Mach-Zehnder interferometer with low random phase error

Abstract

The invention discloses a Mach-Zehnder interferometer with a low random phase error. The Mach-Zehnder interferometer comprises an input waveguide region, an N*2 input optical coupler, a first filter mode region, a phase shift region, a second filter mode region, a 2*M output optical coupler and an output waveguide region, wherein the input waveguide region comprises N input waveguides, the first mode filtering region comprises a first mode filter and a second mode filter, the second mode filtering region comprises a third mode filter and a fourth mode filter, and the output waveguide region comprises M output waveguides; the N input waveguides are connected with the input ends of the first mode filter and the second mode filter respectively after passing through the N*2 input optical coupler, the output ends of the first mode filter and the second mode filter are connected with the input ends of the third mode filter and the fourth mode filter respectively through the phase shift areas, and the output ends of the third mode filter and the fourth mode filter are connected with the M output waveguides respectively after passing through the 2*M output optical coupler. According to theinvention, the Mach-Zehnder interference structure with low random phase error is realized.

Description

technical field [0001] The invention relates to a planar optical waveguide integrated device, in particular to a Mach-Zehnder interferometer with low random phase error. Background technique [0002] Optical communication has achieved great success in the field of long-distance communication. With the increasing development of optical communication technology, the demand for communication capacity has increased sharply. At the same time, the next generation of optical networks has put forward higher requirements for intelligence and flexibility, so that flexible and intelligent optical signal switching and routing. Specifically, on each optical network node, optical modules such as an optical cross-connector, an optical add / add adder, and the like are the key foundations for realizing intelligence. In an intelligent optical module, an optical switch array with dozens or even hundreds of optical switch units is often included. Therefore, as the basic device unit for optica...

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Problems solved by technology

[0005] In order to solve the problems existing in the background technology, the object of the present invention is to provide a Mach-Zehnder interferometer with low random phase error, which solves the serious random phase error problem existing in the traditional Mach-Zehnder interferometer, and is helpful for realizing high performance. Key components such as optical switches and large-scale arrays are of great value

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