On-chip variable optical attenuator based on mach zehnder interferometer

A technology of dimming attenuation and interferometer, which is applied in the field of optical communication, can solve problems such as difficulty in meeting the optical power adjustment needs of integrated optical communication chips, and achieves the effects of satisfying optical power attenuation and precise regulation, flexible implementation, and reduced size.

Inactive Publication Date: 2019-05-28
北京爱杰光电科技有限公司
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AI Technical Summary

Problems solved by technology

[0002] The existing technology is generally a discrete device based on optical fiber technology, which is suitable for an optical fiber communication system built by multiple discrete optical communication devices or equipment, and it is difficult to meet the needs of optical power adjustment on an integrated optical communication chip

Method used

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  • On-chip variable optical attenuator based on mach zehnder interferometer
  • On-chip variable optical attenuator based on mach zehnder interferometer
  • On-chip variable optical attenuator based on mach zehnder interferometer

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Embodiment Construction

[0028] Such as figure 1 As shown, an on-chip adjustable optical attenuator based on a Mach-Zehnder interferometer includes a Mach-Zehnder interferometer structure 1 and an optical path adjustment unit 2; the Mach-Zehnder interferometer structure 1 includes an input waveguide 11 and an output waveguide 12 , a beam splitter 13, a beam combiner 14, a first transmission waveguide 15 and a second transmission waveguide 16; the fixed arm length difference 17 is the geometric length difference between the first transmission waveguide 15 and the second transmission waveguide 16, and the fixed arm The arm length difference 17 is equal to 0 or not equal to 0; the optical path adjustment unit 2 is arranged on the second transmission waveguide 16 for dynamically adjusting the time when the light reaches the beam combiner 14 after passing through the second transmission waveguide 16 and the first transmission waveguide 15 Phase difference, so as to realize the drift of the output spectrum ...

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Abstract

The invention discloses an on-chip variable optical attenuator based on a mach zehnder interferometer. The on-chip variable optical attenuator comprises a mach zehnder interferometer structure and a light path adjusting unit. The mach zehnder interferometer structure comprises an input waveguide, an output waveguide, a beam splitter, a beam combiner, a first transmission waveguide and a second transmission waveguide. The mach zehnder interferometer structure has an initial fixed arm length difference, wherein the fixed arm length difference is the geometric length difference between the firsttransmission waveguide and the second transmission waveguide. The light path adjusting unit is arranged on the second transmission waveguide and used for dynamically adjusting the phase difference oflight passing through the second transmission waveguide and the first transmission waveguide to reach the beam combiner, and therefore drifting of an output spectrum and attenuation of the light powerof the specific wavelength are achieved. The variable optical attenuator has the advantages of being integrated on a chip, being small, being continuously adjusted dynamically and the like, and the requirements of on-chip light power attenuation and precise regulation and control of the integrated chip can be simultaneously met.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to an on-chip adjustable optical attenuator based on a Mach-Zehnder interferometer. Background technique [0002] The existing technology is generally a discrete device based on optical fiber technology, which is suitable for an optical fiber communication system built by multiple discrete optical communication devices or equipment, and it is difficult to meet the needs of optical power adjustment on an integrated optical communication chip. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the object of the present invention is to provide an on-chip integrated, miniaturized, and dynamically continuously adjustable optical attenuation device based on Mach-Zehnder interferometer to meet the needs of on-chip optical power attenuation and precise regulation. [0004] In order to solve the problems of the technologie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/26
Inventor 周治平谈卫
Owner 北京爱杰光电科技有限公司
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