Acousto-optic Q-switched ytterbium-doped all-fiber laser

An acousto-optic modulator, all-fiber technology, applied in lasers, phonon exciters, laser parts, etc., can solve the problems of low coupling efficiency, complex experimental setup, and high misalignment sensitivity, achieve short rise and fall times, and improve coupling. The effect of high efficiency and diffraction efficiency

Inactive Publication Date: 2009-10-14
TIANJIN UNIV
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Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to solve the problems of low coupling efficiency, high misalignment sensitivity, and complicated experimental equipment caused by the discrete component structure in the Q-switched fiber laser, and provide a fully optical fiber laser. Acousto-optic Q-switched Ytterbium-doped all-fiber laser

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  • Acousto-optic Q-switched ytterbium-doped all-fiber laser

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Embodiment Construction

[0019] The structure of an acousto-optic Q-switched ytterbium-doped all-fiber laser is as follows figure 1 shown. It consists of: FBG fiber grating 1, acousto-optic modulator with pigtail AOM acousto-optic Q switch 2, multimode coupler 6, two laser diode LD pump sources 4, D-type double-clad ytterbium-doped fiber 7 and The laser output pigtail 8. Two LD semiconductor lasers 4 couple the pump light into the Yb-doped gain fiber 7 through the multimode coupler 6 to realize the pumping of the gain fiber 7 . FBG1 is connected to the signal terminal 3 of the multimode coupler through the AOM acousto-optic Q switch 2, and the end face of the FBG fiber grating 1 and the output pigtail 8 forms a resonant cavity. When an alternating voltage is applied to the acousto-optic modulator, The acousto-optic modulator periodically adjusts the loss in the resonant cavity to realize the pulse output of the all-fiber laser.

[0020] Q means the loss in the laser, and the acousto-optic Q switch ...

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Abstract

The invention belongs to the field of laser devices, and particularly relates to an acousto-optic Q-switched ytterbium-doped all-fiber laser. In order to solve the problems of low coupling efficiency, high maladjustment sensitivity, complex experimental facilities and the like caused by separated component structure in Q-switched fiber laser, the invention adopts a technical proposal of the acousto-optic Q-switched ytterbium-doped all-fiber laser which comprises a fiber bragg grating (FBG), an acousto-optic modulator (AOM) with tail fiber, a multimode coupler, two pumping light-emitting diodes (LDs), ytterbium-doped double-clad fiber and output tail fiber, wherein the two pumping LDs couple pumping light to the ytterbium-doped double-clad fiber respectively by the multimode coupler; the ytterbium-doped double-clad fiber is connected between the output terminal of the multimode coupler and the output tail fiber; the FGB is connected to a signal terminal of the multimode coupler by the AOM with tail fiber, and forms a resonant cavity with the end surface of the output tail fiber simultaneously; and alternating voltage is applied on the AOM. The invention is mainly used in the manufacturing and designing of lasers.

Description

technical field [0001] The invention relates to the field of laser devices, in particular to an acousto-optic Q-switched ytterbium-doped all-fiber laser. Background technique [0002] Fiber lasers have the advantages of high efficiency, compact structure, and easy portability. They have broad application prospects in the fields of military, industry, biomedicine, nonlinear frequency conversion, remote sensing, and space communications. Its research has become very active in the field of laser devices. direction. Judging from the current situation, in the research of Q-switched fiber lasers, Q-switches are roughly divided into two types: non-fiber Q-switches and fiber-optic Q-switches. The non-fiber type mainly includes acousto-optic Q-switches, electro-optic Q-switches, passive saturable absorber Q-switches and rotating mirror Q-switches, etc. The non-fiber type Q-switches are bulk Q-switches. When used for Q-switching fiber lasers, the resonator and Most of the other opti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/0941H01S3/16H01S3/08H01S3/117H01S3/136G02F1/35
Inventor 宁继平尚连聚白晓磊韩群范国芳
Owner TIANJIN UNIV
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