Title :
Gain/loss device study of narrow-ridge buried heterostructure quantum cascade lasers using broadband infrared transmission
Author :
Friedli, P. ; Sigg, H. ; Wittmann, A. ; Faist, J.
Author_Institution :
Lab. for Micro- & Nanotechnol., Paul Scherrer Inst., Villigen, Switzerland
Abstract :
Narrow-ridge buried heterostructure quantum cascade lasers (QCL) were investigated using mid-infrared (mid-IR) transmission spectroscopy at the IR beamline of the Swiss Light Source (SLS). The notable advantage in brilliance of such a synchrotron source compared to that of a Globar (typically a factor of 100) means that high-resolution broadband transmission spectra for the analysis of the gain coefficient at constant waveguide core temperature can be taken. This represents an important extension of transmission studies on working single mode QCL devices, for the determination of key laser parameters.
Keywords :
infrared spectroscopy; quantum cascade lasers; Globar; IR beamline; Swiss Light Source; broadband infrared transmission; gain coefficient; high-resolution broadband transmission spectra; mid-infrared transmission spectroscopy; narrow-ridge buried heterostructure quantum cascade lasers; synchrotron source; Infrared spectra; Laser modes; Laser sintering; Light sources; Propagation losses; Quantum cascade lasers; Spectroscopy; Synchrotrons; Temperature; Waveguide lasers;
Conference_Titel :
Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-4079-5
Electronic_ISBN :
978-1-4244-4080-1
DOI :
10.1109/CLEOE-EQEC.2009.5191923