Original Paper
Gain spectra and current-induced change of refractice index in (In/Al)GaN diode lasers
Abstract
Adapting the Hakki–Paoli method for blue laser diodes we measure gain spectra for (In/Al)GaN on SiC substrate laser diodes in the low carrier density regime. From the measured longitudinal mode spacing we calculate the effective refractive index and can exclude a mode spacing ‘anomaly’. We demonstrate that the substrate has a considerable influence on the modal gain. (© 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
