A MEMS-based ultra-broadband tunable optical filter

Abstract

The invention belongs to the technical field of optical communication and particularly discloses an MEMS-based ultra-wide band adjustable optical filter which comprises a 1*N port optical switch group, an optical fiber array, an array optical waveguide, a collimating lens, a diffraction grating, a light beam compression unit and an MEMS micromirror, the optical switch group is connected with the optical fiber array, one side of the array optical waveguide is in butt coupling with the optical fiber array, the other side of the array optical waveguide is arranged on a front focal plane of the collimating lens, the diffraction grating is arranged on a rear focal plane of the collimating lens, and the diffraction grating and the MEMS micromirror are arranged on a front focal plane and a rear focal plane of the light beam compression unit respectively. Through the combination of the 1*N port optical switch group and the array optical waveguide, a working waveband is divided into N sub-wavebands, and the expansion of a tuning range is realized. According to the invention, the problem of narrow tuning range caused by the limitation of an MEMS manufacturing process in the prior art can besolved, and specifically, the tuning range of the filter can be expanded to N times through a band segmentation technology.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and more specifically relates to a MEMS-based ultra-wide band tunable optical filter. Background technique [0002] Dense Wavelength Division Multiplexing (DWDM) technology is currently a mainstream technology in the field of optical fiber communication. In the DWDM optical network, the tunable optical filter (Time of Flight, TOF), as one of the important dynamic optical devices, is used to realize functions such as channel selection, optical performance monitoring, and optical channel monitoring in the wavelength domain. Optical network requirements for TOF include low loss, narrow bandwidth, sufficient tuning range and good filtering characteristics. At the same time, it is necessary to reduce the size of the device as much as possible and reduce the manufacturing cost. [0003] The mainstream technical scheme of TOF currently used in optical fiber communication systems is based ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of the prior art, the object of the present invention is to provide a MEMS-based ultra-wideband tunable optical filter, aiming to solve the problem of narrow tuning range in the prior art due to the limitations of the MEMS manufacturing process

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