Dependence of the Linewidth Enhancement Factor on the Temperature Induced Detuning of a Distributed Feedback Grating in a Quantum Cascade Laser

Autor:	Wolfgang Elsässer, Guido Giuliani, Tobias Gensty, Ch. Mann, J. Von Staden
Rok vydání:	2007
Předmět:	Distributed feedback laser Materials science business.industry Physics::Optics Grating Laser Semiconductor laser theory law.invention Laser linewidth Optics law Blazed grating Optoelectronics Physics::Atomic Physics business Quantum cascade laser Diffraction grating
Zdroj:	2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference.
Popis:	The linewidth enhancement factor (or alpha parameter) describes the coupling of amplitude and phase in a semiconductor laser. In quantum cascade lasers, the self-mixing effect necessary for single mode operation, is usually realized by using a distributed feedback grating. Such a grating is optimized to work for a special wavelength at a fixed temperature. If the temperature of the laser device differs from the optimum temperature the grating was designed for, there is a detuning of the grating wavelength from the gain peak. We investigate the effect of this detuning on the value of the linewidth enhancement factor.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8cba0e31ae8d3d896b88f9f9b3d29867 https://doi.org/10.1109/cleoe-iqec.2007.4385946 Zobrazit plný text záznamu