Optical isolator, optical add/drop multiplexer and optical combiner

Abstract

The invention discloses an optical isolator, an optical add / drop multiplexer and an optical combiner, wherein the optical isolator comprises an input wave guide, a waveguide grating containing magneto-optic material and an output wave guide which are connected sequentially in series; the optical add / drop multiplexer comprises the optical isolator, a main input end, a first circulator, a second circulator, a main output end, a downloading end and an uploading end, wherein the main input end, the first circulator, the optical isolator, the second circulator and the main output end are connectedsequentially in series, the downloading end is connected with the first circulator, and the uploading end is connected with the second circulator; and the optical combiner comprises the optical isolator, a first input end, a second input end, an optical circulator containing the magneto-optic material and an output end, wherein the first input end, the optical isolator and the output end are connected in series, and the second input end is connected with the optical circulator containing the magneto-optic material. The optical isolator, the optical add / drop multiplexer and the optical combiner have small volumes and good mechanical stability.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an optical isolator, an optical add / drop multiplexer and an optical beam combiner. Background technique [0002] With the rapid development of optical communication technology and the industrial needs of all-optical communication networks, miniaturization, functionalization, componentization and integration are the inevitable trends in the development of optical devices. Optical isolators and circulators provide various possibilities for reverse isolation, bidirectional transmission, and flexible switching of multiple channels. For example, the system capacity upgrade based on wavelength division multiplexing technology puts forward new requirements for traditional single-wavelength devices, requiring optical components Not only can the isolation function be realized, but also multiple wavelengths, especially light waves with equal frequency intervals, can be proces...

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However, this scheme requires high production technology

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