Multiple semiconductor laser beam combining system

Abstract

The invention discloses a multiple semiconductor laser beam combining system which comprises a first semiconductor laser set used for emitting a first group of original basic light sources, a second semiconductor laser set used for emitting a second group of original basic light sources, a first double-side substrate reflector set used for reflecting the first group of original basic light sources and the second group of original basic light sources so as to generate a first group of reflecting light, a third semiconductor laser set used for emitting a third group of original basic light sources, a fourth semiconductor laser set used for emitting a fourth group of original basic light sources, a second double-side substrate reflector set used for reflecting the second group of original basic light sources so as to generate a second group of reflecting light, and at least one polarization beam splitter located in the intersection position of the light path of the first group of reflecting light and the light path of the second group of reflecting light and used for enabling the first group of reflecting light to pass vertically and the second group of reflecting light to pass after being refracted 90 degrees.

Description

technical field [0001] The invention relates to the field of semiconductor lasers, in particular to a beam combining system for multiple semiconductor lasers. Background technique [0002] Using multiple low-power semiconductors for beam recombination to generate high-power laser is a common method to increase laser power. Common incoherent multi-beam compounding technologies also include: spatial compounding, wavelength compounding, and polarization compounding. Among them, the incoherent multi-beam composite technology combines multiple beams into one beam under the premise of ensuring the quality of multiple beams remains unchanged, which can ensure that the beam quality remains unchanged under the premise of increasing power. [0003] The published Chinese invention patent CN102590962A introduces a system for coupling multiple unit semiconductor lasers to optical fibers. The first problem is that a 45° reflector is added to the optical path of the first group of substra...

AI Technical Summary

Problems solved by technology

[0003] The published Chinese invention patent CN102590962A introduces a system for coupling multiple unit semiconductor lasers to optical fibers. The first problem is that a 45° reflector is added to the optical path of the first group of substrate reflectors, which brings unstable factors. Affects the stability of the overall laser

The second problem is that the substrate mirror assembly can only reflect on one side, and multiple unit semiconductors are located on one side of the substrate mirror, so as the number of unit semiconductors increases, the volume of the overall laser becomes large, and it is located on the substrate. The space on the other side of the mirror is not well utilized

The third problem is that the distance between each unit semiconductor and the lens for coupling at the front end of the fiber is not equal, resulting in different spot sizes at the lens for coupling at the front end of the fiber, and the overall spot distribution is uneven, which affects fiber coupling.

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