Ultra-dense wavelength division multiplexing system and method

Abstract

The invention provides an ultra-dense wavelength division multiplexing system and a method. The system comprises N optical frequency comb wavelength division multiplexing subsystems and a coupler, wherein the N optical frequency comb wavelength division multiplexing subsystems are used for outputting wave combining signals, and N is an integer which is more than or equal to 2; and the coupler is used for carrying out interleave multiplexing on the wave combining signals output by the N optical frequency comb wavelength division multiplexing subsystems so as to combine into one path of signals. Each optical frequency comb wavelength division multiplexing subsystem comprises an optical frequency comb, a wave separator, K modulators and a wave combiner, wherein the wave separator is used for separating K optical carrier signals from the optical frequency comb, and K is an integer which is more than or equal to 1; the K modulators are connected with the output end of the wave separator; and the wave combiner is connected with the output ends of the K modulators. According to the invention, the ultra-dense wavelength division multiplexing is realized by a plurality of the optical frequency comb wavelength division multiplexing subsystems, and the realization is simple.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to an ultra-dense wavelength division multiplexing system and method. Background technique [0002] In a wavelength division multiplexing (WDM) system of a passive optical fiber network (PON), the optical line terminal OLT needs to generate multi-user downlink data signals. [0003] At present, there are two main methods: one is to integrate multiple channels of distributed feedback lasers and modulators on-chip, and then couple the multiplexed modulated signals into the same fiber for transmission; the other is to use a single optical frequency comb Generates multiple optical carrier signals with equally spaced frequencies, modulates each optical carrier signal, and couples the multiple multiplex modulated signals into the same fiber for transmission. [0004] Both schemes have their own drawbacks. For the first method, since the frequency shift of each laser is a random proc...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an ultra-dense wavelength division multiplexing system and method to solve the technical problem of how to use an optical frequency comb to realize ultra-dense wavelength division multiplexing

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