaul network using the single-wavelength 100G optical module. Background technique [0002] In recent years, the rapid development of application markets such as big data, cloud computing, 5G, Internet of Things, and artificial intelligence has led to explosive growth of global data, which has higher and higher requirements for Internet bandwidth. How to maximize the use of existing networks Optimizing the cost of basic resources and doubling the data transmission rate has become the biggest challenge. At present, transmission methods based on 10Gb / s, 25Gb / s, and 28Gb / s NRZ formats are commonly used in backplane, system, and short-dis...

Claims

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Application Information

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IPC IPC(8): H04B10/40H04B10/50H04B10/572H04J14/02
CPCH04B10/40H04B10/503H04B10/572H04J14/0241
Inventor 赵关宝施伟明徐虎刘沛东吴敏宋歆佳
Owner JIANGSU HENGTONG OPTICAL NETWORK TECH CO LTD
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