Title: Temperature dependent gain characteristics in GaN-based vertical-cavity surface-emitting lasers
Authors: Lu, Tien-Chang
Cheng, Bo-Siao
Liu, Mei-Chung
Department of Photonics
Issue Date: 26-Oct-2009
Abstract: Temperature dependent gain characteristics and linewidth enhancement factor (alpha-factor) of vertical-cavity surface-emitting lasers with InGaN/GaN multiple quantum wells were studied by measuring the photoluminescence spectra below the threshold condition and analyzed by using the Hakki-Paoli method. The optical gain and differential gain showed a more rapid increase as a function of the injected carriers as temperature decreased. The alpha-factor for the lasing mode was estimated as 2.8 at room temperature and decreased to a value as low as 0.6 at 80 K. (C) 2009 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.17.020149
ISSN: 1094-4087
DOI: 10.1364/OE.17.020149
Volume: 17
Issue: 22
Begin Page: 20149
End Page: 20154
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