EP 1310023 A2 20030514 - METHOD AND DEVICE FOR DETERMINING THE OUTPUT POWER OF A SEMICONDUCTOR LASER DIODE
Title (en)
METHOD AND DEVICE FOR DETERMINING THE OUTPUT POWER OF A SEMICONDUCTOR LASER DIODE
Title (de)
VERFAHREN UND VORRICHTUNG ZUR BESTIMMUNG DER AUSGANGSLEISTUNG EINER HALBLEITERLASERDIODE
Title (fr)
PROCEDE ET DISPOSITIF POUR DETERMINER LA PUISSANCE DE SORTIE D'UNE DIODE LASER A SEMI-CONDUCTEUR
Publication
Application
Priority
- DE 0102998 W 20010808
- DE 10042022 A 20000808
Abstract (en)
[origin: WO0213340A2] The invention relates to a method and device for determining the output power of a semiconductor laser diode, which is operated with a diode current (Id). According to the invention, a defined measuring current (Im), which is less than the threshold current of the semiconductor laser diode (HLD) is conducted in a conducting direction through the semiconductor laser diode (HLD). The forward voltage (Uf) decreasing over the semiconductor laser diode (HLD) is measured, and the temperature of the laser-active region of the semiconductor laser diode (HLD) is determined from the measured forward voltage (Uf) by using at least one calibration curve. The invention makes a simple and precise determination of the output voltage possible without requiring an additional measuring device, for example, a monitor diode.
IPC 1-7
IPC 8 full level
H01S 5/068 (2006.01); H01S 5/06 (2006.01)
CPC (source: EP US)
H01S 5/06808 (2013.01 - EP US); H01S 5/0617 (2013.01 - EP US)
Citation (search report)
See references of WO 0213340A2
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 0213340 A2 20020214; WO 0213340 A3 20030109; DE 10042022 A1 20020307; EP 1310023 A2 20030514; US 2003156606 A1 20030821; US 6853657 B2 20050208
DOCDB simple family (application)
DE 0102998 W 20010808; DE 10042022 A 20000808; EP 01962612 A 20010808; US 36400303 A 20030210