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2006
Conference Paper
Titel
Spectral tuning and mode competition in quantum cascade lasers studied by time-resolved Fourier transform spectroscopy
Alternative
Untersuchung des Abstimmverhaltens und der Modenkonkurrenz von Quantenkaskadenlasern mittels zeitaufgelöster Fourier Transform Spektroskopie
Abstract
We present a study of the spectral characteristics of Fabry-Perot quantum cascade lasers in pulsed mode operation applying a time resolution of 3 ns in combination with a high spectral resolution of 0.02 cm-1. With this technique the laser spectra were investigated applying pulse lengths ranging between 100 ns and 20 µs and duty cycles between 0.01% and 10%. Depending on the current density and operation temperature, the spectra exhibit complex line patterns, which indicate mode competition caused by gain saturation effects.
Author(s)