Integrated optical filter with center wavelength and filter bandwidth both adjustable independently

Abstract

The invention discloses an integrated optical filter with center wavelength and filter bandwidth both adjustable independently. The optical filter is composed of tunable micro-ring resonators as basic units and comprises an input optical waveguide, a first-level high-order optical filter, an intermediate optical waveguide, a second-level high-order optical filter and an output optical waveguide. The first-level high-order optical filter is used for primary filtering of light guided by the input waveguide; the second-level high-order optical filter is used for secondary filtering of light after the primary filtering. The construction method of the integrated optical filter is that multiple tunable micro-ring resonators are connected in series to form the high-order optical filters with flat-top filter curves; two levels of the high-order optical filters with center wavelength adjustable independently are cascaded to form the integrated optical filter with the center wavelength and filter bandwidth both adjustable independently.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to an integrated optical filter with independently adjustable central wavelength and filtering bandwidth. Background technique [0002] Wavelength-Division Multiplexing (WDM, Wavelength-Division Multiplexing) optical fiber communication system has become the basic platform of modern high-speed broadband communication network. As the core equipment of the optical fiber communication system, the use of Reconfigurable Optical Add-Drop Multiplexer (ROADM, Reconfigurable Optical Add-Drop Multiplexer) brings more convenience for business development and lower operation cost to network operation. ROADM adds, drops and multiplexes signals in units of wavelengths in the optical domain. Because of its transparency, flexibility and scalability, it is increasingly favored by network operators. [0003] An ideal reconfigurable optical network is capable of adding or dropping...

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide an integrated optical filter with independently adjustable central wavelength and filter bandwidth, which can be used to solve the problems of existing optical filters such as large volume, high cost, poor stability, and difficult adjustment and control.

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