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Space coupler

A space coupling and mode scrambler technology, applied in the optical field, can solve problems such as equipment safety damage, and achieve the effect of reducing the return light and the probability of burning

Active Publication Date: 2021-01-12
WUHAN RAYCUS FIBER LASER TECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a spatial coupler and system, which is used to solve the defect that the reverse fiber core light causes damage to the safety of the equipment during the operation of the high-power continuous laser, and realize efficient and safe return light isolation

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Embodiment Construction

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] In high-power all-fiber lasers, the cladding structure of the cladding fiber inevitably contains residual pumping light, amplified spontaneous emission, and signal light leaked due to factors such as non-ideal splicing and fiber bending, which will deteriorate the output The beam quality of the laser can even damage the semiconductor pumpin...

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Abstract

The embodiment of the invention provides a space coupler, which comprises a shell, an input lens system and an output lens system which are positioned in the shell and are sequentially arranged on a laser light path, and at least one diaphragm, wherein the diaphragm is arranged in the shell and is positioned on the laser light path; and the diaphragm is used for losslessly passing through the forward laser and attenuating the reversely transmitted return laser. Furthermore, the space coupler further comprises a light beam shaping double-end optical cable, at least one mode scrambler is arranged at the input end of the light beam shaping double-end optical cable, and the mode scrambler is used for exciting a passing low-order core mode into a high-order core mode. According to the space coupler provided by the embodiment of the invention, the diaphragm is additionally arranged in a conventional spatial coupler, so that return light which is coupled back to an input system again is greatly reduced, and the probability that a laser is burnt by the return light is effectively reduced.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a space coupler for anti-high reflection. Background technique [0002] As a new type of laser, fiber laser has been widely used in industrial processing, and has shown unique advantages in cutting, welding, cladding and other fields. In recent years, the development trend of fiber lasers is not only to continuously increase the output power, but also to multi-functional development, so that fiber lasers can be applied to materials that could not be processed before, and the processing effect is better. For metal materials with dry reflection ability such as copper and aluminum, when the fiber laser is used to process them, the surface of the metal material will generate very strong reflected laser light, which will be reversely coupled into the fiber laser, thereby destroying the fiber laser. internal device. The returning laser light will be reversely transmitted inside the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/26G02B6/32
CPCG02B6/262G02B6/266G02B6/32
Inventor 沈翔李榕祝启欣黄中亚施建宏李成闫大鹏雷星赵文利汤立磊
Owner WUHAN RAYCUS FIBER LASER TECHNOLOGY CO LTD
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