Patent ID: 8369370
Filing Date: 2013-02-05
Classification: H01S

Abstract:
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 comprising at least one first filter element disposed downstream of the semiconductor layer sequence in an emission direction; 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; wherein the coherent first electromagnetic radiation is emitted by the first partial region along the emission direction; wherein the incoherent second electromagnetic radiation is emitted by the first partial region and by the second partial region; wherein the second wavelength range comprises the first wavelength range; wherein the filter structure at least partly attenuates the incoherent second electromagnetic radiation emitted by the active region along the emission direction; wherein the coherent first electromagnetic radiation has a first intensity and the incoherent second electromagnetic radiation has a second intensity which is less than the first intensity, the at least one first filter element having an intensity-dependent transmissivity for electromagnetic radiation; and wherein the first filter element is non-transparent to electromagnetic radiation having an intensity greater than or equal to the second intensity; and wherein the intensity-dependent transmissivity for electromagnetic radiation of the at least one first filter element has a saturation behavior.