Title :
Time resolved spectroscopy of dynamics in mid infrared quantum cascade lasers below and above threshold
Author :
Parz, W. ; Müller, T. ; Austerer, M. ; Strasser, G. ; Unterrainer, K. ; Wilson, L.R. ; Cockburn, J.W. ; Krysa, A.B. ; Roberts, J.S.
Author_Institution :
Vienna Univ. of Technol., Vienna
Abstract :
The spectral gain profile and modal gain coefficient can be measured by coupling a broadband mid infrared pulses generated by phase matched difference frequency mixing in a 30 mum thick GaSe crystal . This enables us to detect the transmitted light by coherent detection facilitating the electro optic effect in a crystal. The advantage of time resolved spectroscopy enables easy access to dynamic parameters of a InGaAs/AlInAs/InP QCL during operation even above threshold.
Keywords :
III-V semiconductors; aluminium compounds; electro-optical effects; gallium arsenide; indium compounds; laser beams; laser variables measurement; optical frequency conversion; optical materials; optical phase matching; optical pulse generation; quantum cascade lasers; time resolved spectroscopy; GaSe; InGaAs-AlInAs-InP; broadband mid infrared pulse generation; coherent detection; difference frequency mixing; electro optic effect; mid infrared quantum cascade lasers; modal gain coefficient; optical phase matching; size 30 mum; spectral gain profile; time resolved spectroscopy; Frequency measurement; Gain measurement; Infrared spectra; Optical frequency conversion; Optical pulse generation; Phase measurement; Pulse measurements; Quantum cascade lasers; Spectroscopy; Thickness measurement;
Conference_Titel :
Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-0931-0
Electronic_ISBN :
978-1-4244-0931-0
DOI :
10.1109/CLEOE-IQEC.2007.4386254
