Patent · US Active

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

US12015240B2 · kind B2 · utility

0Cited by

3References

13Claims

0Family size

Assignee

TRUMPF PHOTONIC COMPONENTS GMBH · DE

Inventors

Philipp Henning Gerlach · Ulm, DE
Susanne Weidenfeld · Weilheim, DE
Robert Wolf · Dresden, DE
Soren Sofke · Reutlingen, DE

Key dates

Filing date	May 6, 2021
Grant date	Jun 18, 2024
Priority date	—
Expiry date	Oct 7, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH01S5/423
WIPO fieldOptics
WIPO sectorInstruments

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.