Title :
Ultrafast probing of the complex refractive index in an active mid infrared quantum cascade laser
Author :
Parz, W. ; Muller, T. ; Austerer, M. ; Strasser, G. ; Unterrainer, K. ; Wilson, L.R. ; Cockburn, J.W. ; Krysa, A.B. ; Roberts, And J S
Author_Institution :
Inst. of Photonics & Center for MicroNanostrucutres, Vienna Univ. of Technol., Vienna
Abstract :
Time and phase resolved spectroscopy of broadband mid infrared pulses transmitted through the active medium of a mid infrared quantum cascade laser reveal the full complex refractive index and its derivatives over a wide spectral range. Using electro-optic sampling, we can monitor the optical response even above threshold and study effects of gain depletion and decoherence.
Keywords :
high-speed optical techniques; light coherence; quantum cascade lasers; refractive index; refractive index measurement; time resolved spectroscopy; active mid infrared quantum cascade laser; broadband mid infrared pulses; complex refractive index; decoherence; electro-optic sampling; gain depletion; optical response; phase resolved spectroscopy; time resolved spectroscopy; ultrafast probing; Infrared spectra; Monitoring; Optical pulses; Optical refraction; Optical variables control; Quantum cascade lasers; Refractive index; Sampling methods; Spectroscopy; Ultrafast optics; (140.5965) Semiconductor lasers, quantum cascade; (300.6530) Spectroscopy, ultrafast;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
