Laser light source and method for producing a laser light source

摘要

A laser light source comprises, in particular, a semiconductor layer sequence (10) having an active region (45) and a radiation coupling-out area (12) having a first partial region (121) and a second partial region (122) different than the latter, and a filter structure (5), wherein the active region (45) generates, during operation, coherent first electromagnetic radiation (51) having a first wavelength range and incoherent second electromagnetic radiation (52) having a second wavelength range, the coherent first electromagnetic radiation (51) is emitted by the first partial region (121) along an emission direction (90), the incoherent second electromagnetic radiation (52) is emitted by the first partial region (121) and by the second partial region (122), the second wavelength range comprises the first wavelength range, and the filter structure (5) at least partly attenuates the incoherent second electromagnetic radiation (52) emitted by the active region along the emission direction (90).

主权项

1. A laser light source, comprising:
a semiconductor layer sequence having an active region and a radiation coupling out area having a first partial region and a second partial region different than the first partial region; and a filter structure, wherein
the active region generates, during operation, coherent first electromagnetic radiation having a first wavelength range and incoherent second electromagnetic radiation having a second wavelength range,the coherent first electromagnetic radiation is emitted by the first partial region along an emission direction,the incoherent second electromagnetic radiation is emitted by the first partial region and by the second partial region,the second wavelength range comprises the first wavelength range,the filter structure at least partly attenuates the incoherent second electromagnetic radiation emitted by the active region along the emission direction,the filter structure comprises a filter layer applied on the radiation coupling-out area on the first partial region and on the second partial region, andthe filter layer comprises a non-transparent material on the second partial region and a transparent oxide, nitride or oxynitride on the first partial region, the transparent oxide, nitride or oxynitride being an oxide, nitride or oxynitride of the non-transparent material.