External-cavity-beam-combination semiconductor laser fiber coupling module

Abstract

The invention relates to an external-cavity-beam-combination semiconductor laser fiber coupling module. The external-cavity-beam-combination semiconductor laser fiber coupling module comprises a plurality of single-tube semiconductor lasers of the same wavelength; each single-tube semiconductor laser is fixed on an arc-shaped heat sink; and multiple light beams emitted by the single-tube semiconductor lasers enter a diffraction grating through different inclination angles, light spots are overlapped on the diffraction grating, the external-cavity feedback and wavelength locking of the light beams emitted by all the single-tube semiconductor lasers are realized in a resonant cavity formed by rear cavity faces of the lasers and an external cavity mirror under the light splitting function of the diffraction grating and the feedback action of the external cavity mirror, the multiple light beams are combined into one light beam by the diffraction grating so as to realize external-cavity beam combination, and finally the light beam is coupled into a multimode fiber through a focusing mirror. According to the external-cavity-beam-combination semiconductor laser fiber coupling module, the light beams emitted by the single-tube semiconductor lasers are combined and output in beam quality of a single laser, so that the fiber coupling module has the advantages of small core diameter, high power and high-beam-quality laser output.

Description

technical field [0001] The invention relates to the technical field of single-tube semiconductor lasers, in particular to an external cavity combining semiconductor laser fiber coupling module. Background technique [0002] Because the single-tube semiconductor laser has the advantages of high beam quality, good heat dissipation, and long life, the fiber-coupled module made of single-tube beam combining technology has great advantages in laser medical treatment, fiber laser pumping, laser monitoring, and laser processing. Wide range of applications. However, with the development of semiconductor laser technology application in recent years, there are higher requirements for the output power and beam quality of fiber-coupled modules in practical applications. Most of the beam combining of single-tube semiconductor lasers in the world adopts the traditional spatial beam combining method, because the spatial beam combining is only to make the beams closely superimpose multiple...

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Problems solved by technology

[0004] In order to solve the problems of low output brightness and poor beam quality of the beam combining module in the existing single-tube semiconductor laser beam combining t

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