A Wavelength Beam Combiner Device with Brewster's Angle of Incidence

Abstract

The invention relates to the field of a semiconductor laser, in particular to a wavelength beam combining mirror device realizing Brewster angle incidence, which comprises a first laser, a first collimation system, a wavelength beam combining mirror, a second collimation system and a second laser, wherein one surface of a wavelength beam combining mirror is a film coating surface, the other side of the wavelength beam combining mirror is not the film coating surface, the non-film-coating surfaces of the first laser, the first collimation system and the wavelength beam combining mirror are positioned at the same side, the film coating surfaces of the second laser, the second collimation system and the wavelength beam combining mirror are positioned at the same side, an included angle theta B1 between the optical axis of the first collimation system and the normal line of the wavelength beam combining mirror is the same as the included angle theta B2 between the optical axis of the second collimation system and the normal line of the wavelength beam combining mirror. The wavelength beam combining mirror device has the advantages that the film coating difficulty is low, the film layer number is small, the corresponding stress is small, the transmission light realizes the Brewster angle incidence, the plating of any film is not needed at the incidence side, in addition, the transmission rate is theoretically 100 percent when the P light realize the Brewster angle incidence, the processing cost is reduced, and simultaneously, the beam combining efficiency is improved.

Description

technical field [0001] The invention relates to the field of semiconductor lasers, in particular to a wavelength beam combining mirror device incident at a Brewster angle. Background technique [0002] Limited by the output power of a single semiconductor laser, high-power semiconductor lasers must be implemented with multiple unit devices through multiple couplings, mainly including spatial beam combining, polarization combining and wavelength combining. The general method is to stack multiple unit devices in space to form a single-wavelength linearly polarized laser output sub-module with a large output power, and then use polarization beam combining to obtain a single-wavelength module with twice the power and power density, and finally Then, wavelength combining is used to finally obtain a wide-spectrum semiconductor laser light source with several times higher power and power density. The disadvantages of this method: 1. The dichroic film coated on the wavelength beam ...

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Problems solved by technology

[0003] In view of the above situation, in order to solve the defects of the prior art, the object of the present invention is to provide a wavelength beam combiner device incident at the Brewster angle, which can effectively solve the shortcomings of difficult coating and low beam combining efficiency

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