Quantum cascade lasers with large optical waveguides

Author

Gresch, T. ; Giovannini, M. ; Hoyer, N. ; Faist, J.

Author_Institution

Inst. of Phys., Univ. of Neuchatel

Volume

18

Issue

3

fYear

2006

Firstpage

544

Lastpage

546

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2005.863633

Filename

1580560