LASER DEVICE AND METHOD OF DETERMINING A MALFUNCTION OF A LASER DIODE

LASER DEVICE AND METHOD OF DETERMINING A MALFUNCTION OF A LASER DIODE

The present invention relates to a laser device, comprising at least one laser diode configured to emit radiation, with an output power of the radiation depending on a laser diode driving current, a photodiode configured to receive the radiation emitted by the at least one laser diode, wherein the r...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: WOLF, Robert, GERLACH, Philipp Henning, SOFKE, Soren, WEIDENFELD, Susanne
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BASIC ELECTRIC ELEMENTS
DEVICES USING STIMULATED EMISSION
ELECTRICITY
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Beschreibung
Zusammenfassung:The present invention relates to a laser device, comprising at least one laser diode configured to emit radiation, with an output power of the radiation depending on a laser diode driving current, a photodiode configured to receive the radiation emitted by the at least one laser diode, wherein the received radiation induces a photodiode current in the photodiode in dependence on the output power of the received radiation, circuitry configured to measure the photodiode current for a laser diode driving current, determine a virtual laser threshold current (Ith2) of the at least one laser diode from the measured photodiode current as a measure of an actual laser threshold current of the at least one laser diode. Further, a method of monitoring the output power of a laser diode is described.