All-optical fast scrambler based on polarization beam splitting structure

Abstract

The invention provides an all-optical fast scrambler based on a polarization beam splitting structure, which comprises a first polarization beam splitting device, a first polarization beam combining device and a circulating light path, and is characterized in that the first polarization beam splitting device divides an input optical signal into two polarization beam splitting beams, the first polarization beam splitting beam is transmitted to the first polarization beam combining device, and the second polarization beam splitting device is transmitted to the circulating light path; the second path of polarization split light beam is transmitted to a circulation light path, the circulation light path carries out circulation decoherence on the second path of polarization split light beam, and every time decoherence is carried out, the circulation light path provides one part of the decoherence to the first polarization beam combining device, and the other part of the decoherence enters the next time of decoherence in a circulation mode; the phase differences of the first polarization beam splitting beam at the first polarization beam combining device and the third polarization beam splitting beams after different times of decoherence are different and change continuously and rapidly, so that the first polarization beam combining device outputs polarized light with different polarization states and the polarization states change continuously and rapidly, and rapid scrambling is achieved.

Description

technical field [0001] The invention belongs to the field of polarizers, in particular to an all-optical fast polarizer based on a polarization beam splitting structure. Background technique [0002] The polarization-dependent damage of light is a common phenomenon in optical fiber signal transmission. Reducing polarization-dependent damage is a very important aspect in the field of optical fiber communication. The polarizer is a means to convert input polarized light into unpolarized light output. In fiber optic communications, polarization scramblers are often used to solve problems such as polarization dependent loss (PDL), polarization mode dispersion (PMD), and polarization dependent gain (PDG). However, low-speed scramblers can no longer meet the needs of large-capacity, high-speed signal transmission in the future. [0003] At present, there are two main types of mainstream fast polarizers or polarizer structures. One is the polarizer based on electronically controll...

AI Technical Summary

Problems solved by technology

[0005] The invention provides an all-optical fast polarization scrambler based on a polarization beam splitting structure to improve the problem of polarization-related damage in communication systems and to meet the current demand for fast polarization scrambling

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