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Device for increasing stimulated Brillouin scattering threshold value in high-power single-frequency optical fiber laser device

A fiber laser, stimulated Brillouin technology, applied in the field of laser applications, can solve the problems of low integration, complex structure, difficult control, etc., and achieve the effects of easy integration, high beam quality, and improved beam quality

Active Publication Date: 2016-02-10
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0010] The purpose of the present invention is to provide a device for improving the stimulated Brillouin scattering threshold in a high-power single-frequency fiber laser, and the technical problem to be solved is to overcome the complex structure, difficult control, and low integration of the existing device. shortcoming

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  • Device for increasing stimulated Brillouin scattering threshold value in high-power single-frequency optical fiber laser device
  • Device for increasing stimulated Brillouin scattering threshold value in high-power single-frequency optical fiber laser device

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing and embodiment, it should be noted that the scope of protection of the present invention is not limited to the scope expressed in embodiment, it should be pointed out that if there is no special detailed description below, all Those skilled in the art can refer to the prior art to realize.

[0029] like figure 1 As shown, the thread grooves 4 in the embodiment of the present invention can have different shapes, and the shapes are rectangles of different sizes arranged alternately.

[0030] like figure 2As shown, the device for improving the stimulated Brillouin scattering threshold in a high-power single-frequency fiber laser includes a metal cylinder 1, a barrier layer 2, a side vertical groove 3, a threaded groove 4, an upper semiconductor cooler TEC5, a lower semiconductor cooler The cooler TEC6 is combined together. The metal cylinder 1 is composed of copper and alumin...

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Abstract

The invention provides a device for increasing a stimulated Brillouin scattering threshold value in a high-power single-frequency optical fiber laser device. The device comprises a metal cylinder, barrier layers, a side vertical slot, a threaded slot, an upper semiconductor refrigerator TEC and a lower semiconductor refrigerator TEC, wherein the metal cylinder is formed by jointly combining a plurality of metal fan-shaped bodies made from different materials; the different metal fan-shaped bodies are arrayed alternately; the metal fan-shaped bodies in the hollow part of the metal cylinder are isolated by the barrier layers; the side vertical slot is formed in the outer side of the metal cylinder; the threaded slot which is a single internal thread is etched in the side of the metal cylinder from top to bottom; and an active dual-wrapping-layer optical fiber is compactly coiled in the threaded slot, and the threaded slot is filled with heat conduction silicone grease for heat dissipation. The device disclosed by the invention can effectively increase the stimulated Brillouin scattering threshold value in the high-power single-frequency optical fiber laser device, realizing high-power, high-beam-quality and stable outputting of single-frequency optical fiber laser, and is very simple and compact in structure.

Description

technical field [0001] The invention relates to laser application fields such as high-power fiber lasers and single-frequency fiber lasers, and in particular to a device for increasing the stimulated Brillouin scattering threshold in high-power single-frequency fiber lasers. Background technique [0002] High-power single-frequency fiber lasers have unique advantages in terms of power level and linewidth characteristics, and are widely used in laser pointing and ranging, lidar, spectroscopy, nonlinear frequency conversion, coherent beam combining and other fields. Generally, a low-power narrow-linewidth single-frequency laser is used as the seed source, and the main oscillation power amplification (MOPA) structure of the seed source is used to achieve its high-power and narrow-linewidth output performance. However, due to the narrow linewidth of the seed source laser in this structure, and the relatively limited core size and long active length of the active double-clad fi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/13
Inventor 杨昌盛徐善辉杨中民冯洲明张勤远姜中宏
Owner SOUTH CHINA UNIV OF TECH
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