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A graphene-based mid-infrared dual-wavelength co-repetitive pulsed fiber laser

A fiber laser and repeated frequency pulse technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of difficulty in realizing mid-infrared dual-wavelength laser pulses, loss of compactness and flexibility of fiber lasers, and inability to meet actual needs, etc. Achieve the effect of low loss, ingenious design, and close cooperation with each other

Active Publication Date: 2018-05-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the mid-infrared pulsed fiber laser of the existing technology is mainly focused on realizing single-wavelength pulses, which cannot meet actual needs, while traditional methods are difficult to achieve mid-infrared dual-wavelength laser pulses
In the prior art, the mid-infrared dual-wavelength pulse output is realized through active Q-switching and active Q-switching guided gain modulation. The structure is too complicated, which makes the fiber laser lose its inherent advantages of compactness, flexibility, and small size.

Method used

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  • A graphene-based mid-infrared dual-wavelength co-repetitive pulsed fiber laser
  • A graphene-based mid-infrared dual-wavelength co-repetitive pulsed fiber laser

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Embodiment 1

[0033] Such as figure 1 As shown, a graphene-based mid-infrared dual-wavelength pulsed fiber laser with the same repetition frequency includes a reflector 13 covered with a graphene film layer 12. From a top view angle: the reflector 13 is provided with a dichroic mirror at the same level One 10, the dichroic mirror one 10 is arranged at an inclination of 45° relative to the horizontal direction, a relatively parallel dichroic mirror two 14 is arranged directly above the dichroic mirror one 10, and a pulse output terminal 15 is arranged above the dichroic mirror two 14; Plano-convex mirror 4 11 is arranged between mirror 10 and reflector 1), plano-convex mirror 4 11 can focus the light beam to reflector 13; There are 2 μm light generation routes, 3 μm light generation routes and 2 μm light generation routes parallel. The dichroic mirror two 14 is positioned at the top of the dichroic mirror one 10, and the center point of the dichroic mirror two 14 and the center point of the...

Embodiment 2

[0039] Such as figure 1 with figure 2 As shown, the pump source 2 5 is turned on, and the 1150nm light emitted by the pump source 2 5 is focused to the coating layer 7 of the input end of the holmium-spectrum co-doped ZBLAN fiber 8 through the plano-convex mirror 1 6 to generate 3 μm light from the holmium-spectrum The output end of the co-doped ZBLAN fiber 8 is output, and the 3 μm light passes through the plano-convex mirror 3 9 and propagates to the dichroic mirror 1 10. Convex mirror four 11 is focused and transmitted to the mirror 13 covered with graphene film layer 12; 3 μm light is reflected by the mirror 13 and propagates back and forth in the second resonant cavity, and the number density of reversed particles of the upper energy level accumulates in large quantities; adjust the pump The power of Puyuan 2 5 makes the 3 μm optical power output from the holmium-spectrum co-doped ZBLAN fiber 8 low, so that the graphene cannot reach the saturation state, and the graphen...

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Abstract

The invention discloses a graphene-based mid-infrared dual-wavelength and same repetition frequency pulsed fiber laser, which belongs to the field of pulsed fiber lasers. A graphene-based mid-infrared dual-wavelength pulsed fiber laser with the same repetition frequency of the present invention comprises a reflector coated with a graphene film layer, the reflector is provided with a dichroic mirror 1 on the same level, and the dichroic Mirror one is arranged at an inclination of 45° relative to the horizontal direction, and a relatively parallel dichroic mirror two is arranged directly above said dichroic mirror two, and above said dichroic mirror two is a dual-wavelength pulse output terminal; said dichroic mirror one and A plano-convex mirror four is arranged between the mirrors, and the plano-convex mirror four can focus the light beam to the mirrors; the first dichroic mirror is in a 3 μm optical resonant cavity, and the second dichroic mirror is in a 2 μm optical resonant cavity , both of the two dichroic mirrors have a direction-guiding effect on both 2 μm and 3 μm light. The invention is cleverly designed and can obtain mid-infrared dual-wavelength high-power laser pulses with the same repetition frequency. Compared with traditional methods, it has the advantages of simple structure, small volume, low loss, simple operation and easy integration.

Description

technical field [0001] The invention relates to a pulse fiber laser, in particular to a graphene-based mid-infrared dual-wavelength pulse fiber laser with the same repetition frequency. Background technique [0002] Fiber lasers have the advantages of high conversion efficiency, small size, excellent output beam quality, low laser threshold, easy integration, and good heat dissipation. Dual-wavelength fiber lasers are defined according to the number of output laser wavelength channels. It is used as the initial light source in the research of differential interference ranging, optical sensing, microwave radio frequency signal and high repetition rate ultrashort pulse generation. 2-5μm mid-infrared pulsed laser has broad application prospects in national defense, military, medical treatment, communication, etc. , For example, water molecules have strong absorption peaks in the 2μm and 3μm bands, which can be used in a new generation of laser surgery to make blood coagulate qu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/11H01S3/067
Inventor 张晗刘聪韦晨谢朝杰李剑峰刘永
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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