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Longitudinal carrier density measurement of high power broad area laser diodes

Messung der Ladungsträgerdichte in Hochleistungs-Breitstreifenlaserdioden in Längsrichtung
: Rinner, F.; Rogg, J.; Friedmann, P.; Mikulla, M.; Weimann, G.; Poprawe, R.


Applied Physics Letters 80 (2002), No.1, pp.19-21
ISSN: 0003-6951
ISSN: 1077-3118
Journal Article
Fraunhofer IAF ()
Fraunhofer ILT ()
Laserdiode; Diodenlaser; spontaneous emission; spontane Emission; carrier density; Ladungsträgerdichte; longitudinal; Längsrichtung

The longitudinal carrier density distribution of an InGaAlAs high-power broad-area semiconductor laser has been measured using spontaneous emission from the side of the device. The laser shows continuously increasing carrier densities on the facet with the high reflectivity coating (reverse facet). This has a major impact on the efficiency and the lifetime of the laser. This behavior is in good agreement with one-dimensional calculations for the longitudinal carrier distribution.