Polarization multiplexing system based on direct detection of Stokes space

Abstract

The invention provides a polarization multiplexing system based on direct detection of a Stokes space for realizing three-dimensional modulation on two paths of polarization states and improving the transmission rate and the dispersion tolerance of the system. The system comprises a polarization beam splitter, a single-side band modulator, an orthogonal modulator, a polarization beam combiner anda Stokes receiver, wherein the polarization beam splitter is used for dividing a light beam emitted by a laser into two orthogonal polarization states, wherein the first polarization state loads a single-side band signal, and a second polarization state loads a complex signal; the single-side band modulator is used for carrying out single-side band modulation on the single-side band signal loadedby the first polarization state; the orthogonal modulator is used for carrying out quadrature modulation on the complex signal loaded by the second polarization state; the polarization beam combiner is used for synthesizing the modulated signals on the first polarization state and the second polarization state into a polarization multiplexing signal to be transmitted out; and the Stokes receiver is used for receiving the polarization multiplexing signals, processing the received polarization multiplexing signal, and restoring the single-side band signal and the complex signal. The invention relates to the field of short-distance high-rate optical communication.

Description

technical field [0001] The invention relates to the field of short-distance high-speed optical communication, in particular to a polarization multiplexing system based on Stokes space direct detection. Background technique [0002] With the vigorous development of technologies such as big data and cloud computing, the number of network traffic and data centers is increasing day by day, and the capacity of a single data set exceeds dozens of TB (Terabyte-10 12 ) or even PB is not uncommon, which makes the efficient interconnection and communication between data centers a bottleneck. Due to the optical transmission interconnection between data centers, it has the characteristics of short distance, high interface density, complex wiring, and a large number of devices. However, because coherent reception has many cost limitations, direct detection technology (DD) is usually considered in short-distance optical communication. At present, direct detection technology is combined ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a polarization multiplexing system based on Stokes space direct detection to solve the problems of low transmission rate and low dispersion tolerance existing in the prior art

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