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Device for suppressing stimulated Brillouin scattering in high-power narrow-linewidth fiber laser

A technology of stimulated Brillouin and fiber lasers, applied in the direction of laser light scattering effect, lasers, laser components, etc., can solve the problems of large signal optical power loss, complex structure, etc., achieve flexible suppression ratio, simple and reliable operation sex high effect

Active Publication Date: 2020-08-14
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, the above-mentioned patents have problems such as relatively complex structure and large loss of signal optical power.

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  • Device for suppressing stimulated Brillouin scattering in high-power narrow-linewidth fiber laser

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with specific embodiments.

[0031] Such as figure 1 shown. The invention discloses a device for suppressing stimulated Brillouin scattering in a high-power narrow-linewidth fiber laser, comprising: a narrow-linewidth laser seed source 1, a preamplifier 2, a first wavelength division multiplexer 3, and a pump laser module 4. Beam combiner 5, double-clad gain fiber 6, second wavelength division multiplexer 7, pulsed laser 8, optical isolator 9;

[0032] Wherein, the output end of narrow-linewidth laser seed source 1 is connected with the input end of preamplifier 2; The signal end of the first wavelength division multiplexer 3 is connected with preamplifier 2 output ends, and the common end is connected with the signal end of the beam combiner 5; the pigtail of the pump laser module 4 is connected with the pumping end of the beam combiner 5, and one end of the double-clad gain fiber 6 is con...

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Abstract

The invention discloses a device for suppressing stimulated Brillouin scattering in a high-power narrow-linewidth fiber laser. The device comprises a narrow linewidth laser seed source, a pre-amplifier, a wavelength division multiplexer, a beam combiner, a pump laser module, a double-cladding gain optical fiber, a pulse laser and an optical isolator. A method for inhibiting stimulated Brillouin scattering in the invention comprises that the wavelength division multiplexer introduces backward transmitted pulse laser into the high-power narrow-linewidth fiber laser, the backward transmitted pulse laser and backward Stokes scattered light are utilized to generate a cross phase modulation effect, so that the Stokes scattering light gain spectrum is broadened and the peak gain is reduced, the backward Stokes scattering light generated in the high-power narrow-linewidth fiber laser is inhibited to certain extent, the stimulated Brillouin scattering threshold of the narrow-linewidth fiber laser is improved, and the output power scale of the narrow-linewidth fiber laser is improved. According to the method, the structure is compact, the reliability is high, and the method can be widely applied to the field of high-power lasers.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to a device for suppressing stimulated Brillouin scattering in high-power narrow-linewidth fiber lasers. Background technique [0002] High-power narrow-linewidth fiber lasers have a wide range of applications in the fields of gravitational wave detection, lidar, fiber optic sensing, nonlinear frequency conversion, beam combining, coherent communication, and laser weapons. [0003] For high-power narrow-linewidth fiber lasers, due to the relatively long fiber length and small cross-sectional area of ​​the fiber core, when the transmission power reaches a certain level, it is easy to produce various nonlinear effects, which limits the further improvement of its output performance. [0004] Among these nonlinear effects, the threshold of stimulated Brillouin scattering is the lowest, which is the primary factor limiting the scale-up of the output power of narrow-linewidth fiber l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/094H01S3/10H01S3/108H01S3/30
CPCH01S3/067H01S3/094H01S3/094042H01S3/10053H01S3/1086H01S3/302
Inventor 杨昌盛岑旭徐善辉关先朝赵齐来冯洲明杨中民
Owner SOUTH CHINA UNIV OF TECH
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