Laser bars having trenches

Abstract

The invention relates to a laser bar (1) comprising a semiconductor layer (11) having multiple layers and an active zone (15), wherein the active zone (15) is arranged in an x-y plane, wherein laser diodes (12) each form a mode space (4) in an x-direction between two end surfaces, wherein the mode spaces (4) of the laser diodes (12) are arranged next to one another in y-direction, wherein a trench(3) is provided in the semiconductor layer (11) between two mode spaces (4), wherein the trenches (3) extend in the x-direction, and wherein the trenches (3) extend from an upper side of the semiconductor layer (11), in the z-direction up to a predetermined depth in the direction of the active zone (15).

Description

technical field

[0001] The present invention relates to a laser rod according to claim 1 and a method for manufacturing a laser rod according to claim 18 .

[0002] The present invention takes priority from German application 10 2016 103 358.8, the disclosure of which is hereby incorporated by reference. Background technique

[0003] High-performance diode lasers are known in the prior art from DE 196 44 941 C1, in which the laser bar has a plurality of laser diodes, wherein the laser diodes are separated from each other by predetermined breaking points in the laser bar. After welding the laser bar to a heat sink with a small coefficient of expansion and cooling, the grooves lead to the nominal breaking point and cause the break. Due to the physical separation of the laser bar, the application of welding can be realized with a lower ductility at room temperature, since destruction of the individual laser diodes of the laser bar can be excluded due to mechanical stress. Fur...

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