Receiving device, sending device, system and method for photolytic polarization multiplexing

Abstract

The present invention discloses a receiving apparatus, a sending apparatus, a system and a method for optical polarization division multiplexing. The receiving apparatus includes: an optical splitter, configured to: split a received polarization-multiplexed optical signal into two identical polarization-multiplexed optical signals, where the two polarization-multiplexed optical signals both include a first State Of Polarization (SOP) optical signal and a second SOP optical signal, and the first SOP optical signal is an optical signal when a horizontal-SOP optical signal is transmitted to the optical splitter, and the second SOP optical signal is an optical signal when a vertical-SOP optical signal is transmitted to the optical splitter; a horizontal optical signal obtaining apparatus, connected to the optical splitter and configured to separate the horizontal-SOP optical signal; and a vertical optical signal obtaining apparatus, connected to the optical splitter and configured to separate the vertical-SOP optical signal, which mitigates crosstalk of optical signals and improves performance of an optical transmission system for optical polarization division multiplexing.

Description

technical field [0001] The present invention relates to the technical field of optical depolarization multiplexing, in particular to a receiving device, a sending device, a system and a method for optical depolarization multiplexing. Background technique [0002] With the continuous enrichment and development of network applications, the main line bearer rate of the optical transmission network has increased from 10 gigabits per second (Gb / s), 40Gb / s to 100Gb / s. Moreover, the 100Gb / s optical transmission system will become the mainstream of the next generation optical network. [0003] At present, the optical transmission system with a line rate of 100Gb / s is mainly realized through a polarization multiplexing system. The polarization multiplexing system modulates two 56Gb / s data source signals at the sending end to two optical signals whose polarization states are orthogonal to each other, and then synthesizes the two optical signals into one polarization multiplexed signa...

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Problems solved by technology

[0009] In the process of realizing the present invention, the inventor found that the prior art has at least the following disadvantages: the optical signal output by the same output port of the polarization beam splitter is not fixed, It may be the optical signal X', or it may be the optical signal Y', and there is a component of the optical signal Y in the vertical direction in the separated optical signal X', that is, there is an optical signal Y component in the output optical signal X' , or, the separated optical signal Y' contains the component of the optical signal X, and there is obvious crosstalk, which affects the performance of the transmission system

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