High-power semiconductor laser beam expanding system

Abstract

The invention provides a high-power semiconductor laser beam expanding system which can expand beams at high multiplying power and is simple and compact in structure, small in size and low in cost. The principle includes that after the beams emitted by a laser pass a beam splitter of a first beam splitting module, half of the beams directly transmit, the other half of the beams enter a reflector after reflection, the beams entering the reflector are reflected again, the beams and the other half transmitting beams are parallelly emitted, are expanded by two multiplying powers once, enter a second beam splitting module and are expanded again, and the beams are repeatedly expanded in the mode.

Description

technical field [0001] The invention belongs to the field of laser applications, and in particular relates to a laser beam expander. Background technique [0002] Laser has the advantages of good monochromaticity, good directionality, good coherence and high brightness, and has been widely used in various fields of national economy. The diameter of the beam emitted by the laser is very small, usually 1-2mm. In some specific applications, such as laser processing, laser detection and laser lighting, it is necessary to use a larger diameter laser beam, which requires a beam expander system to achieve . In laser processing applications, in order to improve processing efficiency, it is necessary to use a beam expander system to increase the laser spot; in laser lighting applications, the laser spot is required to be large and uniform, and the beam expander system is required to expand the spot diameter before using it as a light source. The laser beam expander system can not o...

AI Technical Summary

Problems solved by technology

Due to the constraints of the above factors, this kind of beam expansion system is not suitable for large-magnification beam expansion, which will cause the system to be bulky and inconvenient to use, and the processing material of the lens is generally glass, and the cost of making a large-magnification beam expansion lens is relatively high.

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