An integrated reconfigurable optical add-drop multiplexer

Abstract

The invention discloses an integrated reconfigurable optical add-drop multiplexer, comprising an input waveguide, an output waveguide, a shunt upload waveguide, a reconfigurable shunt signal upload unit, a total signal upload waveguide, a total signal upload unit, a main channel waveguide, a reconfigurable shunt signal download unit and a shunt download waveguide. The integrated reconfigurable optical add-drop multiplexer is good in integrity, low in insertion loss of channels and uniform in power of the channels, ensures the isolation degree between upload signals and download signals, improves the performance of the upload and download signals, and is simultaneously compact in structure.

Description

technical field [0001] The invention relates to a reconfigurable optical add-drop multiplexer applied in the fields of optical communication, optical network, etc., in particular to an integrated reconfigurable optical add-drop multiplexer based on silicon-on-insulator material. Background technique [0002] With the development of communication technology and the expansion of communication networks, optical communication networks have gradually become the main force for carrying and transmitting communication information. Optical Add-Drop Multiplexer (OADM) is the core component and equipment in optical communication network. As the optical network develops in the direction of intelligence, the optical add-drop multiplexer also evolves in the direction of intelligence and reconfigurability, which is the so-called reconfigurable optical add-drop multiplexer (ROADM). ROADM is located at the intermediate node of the multi-node optical fiber communication network. Its basic fu...

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Problems solved by technology

Since the ROADM is a multi-channel device, the number of intersection points that signals of different channels pass through is different, so the power difference of signals of different channels can reach 1.5-3.5dB, resulting in poor signal quality; adopt image 3 structure, since the signals in different directions are not isolated by the isolator, the filtered residual signal will become a crosstalk source, causing the crosstalk of the uploaded residual signal to the download signal, and the crosstalk of the input residual signal to the output signal; due to the upload and The download signal uses the same resonator. In principle, a single-ring resonator can only guarantee better performance in one direction (upload direction or download direction), and poor performance in the other direction. Double-ring or multi-ring structures can solve the problem. This problem, but its preparation difficulty will increase a lot

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