Light beam shaping system of semiconductor laser arrays

Abstract

The invention provides a light beam shaping system of semiconductor laser arrays which are densely lined in one dimension and in two dimensions and are not densely lined in two dimensions. A light beam cutting device in the optical shaping system comprises a plurality of cuboid transparent optical material layers which are stacked and have equal thickness; angles between light beam incident end surfaces in all layers which are sequentially lined along a stacking direction and side surfaces which are in parallel with light beam incident directions are increasing or decreasing; and vertical distances between incident end surfaces and emission end surfaces in all the layers or the distances along the incident directions of light beams are same. A light beam rearrangement unit of the optical shaping system is made of a cuboid transparent optical material, and the cuboid is uniformly divided into a plurality of layers along a thickness direction; each layer contains an air gap band; the inclination angles of the air gap bands in all the layers are same or complementary; and the band width values of the air gap bands of the layers which are sequentially lined along the thickness direction form a decreasing arithmetic progression. The light beam cutting unit and the light beam rearrangement unit contain the same number of layers, and the stacking directions of the layers are vertical.

Description

technical field [0001] The invention relates to an optical system, in particular to a beam shaping system of a semiconductor laser array. Background technique [0002] Semiconductor lasers have been widely used due to their high electro-optical conversion efficiency, small size and light weight. However, a single semiconductor laser cannot output extremely high power (greater than 100 watts), so a laser array in which multiple semiconductor lasers are arranged together to form a bar array and a plurality of bar arrays are stacked to form a planar array has emerged. Restricted by technology, cooling, shaping methods, etc., the semiconductor laser array cannot be made very long, and it is generally about 10mm at present. The semiconductor lasers that make up the semiconductor laser array are generally edge-emitting semiconductor lasers. This semiconductor laser includes a p-n junction, the current is injected perpendicular to the p-n junction, and the laser is emitted from th...

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Problems solved by technology

[0010] The object of the present invention is to provide a beam shaping system of a semiconductor laser array to overcome the complex design of the beam cutting unit and the beam rearranging unit used in the above beam shaping system, difficult assembly, inaccurate positioning, large cumulative error, and difficult adjustment. one or more of the shortcomings

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