Precise Facet Temperature Distribution of High- Power Laser Diodes: Unpumped Window Effect

A thermoreflectance technique is used to evaluate the temperature variations at the output facet of high-power GaAs-based laser diodes emitting at 980 nm. Two kinds of diodes with different unpumped windows (UPWs) are studied to determine the influence of UPW length on the temperature variation. We...

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Bibliographic Details
Published in:IEEE photonics technology letters 2015-05, Vol.27 (9), p.1002-1005
Main Authors: Michaud, Jeremy, Del Vecchio, Pamela, Bechou, Laurent, Veyrie, David, Bettiati, Mauro Andrea, Laruelle, Francois, Grauby, Stephane
Format: Article
Language:English
Subjects:
catastrophic optical degradation
Diode lasers
facet temperature variation
Heating
laser diode
Measurement by laser beam
Optics
Physics
Probes
Reflectivity
Semiconductor lasers
Temperature measurement
unpumped window
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Summary:A thermoreflectance technique is used to evaluate the temperature variations at the output facet of high-power GaAs-based laser diodes emitting at 980 nm. Two kinds of diodes with different unpumped windows (UPWs) are studied to determine the influence of UPW length on the temperature variation. We show that in the vicinity of the active region, where a catastrophic optical damage is most susceptible to occur, the short UPW diode heats much more (up to 40%) than the long UPW one.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2015.2405090