Semiconductor laser beam combiner and beam combining method

Abstract

The present invention discloses a semiconductor laser beam combiner and a beam combining method. The beam combiner comprises: a semiconductor laser set, a fast-axis collimation lens set, a slow-axis collimation lens set, a fast-axis and slow-axis switching device, a Fourier transform lens, an optical grating and a reflector. The semiconductor laser set is configured to emit a beam set with the same direction; the fast-axis collimation lens set is configured to reduce a fast-axis direction divergence angle of the beam set; the slow-axis collimation lens set is configured to reduce a slow-axis direction divergence angle of the beam set; the fast-axis and slow-axis switching device is configured to switch a fast-axis direction and a slow-axis direction of the beam set; the Fourier transform lens is configured to perform Fourier transform of the beam set and perform focusing of the beam set; the optical grating is configured to perform diffraction of the focused light; and the reflector isconfigured to receive light after diffraction and perform feedback of part of the light to the optical grating so as to perform feedback of the part of the light to the rear cavity surface of a semiconductor laser to achieve stable outer cavity locking and allow the other part of the light to perform enhancement output. Light beam quality better than a single tube is achieved.

Description

Technical field [0001] The present invention relates to the technical field of semiconductor lasers, and more specifically, to a beam combining device and a beam combining method of a semiconductor laser. Background technique [0002] With the continuous development of science and technology, semiconductor lasers have been widely used in people's daily life and work, bringing great convenience to people's lives. [0003] Semiconductor lasers have significant advantages in terms of efficiency, volume, lifespan, and integration. They have great application prospects in industrial and military fields. However, semiconductor lasers often have problems such as high power, large divergence angle and poor beam quality, which cannot satisfy civilian use. , Industry, military and other fields. [0004] There are many existing beam combining methods for semiconductor lasers, such as spatial combining, waveguide combining, spectral combining, coherent combining, and polarization combining. Am...

AI Technical Summary

Problems solved by technology

Among them, coherent beam combining and spectral beam combining have obvious advantages in improving the beam quality, but they have not surpassed the beam quality of a single tube. In the traditional method involving external cavity beam combining, the output coupling mirror is an indispensable one. device, however, the beam combining system will ultimately not exceed the beam quality of the single device

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