Central office transceiver device and encoding and decoding method based on ocdma two-dimensional electro-optical encoding and decoding

Abstract

The invention discloses a local side transceiving device based on OCDMA two-dimensional electro-optical coding and decoding, and a coding / decoding method thereof. The device is mainly composed of an electric time domain delay coding and decoding module, an optical frequency domain coding and decoding module, an optical coupler, a system management module and a power supply management module. The electric time domain delay coding and decoding module is connected with the optical frequency domain coding and decoding module. The electric time domain delay coding and decoding module carries out time domain delay coding on n user data electric signals issued by a core network according to a unique optical address code distributed to each user, couples the signals after time domain coding, and then sends the n user coupled electric signals to the optical frequency domain coding and decoding module for synchronous frequency domain coding according to the optical address codes. The optical frequency domain coding and decoding module converts the electric signals sent by the electric time domain delay coding and decoding module into optical signals, carries out optical frequency domain coding, and sends the optical signals after two-dimensional t-lambda coding to an optical distribution network for distribution directly or through the optical coupler. The device is characterized by simplicity, feasibility, high reconstruction, large capacity and fast speed.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to an OCDMA two-dimensional electro-optic codec-based local transceiver device and a codec method. Background technique [0002] The OCDMA-based central office transceiver device is a central office equipment used in the central office of the optical fiber access network, and is an interface device connecting the optical fiber access network with the upper core network. The central office optical transceiver device completes the encoding of the downlink data of the core network and distributes it to the optical distribution network, and decodes the uplink data from the optical distribution network and transmits it to the core network. [0003] The existing OCDMA local transceiver codec technologies mainly include: [0004] 1. t-λ two-dimensional all-optical encoding and decoding based on fiber Bragg grating (FGB) or arrayed waveguide grating (AWG) and fiber dela...

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problems of high cost, low rate and small capacity in the existing OCDMA local end transceiver codec method, and provides a local end transceiver device and its codec method based on OCDMA two-dimensional electro-optic codec

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