Optical beam combining device of semiconductor laser and optical path control method thereof

Abstract

The invention discloses an optical beam combining device of a semiconductor laser and an optical path control method thereof. The optical beam combining device comprises a single-tube laser, a collimating lens, a focusing lens and frosted glass, which are connected in sequence, as well as an illuminating lens at the rear end, wherein light emitted from the single-tube laser as a light source respectively collimates light beams emitted by the single-tube laser through the collimating lens, and then is focused onto the rough surface of the frosted glass by the focusing lens; the rough surface of the frosted glass is used for combining, superimposing and homogenizing two laser beams; and then the illuminating lens at the rear end is used for collecting, collimating and emitting the light beams. The invention provides a method for combining beams by using a single-tube infrared semiconductor laser, completely abandons the optical fibers with high processing requirements, poor reliability and short service life, and can effectively improve the light outputting power of an infrared illuminator so as to satisfy requirements for long-distance light supplementation.

Description

technical field [0001] The invention relates to the field of semiconductor lasers, in particular to a semiconductor laser optical beam combining device and an optical path control method thereof. Background technique [0002] In long-distance night vision monitoring, high-power infrared semiconductor lasers are more and more widely used in the field of long-distance night vision supplementary light. In this type of laser lighting system, the light output power of the illuminator will be an important factor affecting the lighting distance and fill light effect. In order to effectively increase the light output power of the laser illuminator, the current common practice in the industry is to use multimode optical fibers to couple into many beams of infrared semiconductor lasers to increase the light output power. However, due to the inherent characteristics of optical fibers and strict process requirements, such laser illuminators have problems such as large size, poor reliab...

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Problems solved by technology

However, due to the current high-power infrared semiconductor laser single-tube power is not high (currently the maximum power of a single tube is 10W)

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