Dispersive gain and loss in midinfrared quantum cascade laser

Autor:	Dmitry G. Revin, Quankui Yang, Christian Manz, John W. Cockburn, Joachim Wagner, M. R. Soulby
Rok vydání:	2008
Předmět:	Distributed feedback laser Active laser medium Materials science Physics and Astronomy (miscellaneous) business.industry Far-infrared laser Gain Physics::Optics law.invention Quantum dot laser law Optoelectronics Semiconductor optical gain Laser power scaling Quantum cascade laser business
Zdroj:	Applied Physics Letters. 92:081110
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.2884699
Popis:	We report the measurements of dispersive gain (simultaneous coexistence of gain and losses on a single intersubband transition) in a quantum cascade laser. Broadband transmission spectra through the waveguide of a λ∼4.7μm In0.53Ga0.47As∕AlAs0.56Sb0.44∕InP quantum cascade laser have been studied at a bias below laser threshold and at different temperatures. For a certain range of current, and at temperatures higher than about 150K, the transmission spectra show clear dispersive gain/loss behavior with the possibility for intersubband gain to be observed even without global population inversion between laser levels.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::32068086a94a479cc750bcf7fbf4712d https://doi.org/10.1063/1.2884699 Zobrazit plný text záznamu