US 12,470,043 B2
Laser source, LIDAR system and method for controlling a laser source
Hubert Halbritter, Dietfurt-Toeging (DE)
Assigned to AMS-OSRAM INTERNATIONAL GMBH, Regensburg (DE)
Appl. No. 18/044,388
Filed by ams-Osram International GmbH, Regensburg (DE)
PCT Filed Aug. 30, 2021, PCT No. PCT/EP2021/073894
§ 371(c)(1), (2) Date Mar. 8, 2023,
PCT Pub. No. WO2022/053345, PCT Pub. Date Mar. 17, 2022.
Claims priority of application No. 10 2020 123 560.7 (DE), filed on Sep. 9, 2020.
Prior Publication US 2023/0327402 A1, Oct. 12, 2023
Int. Cl. H01S 3/13 (2006.01); G01J 9/02 (2006.01); G01S 7/481 (2006.01); G01S 17/08 (2006.01); H01S 5/062 (2006.01); H01S 5/068 (2006.01); H01S 5/0687 (2006.01); H01S 5/02 (2006.01); H01S 5/183 (2006.01)
CPC H01S 5/0622 (2013.01) [G01J 9/0246 (2013.01); G01S 7/4814 (2013.01); G01S 17/08 (2013.01); H01S 5/06808 (2013.01); H01S 5/0687 (2013.01); G01J 2009/0257 (2013.01); G01J 2009/0288 (2013.01); H01S 5/021 (2013.01); H01S 5/183 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A laser source, comprising:
a laser diode;
a modulation device comprising a current source; wherein the modulation device is configured to modify a current intensity impressed into the laser diode, and thereby modify an emission frequency of the laser diode; and
a feedback device configured to feed a feedback signal to the modulation device, the signal being dependent on the intensity in a predetermined wavelength range;
wherein the feedback device comprises a plurality of interferometers, each of which is configured to generate a signal from a measuring beam branched off from the emitted electromagnetic radiation, the intensity of the signal changing periodically as a function of the emission wavelength, and wherein the measurement beam is divided into a plurality of partial beams, each of which is fed to a different interferometer, and
wherein the feedback device further comprises a selection device configured to select the signal of that interferometer which exhibits linear dependence of the intensity on the wavelength, and to feed the feedback signal to the modulation device, so as to modify a current intensity impressed by the current source into the laser diode as a function of the electromagnetic radiation emitted by the laser diode.