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

A technology of stimulated Brillouin and fiber lasers, which can be applied in the direction of laser scattering effect, lasers, laser parts, etc. compact effect

Active Publication Date: 2021-11-19
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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  • A 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; it includes: a narrow-linewidth laser seed source, a preamplifier, a wavelength division multiplexer, a beam combiner, and a pump laser module , double-clad gain fibers, pulsed lasers and optical isolators. In the present invention, the method for suppressing stimulated Brillouin scattering is: the pulsed laser light transmitted backwards is introduced into a high-power narrow-linewidth fiber laser through a wavelength division multiplexer, and the pulsed laser light transmitted backwards and the Stokes scattered light The cross-phase modulation effect is generated, which broadens the spectral width of the Stokes scattered light gain and reduces the peak gain, and has a certain inhibitory effect on the backward Stokes scattered light generated in the high-power narrow-linewidth fiber laser, thereby improving the narrow-linewidth fiber laser. Exciting Brillouin scattering threshold to increase output power scale of narrow linewidth fiber laser. The method has compact structure, simple structure and high reliability, and can be widely used in 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 Patents(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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