All-fiber annular tunable fiber laser

A fiber laser and all-fiber technology, applied in the laser field, can solve the problems of inconvenient adjustment of grating efficiency, narrow adjustment range, and low output power, and achieve the effects of compact structure, good beam quality, and no insertion loss

Inactive Publication Date: 2013-08-21
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in fiber lasers, the common tunable laser technology is mainly based on rotating grating, compound ring resonance, adjusting the angle of intracavity etalon, using acousto-optic filter, electrically adjustable liquid crystal etalon, fiber grating tuning, fiber ring, sampling grating These technologies, such as polarization control, either use a non-full fiber structure, or the grating used is inconvenient to adjust and has low efficiency, or the adjustment range is relatively narrow, or the output power is too small

Method used

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  • All-fiber annular tunable fiber laser

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Embodiment

[0042] Such as figure 1 As shown, following the above technical solution of the present invention, the all-fiber ring tunable fiber laser of this embodiment includes two parts: the main part of the fiber laser and the tunable filter.

[0043] The main part of the fiber laser consists of a pump source 1, a first wavelength division multiplexer 2, a double-clad doped fiber 3, a second wavelength division multiplexer 4, a double-clad non-doped fiber 6, and an output pigtail 11. The first thing to be determined here is the double-clad doped fiber 3, and then other components will be determined successively according to the doped fiber.

[0044] Double-clad doped fiber 3: In this example, a 6 / 125μm thulium-doped double-clad fiber is selected, and the cladding absorption rate is 1.4dB / m790nm, that is, the cladding absorption rate at 790nm is 1.4dB / m. The numerical aperture is 0.23, and the fiber length is 10 m. Since the thulium-doped fiber has a wider gain spectrum, it can achiev...

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Abstract

The invention discloses an all-fiber annular tunable fiber laser. The all-fiber annular tunable fiber laser comprises a first wavelength division multiplexer, a doubly-clad doped fiber, a second wavelength division multiplexer and a tunable filter. A pumping arm, a signal injection end and a beam combination end of the first wavelength division multiplexer are connected with a pumping source, a doubly-clad non-doped fiber and the doubly-clad doped fiber in a welding mode respectively, and a signal injection end, a first beam split arm and a second beam split arm of the second wavelength division multiplexer are connected with the doubly-clad doped fiber, the doubly-clad non-doped fiber and an output tail fiber. The tunable filter comprises a fiber fixing drawing support, a triangular prism support, a piezoelectric ceramic, a cushion block and a radio-frequency power supply, wherein the fiber fixing drawing support comprises a left section and a right section, the doubly-clad non-doped fiber is wound in grooves on the outside of the fiber fixing drawing support and is tensioned, and the piezoelectric ceramic is connected with the radio-frequency power supply. The all-fiber annular tunable fiber laser is free of insertion loss, good in beam quality, high in output power, compact in structure, stable in performance, and capable of achieving continuous tuning in a wide range.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a fiber laser, in particular to an all-fiber ring tunable fiber laser. Background technique [0002] Fiber lasers are developing rapidly due to their small size, high efficiency, good stability, and good beam quality. At present, in fiber lasers, the common tunable laser technology is mainly based on rotating grating, compound ring resonance, adjusting the angle of intracavity etalon, using acousto-optic filter, electrically adjustable liquid crystal etalon, fiber grating tuning, fiber ring, sampling grating These technologies, such as polarization control, either use a non-full fiber structure, or the grating used is inconvenient to adjust and has low efficiency, or the adjustment range is relatively narrow, or the output power is too small. Contents of the invention [0003] Aiming at the problems existing in the existing tuned fiber lasers, the present invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067
Inventor 冯选旗冯晓强齐新元张尧白晋涛贺庆丽
Owner NORTHWEST UNIV(CN)
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