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Graphene-based Q-switched pulse fiber narrow line-width laser

A graphene and narrow linewidth technology, applied in optical engineering, material engineering, and optical fiber technology, can solve the problems of unfavorable integration, long-distance transmission, and shortage of Q-switched lasers, and achieve simple structure, narrow output linewidth, and wide application prospects Effect

Inactive Publication Date: 2016-06-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] In view of the above problems or deficiencies, the present invention provides a graphene-based Q-switched pulsed fiber narrow linewidth laser, which solves the problems that traditional Q-switched lasers are not conducive to integration and insufficient long-distance transmission

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  • Graphene-based Q-switched pulse fiber narrow line-width laser

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0021] combine figure 1 , figure 2 As shown, a 2 cm DFB is fabricated on an erbium-doped fiber, and one end is connected to a wavelength division multiplexing coupler. The optical fiber cladding in the DFB area is etched away with hydrofluoric acid, and graphene is wrapped in the corroded DFB area. The thickness of the graphene is 0.38 nm, and the wrapping length is 2 cm.

[0022] The diameter of the erbium-doped fiber is 125 microns, the diameter of the fiber in the DFB area is 8 microns, the graphene film is a single-layer graphene of 0.38 nm, and the wrapped area of ​​the graphene film is the DFB area with a length of 2 cm.

[0023] image 3 is a schematic diagram of the time-domain experimental results of the present invention, indicating the distribution trend of optical power on the time axis. The 980nm continuous pump laser is injected in...

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Abstract

The invention relates to the technical fields of optical fiber technology, optical engineering and material engineering, in particular to a graphene-based Q-switched pulse fiber narrow line-width laser. A distributed feedback bragg grating DFB is fabricated on an erbium-doped fiber; the fabricated DFB region completely coats a graphene film; with graphene as a Q-switched material, namely a saturable absorber, of a DFB narrow line-width cavity, rapid adjustment of the loss of the graphene on a DFB composite cavity when the power rate of a pump light is greater than 5MHz is achieved; and high-frequency pulse laser output is generated. The all-fiber pulse narrow line-width laser for carrying out Q-switching on a fiber laser resonant cavity is achieved, has the advantages of being low in cost, simple in structure, good in stability, high in modulation rate, small in output line-width, easy to integrate and the like, and has a wide application prospect in the fields of optical fiber communication and optical fiber sensing.

Description

technical field [0001] The invention relates to the technical fields of optical fiber technology, optical engineering and material engineering, in particular to optical fiber communication, optical fiber sensing and optical fiber laser technology. Background technique [0002] As a very important optical device, fiber laser is widely used in industrial processing, medical treatment, communication, sensing and other fields due to its small size, low cost and many advantages of easy integration. Especially pulsed narrow linewidth fiber laser, due to its narrow linewidth, high signal-to-noise ratio, high efficiency, and remote control, makes its application in optical fiber communication, optical fiber sensing and other fields very important. [0003] In the field of sensing and communication, commonly used Q-switching methods include rotating mirror Q-switching, electro-optic Q-switching, acousto-optic Q-switching, and saturated absorption Q-switching. In the first three meth...

Claims

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Application Information

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IPC IPC(8): H01S3/11H01S3/067
CPCH01S3/1118H01S3/0675
Inventor 庾财斌吴宇姚佰承饶云江
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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