Blue light semiconductor laser wavelength combining device and method based on star reflection

Abstract

The invention discloses a blue light semiconductor laser wavelength combining device and method based on star reflection, and belongs to the technical field of semiconductor laser wavelength combining. It includes multiple semiconductor laser emitting units, semi-transparent and half-reflective prisms, inner cylindrical mirrors, slow-axis collimating lenses and output coupling lenses. The semiconductor laser emitting unit is used to emit multiple beams; the slow-axis collimating lens is used to make each The output beams are emitted to the beam combining channel at the same angle; the semi-transparent and half-reflective prism is used to reflect the beam coming from above and transmit the lower beam so that the two beams propagate in the same direction in the beam combining channel to form a combined beam; the inner column The surface reflector is used to change the direction of the combined beam to make it wavelength-combined with the next beam; the output coupling lens is used to output the final combined beam. On the premise of ensuring that the output beams have better beam quality, the invention allows more beams emitted by semiconductor laser emitting units to participate in wavelength combining, and significantly improves the efficiency of wavelength combining.

Description

technical field [0001] The invention belongs to the technical field of semiconductor laser wavelength beam combining, and more specifically relates to a blue semiconductor laser wavelength beam combining device and method based on star reflection. Background technique [0002] Semiconductor lasers are divided into mid-to-far infrared lasers, near-infrared lasers, visible light lasers, ultraviolet lasers and other categories according to wavelength. Among them, blue light semiconductor lasers are semiconductor lasers with output wavelengths in the range of 400nm to 500nm. Blue light semiconductor lasers, like blue LED lights, generally use GaN-based semiconductor materials. By laminating GaN-based semiconductor crystal layers on a GaN substrate, blue laser light can be obtained directly. The infrared semiconductor laser output light is converted into 1 / 2 wavelength light by using an optical waveguide element. For example: using an 850nm infrared semiconductor laser, a blue-...

AI Technical Summary

Problems solved by technology

[0013] Aiming at the above defects or improvement needs of the prior art, the present invention provides a blue light semiconductor laser wavelength beam combining device based on star reflection, the purpose of which is to combine wavelength beams through a semi-transparent half-reflective prism and an inner cylindrical reflector. The components, using the principles of reflection, refraction and transmission, allow more light beams emitted by semiconductor laser emitting units to participate in wavelength combining under the premise of ensuring that the output beam has better beam quality, thereby solving the problem of wavelength in the prior art. Technical Problems of Low Beam Combining Efficiency of Beam Combining System

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