Title :
Quantum cascade lasers with large optical waveguides
Author :
Gresch, T. ; Giovannini, M. ; Hoyer, N. ; Faist, J.
Author_Institution :
Inst. of Phys., Univ. of Neuchatel
Abstract :
Quantum cascade lasers with large optical cavities that exhibit low waveguide losses, high saturation intensities, and low beam divergence, emitting between lambdaap4.3 and 5.2mum were studied. Peak-pulsed powers up to 14 W at 15 K and 5 W at 280 K at lambdaap5.2 mum are demonstrated. A full-width at half-maximum of only 30deg was measured for the transverse far-field pattern of the device operating at lambdaap4.3 mum, a significant reduction compared to conventional waveguides
Keywords :
laser beams; laser cavity resonators; optical losses; quantum cascade lasers; waveguide lasers; 15 K; 280 K; beam divergence; optical cavities; optical waveguides; quantum cascade lasers; saturation intensities; transverse far-field pattern; waveguide losses; Biomedical optical imaging; Equations; Optical buffering; Optical saturation; Optical sensors; Optical waveguides; Quantum cascade lasers; Quantum well lasers; Semiconductor waveguides; Stimulated emission; Optical waveguides; quantum-well devices; semiconductor epitaxial layers; semiconductor heterojunction; semiconductor lasers; semiconductor waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.863633
