Optical path system of laser and laser

By introducing optical path length increasing elements into semiconductor lasers and utilizing multiple refracted light rays, the problem of excessively large size of high-power lasers has been solved, enabling effective applications in confined spaces.

CN114678763BActive Publication Date: 2026-06-09WUHAN RAYCUS FIBER LASER TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN RAYCUS FIBER LASER TECHNOLOGY CO LTD
Filing Date
2022-04-21
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In existing semiconductor lasers, as power increases, the size of the chip's light-emitting area increases, which requires a slow-axis collimating lens with a large focal length, resulting in an excessively large laser size that is difficult to use in confined spaces.

Method used

An optical path lengthening element, including multiple reflective surfaces and an intermediate reflective surface, is used to refract light multiple times within the optical path lengthening element, thereby increasing the optical path length without changing the distance between the slow-axis collimating lens and the light-emitting element, thus meeting the requirements for long focal lengths.

Benefits of technology

Without increasing the size of the laser, the long focal length requirement of the slow-axis collimating lens is met, and the size of the optical path system and the laser is reduced.

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Abstract

The application discloses a light path system of a laser and the laser. The light path system comprises a light emitting element, a mirror and a light path increasing element. The light emitting element is capable of emitting light. The mirror is arranged opposite to a light emitting surface of the light emitting element and is used for reflecting the light. The light path increasing element is located between the light emitting element and the mirror. The light path increasing element comprises a first reflecting surface, a plurality of intermediate reflecting surfaces and a second reflecting surface. The first reflecting surface is arranged opposite to the light emitting surface of the light emitting element. The light is reflected by the first reflecting surface, the plurality of intermediate reflecting surfaces and the second reflecting surface in sequence and then enters the mirror. The incident light of the first reflecting surface and the emergent light of the second intermediate reflecting surface are located in the same plane. The light path increasing element in the embodiment of the application can increase the light path of the light under the premise that the distance between the slow-axis collimating mirror and the light emitting element is not changed, so that the spatial requirement of the long focal length of the slow-axis collimating mirror is met, and the size of the light path system and the laser is reduced.
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