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Wavelength-tunable narrow linewidth laser based on graphene Bragg grating

A Bragg grating and graphene technology, applied in the field of lasers, can solve the problems of low wavelength adjustment accuracy and long response time, and achieve the effects of improving adjustment accuracy and response time, reducing interference, and reducing line width

Inactive Publication Date: 2017-05-10
CHONGQING UNIV
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Problems solved by technology

[0003] The invention provides a wavelength-tunable narrow-linewidth laser based on graphene Bragg gratings to solve the problems of low wavelength adjustment accuracy and long response time of current wavelength-tunable lasers

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  • Wavelength-tunable narrow linewidth laser based on graphene Bragg grating
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  • Wavelength-tunable narrow linewidth laser based on graphene Bragg grating

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Embodiment Construction

[0022] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings For further detailed explanation.

[0023] In the description of the present invention, unless otherwise specified and limited, it should be noted that the term "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be Directly connected or indirectly connected through an intermediary, those skilled in the art can understand the specific meanings of the above terms according to specific situations.

[0024] see figure 1 , is a ...

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Abstract

The invention provides a wavelength-tunable narrow linewidth laser based on a graphene Bragg grating. The wavelength-tunable narrow linewidth laser comprises the graphene Bragg grating, wherein the graphene Bragg grating comprises a fiber core, cladding and a graphene layer which covers the cladding in sequence from inside to outside. The thickness of the cladding is regulated to cover the cladding with the graphene layer, the light intensity of pump light transmitted to the fiber core is regulated to regulate the modulation refractive index of the graphene Bragg grating, the regulation of the central wavelength of the graphene Bragg grating is realized, so that the weave length of a laser signal returned and output by the graphene Bragg grating can be regulated, and the laser signal subjected to wavelength regulation can be subjected to further linewidth cyclic compression on the basis of a Rayleigh optical fiber. Through the laser, the central wavelength of the graphene Bragg grating can be regulated, the accuracy and the response time of the regulation of the central wavelength of the graphene Bragg grating are improved, and in addition, a laser signal with ultra-narrow linewidth can be obtained on the basis of the Rayleigh optical fiber.

Description

technical field [0001] The invention belongs to the field of lasers, in particular to a wavelength-tunable narrow-linewidth laser based on graphene Bragg gratings. Background technique [0002] Lasers are widely used in optical fiber communication, precise optical coherence measurement, optical fiber distributed sensing and other fields. The narrow reflection bandwidth of graphene Bragg grating can easily select a single longitudinal mode from the multi-longitudinal mode laser satisfying the laser oscillation, and the back Rayleigh scattering effect in the fiber can further effectively narrow the line of the single longitudinal mode laser. width. However, in the current field of narrow linewidth lasers, the use of graphene Bragg gratings for wavelength regulation mainly changes the effective refractive index of the grating by changing the stress and temperature of the graphene Bragg grating, and further changes the central wavelength of the graphene Bragg grating. However,...

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Application Information

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IPC IPC(8): H01S3/067H01S3/10
CPCH01S3/0675H01S3/06783H01S3/1003
Inventor 朱涛高磊李雨佳
Owner CHONGQING UNIV
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