An optical encoder/decoder based on wss code reconstruction

Abstract

The invention relates to the field of optical signal processing in optical communication systems and discloses a method for encoding and decoding optical signals on a raster and structures of an optical encoder and an optical decoder to solve the safety problem of eavesdropping existing in an existing optical communication system. The method and the structures are characterized in that according to the technology, the optical signals are encoded and decoded on the raster based on a wavelength selective switch (WSS) and by combining an optical fiber delay line network, and code word dynamic reconstitution of optical encoding and optical decoding can be achieved. The method and the structures have the advantages that the outstanding advantages that the code word dynamic reconstitution amount of optical encoding and decoding is large, the dynamic change range is large, remote software controllability can be achieved, mobile parts do not exist, reliability is high, the insertion loss is low and the power consumption is low are achieved, so that the interception resisting capability of the optical communication system is greatly improved, and the safe transmission of the optical signals is ensured. The technology can be widely applied to optical information safe transmission in the field of optical communication (optical fiber communication and wireless optical communication).

Description

【Technical field】 [0001] The invention relates to the field of optical signal processing in optical communication systems, in particular to an optical encoder / decoder based on WSS code reconstruction. 【Background technique】 [0002] In order to improve the security of the optical fiber communication system, optical code division multiple access (OCDMA) technology is used to optically encode the optical signal transmitted by the optical fiber communication system, and perform optical decoding at the receiving end, only as an optical decoder Only when the optical encoder is matched with the optical encoder can the original signal be obtained. If the optical decoder does not match the optical encoder, the original signal cannot be recovered, and what is obtained is noise, so it has the function of anti-interception; but the optical encoding and optical encoding of the conventional OCDMA system The decoding is fixed, which can prevent general eavesdropping. For eavesdroppers wit...

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Problems solved by technology

[0005] In order to solve the problems in the prior art, the present invention provides an optical coder / decoder based on WSS code reconstruction, which solves the problems of the code reconstruction optical codec technology in the prior art that the number of code reconstructions is small and the code changes are affected. limitations, and the inability to perform remote control and other defects

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