Title :
Precise Facet Temperature Distribution of High- Power Laser Diodes: Unpumped Window Effect
Author :
Michaud, Jeremy ; Del Vecchio, Pamela ; Bechou, Laurent ; Veyrie, David ; Bettiati, Mauro Andrea ; Laruelle, Francois ; Grauby, Stephane
Author_Institution :
Lab. Ondes et Mater. d´Aquitaine, Univ. de Bordeaux, Talence, France
Abstract :
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.
Keywords :
III-V semiconductors; gallium arsenide; quantum well lasers; temperature distribution; thermoreflectance; GaAs; active region; catastrophic optical damage; high-power GaAs-based laser diodes; output facet; precise facet temperature distribution; thermoreflectance technique; unpumped window effect; wavelength 980 nm; Diode lasers; Heating; Measurement by laser beam; Probes; Reflectivity; Semiconductor lasers; Temperature measurement; Catastrophic optical degradation; catastrophic optical degradation; facet temperature variation; laser diode; unpumped window; unpumped window.;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2405090
