Linear light modulation method and device based on polarization modulation

Abstract

The invention relates to a linear light modulation method and apparatus based on polarization modulation. The method comprises the following steps that: after an optical signal emitted by a laser source is used as input signal light to pass through a polarization modulation system, single modulation output signal light is generated, and the single modulation output signal light is divided into single reflection signal light and through output signal light; the single reflection signal light reversely reenters the polarization modulation system to generate reverse output signal light; and the through output signal light and the reverse output signal light complete optical field linear modulation of input signal light under the action of an integrated analyzer together. Compared with a high-order modulation optical transmitter which is widely used in a modern optical fiber communication system and is formed by an optical modulator, the linear light modulation method and apparatus based on polarization modulation, which are disclosed by the invention, have the advantages that due to adoption of linear modulation based on an optical field instead of a nonlinear modulation technology, optical loss can be effectively reduced, a resolution of a digital-to-analog converter can be effectively improved, and nonlinear damage can be effectively relieved, so that transmission performance of the optical fiber communication system is promoted.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, specifically relates to optical modulator technology, and more specifically relates to a linear optical modulation method and device based on polarization modulation. Background technique [0002] The optical fiber communication system is a communication system that uses light as the carrier, uses optical fiber as the transmission medium, and uses light to transmit information through photoelectric conversion. Optical fiber communication is one of the main technical pillars of informatization, and its communication network has spread all over the world, becoming the basis of the Internet and global information communication. However, with the rapid growth of various data services, especially in the era of big data represented by the next-generation Internet, the Internet of Things, and smart cities, the demand for various information service traffic prompts the optical fiber c...

AI Technical Summary

Problems solved by technology

[0003] Advanced modulation technology has high requirements on the optical modulator, which requires the optical modulator to have low optical loss, high digital-to-analog conversion resolution and weak nonlinear damage, etc., but most of the current optical modulators are intensity-based non-linear Linear modulation, it is difficult to meet the requirements of multi-dimensional high-order modulation technology

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