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Coherent beam combination all-fiber laser

A fiber laser and coherent beam forming technology, applied in the laser device, the structure/shape of the optical resonator, the light guide, etc., can solve the problem of high power output difficulty, and achieve good resistance to thermal and optical damage, good scalability, The effect of high power output

Inactive Publication Date: 2009-12-30
山东中科致美激光科技有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

There are obvious defects in this type of existing technology: the fiber coupler used should simultaneously load the energy of two or more fiber lasers. Due to the limitation of the inherent damage threshold of the fiber coupler, the prior art has a lot of problems in achieving high power output. big difficulty

Method used

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  • Coherent beam combination all-fiber laser
  • Coherent beam combination all-fiber laser
  • Coherent beam combination all-fiber laser

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Embodiment Construction

[0016] see figure 1 The structure of Embodiment 1 of the present invention is a coherent bundled all-fiber laser composed of two fiber lasers 5, which includes: a fiber grating H-FBG1 with high reflection to laser light (such as a reflectivity of 50%, 70%, etc.), Two pigtail output semiconductor pump sources LD2, two fiber pump beam combiners PC3, gain fiber 4, two fiber gratings L-FBG6 with low reflection to laser light (such as reflectivity 5%, 10%, etc.) and The collimation output system OC7, the high reflective fiber grating H-FBG1, the fiber pump beam combiner PC3, the gain fiber 4 and the low reflective fiber grating L-FBG6 together constitute the resonant cavity of the fiber laser 5.

[0017] The pigtail output semiconductor pump source LD2 is connected to the pump fiber 10 of the fiber pump combiner PC3. The two ends of the fiber grating H-FBG1 with high laser reflection are respectively connected to the signal fibers of the two fiber pump beam combiners PC3, and the ...

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Abstract

The invention relates to a coherent beam combination all-fiber laser which comprises fiber lasers and a collimated output system, wherein the combination of the fiber lasers comprises a high-reflecting fiber grating for highly reflecting lasers, tail fiber output semiconductor pumping sources, fiber pumping beam combiners, gain fibers and low-reflecting fiber gratings for lowly reflecting lasers; the tail fiber output semiconductor pumping sources are connected with the fiber pumping beam combiners; the high-reflecting fiber grating is respectively connected with the fiber pumping beam combiners; one end of each the low-reflecting fiber grating is connected with the fiber pumping beam combiners through the gain fibers; and the other end of each low-reflecting fiber grating is connected with the collimated output system for realizing collimated output. The invention provides the coherent beam combination all-fiber laser which can improve the injection coupling effect between the lasers, improve the heat-light injury resistance of the system and realize high-power output.

Description

technical field [0001] The invention relates to a fiber laser, in particular to a coherent beam all-fiber laser. Background technique [0002] Fiber lasers have the advantages of simple structure, good heat dissipation, high conversion efficiency, stable performance, and high beam quality. High-power fiber lasers can be widely used in industrial processing, modern defense, medical engineering and other fields. Although the output power of a single fiber laser has reached the level of kilowatts, the current development of fiber lasers cannot meet the application requirements in some fields. In addition to the lack of power, the main reason is that many existing high-power optical fibers The laser is a pump-coupling technology using bulk optical components, which has poor stability and environmental adaptability, and cannot give full play to many advantages of fiber lasers. Therefore, the development of high-power all-fiber laser technology has been highly valued by people. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/23H01S3/067H01S3/08G02B6/00
Inventor 段开椋王建明王屹山赵卫
Owner 山东中科致美激光科技有限公司
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