Device for improving spacial distribution of output beams output of multimode fibers

A multi-mode fiber, spatial distribution technology, applied in the field of laser applications, can solve the problems of difficult re-adjustment, difficult to ensure consistency, inconvenient installation and adjustment, etc., to improve the spatial distribution of the output beam, reduce the sensitivity, and achieve a uniform output spot. Effect
CN101630045AInactive Publication Date: 2010-01-20BWT BEIJING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BWT BEIJING
Publication Date
2010-01-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a device for improving the spacial distribution of output beams of multimode fibers. The invention adopts the principle that single-point or multipoint or continuous distributed external stress is exerted on a short length of multimode fibers for transmitting laser to change the transmission mode distribution of light in the multimode fibers, thereby the spacial distribution of beams output form end planes of fibers can be changed. The device is especially suitable for semiconductor laser devices output by fiber coupling. After packaging is completed, the spacial distribution of output beams is improved according to specific use requirement. The device has the advantages of simple use, rapidness and good applicability.
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Description

technical field

[0001] The invention is applied to fiber coupling packaging of various lasers, especially semiconductor lasers, and belongs to the field of laser applications. Background technique

[0002] There are many laser applications that require laser output through multimode fibers, such as semiconductor laser pumping solid-state lasers, laser marking, laser cutting, laser plate making, laser lighting, etc. Many of these applications require that the spatial distribution of the beam output from the multimode fiber must be smooth, symmetrical, or uniform, such as flat top-shaped distribution, Gaussian-like distribution, etc. However, due to its inherent characteristics, it is difficult to directly meet these requirements in practice. For example, for a high-power semiconductor laser coupled through a multimode fiber, the divergence angle of the emitted beam of the laser die in the direction of the fast axis is 30°-40°, and the divergence angle of the slow axis is 6°-...

Claims

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