Light polarization infinite tracking control method and system

Abstract

The invention belongs to the technical field of optical communication, and more particularly relates to a light polarization infinite tracking control method and system. The method comprises the steps that: S1, an optical transmitter transmits any polarized light; the polarization state of the polarized light is regulated through rotation of a polarization regulator; the optical power EX and EY of the polarized light in X and Y polarization states are extracted through an optical transmission link; EX and EY optical signals are received, and electrical error signals are extracted; a control module collects the electrical error signals and performs calculation to obtain a control voltage signal and outputs a driving voltage signal to the polarization regulator; and the polarization regulator changes the rotation angle or direction under the driving of the driving voltage and regulates the polarization state of the polarized light to enable the optical power of the polarized light in the X and Y polarization directions to be always kept balanced, wherein the driving voltage difference does not exceed 5% when the polarization regulator rotates by an angle of 0 and 2 pi. According to the scheme, infinite tracking control of light polarization can be realized, and meanwhile, the system cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and more specifically relates to an optical polarization infinite tracking control method and a system thereof. Background technique [0002] The growth of data center traffic has become a major part of today's global Internet Protocol (IP) traffic. It needs to use high-capacity optical interfaces for interconnection and network between data centers. Therefore, it is expected that there will be a capacity requirement of 800GE or even 1.6TBE in the future. Intensity Modulation and Direct Detection (IMDD) systems using Coarse Wavelength Division Multiplexing (CWDM) are still preferred for short distance applications in interconnection between data centers and networks due to its simplicity and low cost . However, limited by the use of wavelengths and bandwidth density, it is difficult to cope with the endless increase in data rate requirements of data centers. Traditional coherent ...

AI Technical Summary

Problems solved by technology

However, the cost and power consumption of the coherent detection scheme are too high, and the infinite tracking and stable control of the polarization state of light cannot be realized.

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