Optical filter structure and optical filter

A technology of optical filters and waveguides, applied in optics, optical components, instruments, etc., can solve the problems of large size, inability to meet high stability, high integration, easy control, poor stability, etc.

Active Publication Date: 2021-06-25
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Abstract
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AI Technical Summary

Problems solved by technology

Bandwidth tunable optical filters in the related art often adopt structures such as multi-stage Mach-Zehnder (MZ, MachZehnder) and high-order microring resonators. and control algorithm complex, poor stability and other issues
[0004] In the process of realizing the present disclosure, it is found that the existing tunable optical filters are poor in practicability and cannot meet the requirements of high stability, high integration, and easy control at the same time

Method used

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  • Optical filter structure and optical filter
  • Optical filter structure and optical filter
  • Optical filter structure and optical filter

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Embodiment Construction

[0022] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. It should be understood, however, that these descriptions are exemplary only, and are not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present disclosure.

[0023] The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the present disclosure. The terms "comprising", "comprising", etc. used herein indicate the presence of stated features, ...

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Abstract

The present disclosure provides an optical filter structure, comprising: an optical switch comprising a first output end and a second output end, the optical switch being used for receiving an optical signal and switching a transmission path of the optical signal; a second-order micro-ring optical filter unit which is connected with the first output end of the optical switch and is used for filtering the optical signal; a first waveguide which is connected with the output end of the second-order micro-ring optical filter unit and is used for transmitting the filtered optical signal; and a second waveguide which is connected with the second output end of the optical switch and is used for transmitting the unfiltered optical signal. In addition, the invention also provides an optical filter formed by using the optical filter structure through multi-stage cascading.

Description

technical field [0001] The present disclosure relates to the technical field of optical fiber communication, and more particularly, to an optical filter structure and an optical filter formed by multi-stage cascading using the above optical filter structure. Background technique [0002] Optical filters can directly filter microwave signals with high frequency bandwidth, and are essential devices in transmitters, receivers and switching nodes of Wavelength Division Multiplexing (WDM) networks. Applications such as lidar and astronomical systems also play an irreplaceable role. [0003] The ability to select the target frequency band is an important indicator of optical filters used in microwave photonic signal processing, which requires optical filters to have tunable bandwidth characteristics, and under certain conditions have low insertion loss, flat top and Box filter line response with steep edges. Bandwidth tunable optical filters in the related art often adopt struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/293
CPCG02B6/29395G02B6/29343G02B6/2934
Inventor 牛佳琪付鑫张磊杨林
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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