Laser device and method of determining a malfunction of a laser diode

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United States of America

PATENT NO 12015240
SERIAL NO

17313014

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Abstract

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A laser device includes a laser diode configured to emit radiation, an output power of the radiation being dependent on a laser diode driving current, and a photodiode configured to receive the radiation emitted by the laser diode. A photodiode current induced in the photodiode by the received radiation is dependent on a power of the received radiation. The laser device further includes circuitry configured to measure the photodiode current for a laser diode driving current and calculate a laser threshold current of the laser diode from the measured photodiode current as a measure of an actual laser threshold current of the laser diode. The circuitry is further configured to detect a malfunction or degradation of the laser diode.

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Patent Owner(s)

Patent OwnerAddress
ROBERT BOSCH GMBHWERNERSTRABE 1 PATENTABTEILUNG HERR STEIGER STUTTGART 70469
TRUMPF PHOTONIC COMPONENTS GMBHLISE-MEITNER-STRASSE 13 ULM 89081

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gerlach, Philipp Henning Ulm, DE 17 77
Sofke, Soren Tuebingen, DE 4 4
Weidenfeld, Susanne Weilheim, DE 5 3
Wolf, Robert Dresden, DE 79 669

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