High-order dynamic adjustable dispersion compensation equipment and dispersion compensation method thereof

Abstract

The invention relates to high-order dynamic adjustable dispersion compensation equipment and a dispersion compensation method thereof. In the prior art, the chirp rate of fiber grating can only be linearly changed. In the equipment, the fiber grating and a II port of a fiber circulator are in light connection; a III port of the fiber circulator and a single-port of a fiber coupler are connected; one port of a dual-port of the fiber coupler is in light connection with the input end of a dispersion detector; the input end of the dispersion detector is in signal connection with the input end of a controller; the output end of the controller is in signal connection with the input end of a controllable power supply; and the output end of the controllable power supply is in electrical connection with a semiconductor refrigeration element. The method comprises the following steps: the dispersion compensation equipment is accessed to two ends of the fiber communication network; the controllerperforms analysis feedback according to the measurement parameters of the dispersion detector, and changes the injection current of each semiconductor refrigeration element so as to change the temperature field distribution in a V-shaped groove and realizing the aim of dispersion compensation. The equipment has small module dimension, and can achieve high-order and dynamic adjustment of dispersion.

Description

technical field [0001] The invention belongs to the field of optical fiber communication, and is especially applicable to the field requiring miniaturized, high-order dynamic adjustable dispersion compensation, and relates to a new type of dispersion compensation device that uses multiple semiconductor cooling elements to change the chirp rate of fiber gratings to adjust dispersion , and a method for realizing dispersion compensation using the device. Background technique [0002] In the field of optical fiber communication, with the continuous improvement of communication rate and communication distance and the development of dense wavelength division multiplexing technology, dispersion has become an important factor restricting the improvement of optical fiber communication performance. At present, the dispersion compensation technology can be divided into static compensation and dynamic compensation. After the optical signal propagates for a very long distance in the opt...

AI Technical Summary

Problems solved by technology

However, the traditional adjustment technology using stress or changing the temperature gradient can only linearly change the chirp rate of the fiber grating, and cannot compensate for high-order dispersion, which limits practical applications.

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