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Multi-core fiber laser and preparation method of the same

A multi-core optical fiber and laser technology, applied in the coupling of optical waveguides, the structure/shape of the active medium, etc., can solve the problems of complex structure and high manufacturing difficulty, and achieve high conversion efficiency, avoid nonlinear effects, and compact structure.

Inactive Publication Date: 2016-01-27
山东圣达激光科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

This MOPA structure requires the production of a multi-core fiber coupler with a single-core to multi-core transition function, which is complex in structure and difficult to manufacture

Method used

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  • Multi-core fiber laser and preparation method of the same
  • Multi-core fiber laser and preparation method of the same
  • Multi-core fiber laser and preparation method of the same

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0037] like figure 1 As shown, a multi-core fiber laser includes a multi-core N×1 fiber pump coupler 1, (wherein N≥2) the output end of the multi-core N×1 fiber pump coupler 1 is according to the pumping light The output direction is sequentially connected with a multi-core high-reflection fiber grating 2, a multi-core active fiber 3 and a multi-core low-reflection fiber grating 4.

[0038] The pump light coupled into the multi-core fiber by the N×1 fiber pump coupler 1 is injected into the multi-core active fiber 3 through the ...

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Abstract

The invention discloses a multi-core fiber laser. The multi-core fiber laser includes a multi-core N*1 fiber pumping coupler, wherein an output end of the multi-core N*1 fiber pumping coupler is welded with a multi-core high reflectivity fiber grating, a multi-core active fiber and a multi-core low reflectivity fiber grating successively according to the output direction of the pump light; the multi-core N*1 fiber pumping coupler is coupled with the pump light in the multi-core fiber, and injects the pump light into the multi-core active fiber through the multi-core high reflectivity fiber grating; under the effect of the multi-core high reflectivity fiber grating and the multi-core low reflectivity fiber grating, lasing of laser is formed in each core; and then the pump light is output through the multi-core low reflectivity fiber grating. The cores should be aligned to each other completely only when the multi-core high reflectivity fiber grating and the multi-core low reflectivity fiber grating are respectively welded with the multi-core active fiber, and the cores need not to be aligned to each other when the multi-core N*1 fiber pumping coupler is welded with the multi-core high reflectivity fiber grating, so the manufacturing difficulty of the multi-core fiber laser can be reduced and the stability of the multi-core fiber laser system can be improved.

Description

technical field [0001] The invention relates to a fiber laser, in particular to a multi-core fiber laser and a preparation method thereof. Background technique [0002] Due to the advantages of good beam quality, compact structure, high conversion efficiency, and stable system, fiber lasers have become a hot spot in application research in various fields. With the continuous expansion of application fields, the market has put forward higher requirements for the output power and beam quality of fiber lasers. [0003] Although a single-mode laser with a single fiber output exceeding 1kW has been achieved in the laboratory, and the realization of this laser requires strict conditions, it is difficult for engineering applications; but with the development of laser technology applications, as well as material processing, space communications, laser radar, optoelectronics The development of countermeasures and laser weapons requires high-power, high-quality, high-intensity and ul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067G02B6/255
Inventor 王本平
Owner 山东圣达激光科技有限公司
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