Optical waveguide ring resonator based on asymmetric directional coupler

Abstract

The invention discloses an optical waveguide ring resonator based on an asymmetric directional coupler, and is applied to the fields of optical communication, optical information processing and optical sensing to realize wave filtering, delay, sensing and other functions. The optical waveguide ring resonator comprises a main waveguide, a multimode waveguide and a ring waveguide, the main waveguideand the multimode waveguide form an asymmetric directional coupler, and a plurality of ring waveguide resonant cavities can be coupled to the main waveguide at the same time by using the asymmetric directional coupler so that the FSR can be increased by utilizing the vernier effect, the high-performance ring resonator is realized, the structure of the ring resonator is easy to expand, the numberof the utilized ring resonant cavities can be expanded from two to three or even more by designing different asymmetric couplers, and the size of the device cannot be obviously increased. The ring resonator is compact in structure, high performance can be achieved with a small size, application of the ring resonator in the fields of optical communication, optical information processing, optical sensing and the like is further promoted, important technical support is provided for the fields and the ring resonator has high application value.

Description

technical field [0001] The invention relates to the technical fields of optical waveguide devices, optical communication, optical information processing and optical sensing, in particular to an optical waveguide ring resonator based on an asymmetric directional coupler. Background technique [0002] Since the birth of laser technology and low-loss optical fiber technology, optical communication technology, optical information processing technology and optical sensing technology using laser as information carrier have achieved rapid development and achieved remarkable achievements, which have promoted the rapid development of human society. to the information age. Today, the acquisition, transmission and processing of information have played a vital role in various fields related to national security and national livelihood, such as national defense, communication, transportation, education, medical care, and environmental protection, and determine the development of these fi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an optical waveguide ring resonator based on an asymmetric directional coupler, aiming at the problem that the series structure of the traditional cascaded ring resonator causes a large volume and is not conducive to further integration, the proposed resonance Two or more waveguide rings in the filter structure are coupled to the main waveguide simultaneously through an asymmetric directional coupler, so that it uses the vernier effect to increase the free spectral range (FSR) while maintaining the compactness of the structure

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