Watt level laser fiber beam combining device based on multimode fibers

Abstract

The present invention discloses a watt level laser fiber beam combining device based on multimode fibers. The watt level laser fiber beam combining device comprises a laser generation module, a fiber beam combining module and a vibration motor. The output end of the laser generation module is connected with the input end of the fiber beam combining module, and the output end of the fiber beam combining module is wound on the vibration motor. The laser generation module emits multiple beams of watt level visible laser and enables the multiple beams of watt level visible laser to be coupled in the fibers, the multiple beams of watt level visible laser are combined into a beam of composite laser via the fiber beam combining module, and the vibration motor vibrates and drives the output end of the fiber beam combining module to vibrate to thereby eliminate the speckles in the composite laser. The watt level laser fiber beam combining device has lower parts precision requirements, can eliminate the speckles in the composite laser in a more economic manner, and can output the high-quality flat-topped light beams.

Description

technical field [0001] The invention belongs to the field of fiber lasers, and more specifically relates to a multimode fiber-based watt-level laser fiber combining device. Background technique [0002] In the application of lasers, it is necessary to combine multiple beams of watt-level visible light lasers with different wavelengths into one composite laser beam to act on the research object. For example, when performing fluorescence imaging on biological samples labeled with fluorescent proteins or fluorescent dyes, multiple beams Watt-level visible light laser beams of different wavelengths are combined into a composite laser beam for observing biological samples. In order to obtain a large field of view and high-quality imaging effects, the laser beam combining device is required to have high stability, high coupling efficiency, high combination degree, withstand watt-level laser power, and output composite laser with small speckle. [0003] In the prior art, multiple ...

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Problems solved by technology

[0004] In view of the above defects, the present invention provides a watt-level laser fiber combining device based on multimode fiber, which is used to solve the speckle phenomenon caused by the interference between the modes of the laser beam in the multimode fiber transmission process, thereby The composite laser light intensity output by the existing optical fiber beam combining device presents the technical problems of speckle distribution and poor spot quality

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