Optical module and electric domain dispersion compensation method thereof

Abstract

The invention discloses an optical module and an electric domain dispersion compensation method thereof. The optical module comprises an optical path assembly, a laser receiving unit, an EDC chip and a first MCU (microprogrammed control unit); the laser receiving unit receives a downlink optical signal sent from an optical fiber by the optical path assembly, converts the optical signal into an electrical signal and amplifies and outputs the electrical signal to the EDC chip; the EDC chip judges the time delay and distortion of the electrical signal outputted from the laser receiving unit and sends the judged time delay and distortion information to the first MCU; the first MCU computes a dispersion compensation value according to the received time delay and distortion information and outputs the value to the EDC chip; and the EDC chip performs electric domain dispersion compensation on the electrical signal outputted from the laser receiving unit according to the dispersion compensation value and outputs the electrical signal. The EDC chip is arranged in the optical module, and the electrical signal after the photoelectrical conversion is subjected to the electric domain dispersion compensation at the EDC chip in the optical module, so the dispersion compensation effect of the electrical signal is better.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to an optical module and an electrical domain dispersion compensation method thereof. Background technique [0002] In the optical fiber transmission system, after the optical signal is transmitted through tens of kilometers or even hundreds of kilometers of optical fiber, chromatic dispersion and polarization mode dispersion will occur. The existence of these dispersion phenomena causes pulse broadening and intersymbol interference of the optical signal. In this way, after the optical signal transmitted by the optical fiber is converted into an electrical signal, a large time delay and distortion will be generated, which will cause a large bit error rate of the signal and limit the transmission capacity and transmission bandwidth of the optical fiber. [0003] At present, for the dispersion phenomenon of optical signals in optical fiber transmission, dispersion ...

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Problems solved by technology

[0008] However, the inventors of the present invention have found that the electrical dispersion compensation method of the prior art is not effective in compensating electrical signals; after analysis, it is found that before the EDC chip in the OLT system equipment performs electrical dispersion compensation on electrical signals, The electrical signal needs to be transmitted from the OLT optical module to the OLT system equipment, and the transmission distance is long, which causes further loss and attenuation of the electrical signal, causing greater time delay and distortion of the electrical signal, so that the EDC chip can compensate for the electrical signal not effectively

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