Patent · US Active

Method and apparatus for monitoring the optical output power of a laser diode with an associated photodiode and particle sensor device

US11646545B2 · kind B2 · utility

0Cited by

9References

17Claims

0Family size

Assignees

TRUMPF PHOTONIC COMPONENTS GMBH · DE
Robert Bosch GmbH · DE

Inventors

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

Key dates

Filing date	Jul 29, 2019
Grant date	May 9, 2023
Priority date	—
Expiry date	Aug 3, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH01S5/4025
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The present invention provides methods and an apparatus for monitoring the optical output power of a laser diode (LD) having an associated photodiode (PD), and a particle sensor apparatus. The photodiode (PD) is operable together with the laser diode (LD), wherein it detects the light (LS) of the laser diode (LD) and converts it into an electrical current, and is thermally coupled to the laser diode (LD). Monitoring of the optical output power P is effected during the operation of the laser diode (LD) and is based on current measurements and/or voltage measurements at the laser diode (LD) and at the photodiode (PD).

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