Optical transmitter, optical receiver and optical transceiver chip

An optical transmitter, wherein comprising:

• N light sources with different wavelengths;
• m levels of beam splitting section, comprising m levels of beam splitter section and at least one level waveguide crossing section, wherein each level of the waveguide crossing section comprises N×2m channels, a k-th level beam splitter section comprises a plurality of beam splitters in a number of N×2k−1, both N and m are positive integers greater than 1, a value range of k is from 1 to m, the m levels of beam splitting section can be expanded as needed;
• a first level beam splitter section divides an optical signal coming from the N light sources with different wavelengths into an N×21-channel output signal;
• a k+1-th level beam splitter section divides an N×2k-channel output signal coming from a k-th level beam splitter section into an N×2k+1-channel output signal, an output signal of each channel has one output power;
• a plurality of function blocks in a number of N×2m and a plurality of multiplexers in a number of 2m, wherein, a plurality of output signals of N×2m channels split and generated by an m-th level beam splitting section, connect to the function blocks and the multiplexer in a sequence, after being cross-transmitted by the at least one level waveguide crossing section, each multiplexer is configured to combine N output signals with different wavelengths coming from N channels.

A optical receiver, wherein comprising a plurality of demultiplexers in a number of M, a photodetector and at least one level waveguide crossing section;

• the demultiplexers corresponding and connecting to a plurality of multiplexers of an optical transmitter one by one;
• the demultiplexer is configured to demultiplex the output signal coming from the multiplexer, before obtaining an output signal of N channels with different wavelengths;
• at least one level waveguide crossing section, configured to transmit an N×M-channel output signal demultiplexed and generated by the M demultiplexers to a plurality of photodetectors in a number of N×M;
• the photodetectors are corresponding to the channels of the optical receiver one by one.