Near-infrared diode laser spectroscopic study of Dicke narrowing and pressure broadening in the oxygen A-band

Autor:	Subir Bhattacharyya, Pradip N. Ghosh, Anindya Hazra
Rok vydání:	1994
Předmět:	Silicon Spectrometer Physics::Instrumentation and Detectors business.industry Organic Chemistry chemistry.chemical_element Photodetector Laser Analytical Chemistry law.invention Inorganic Chemistry Semiconductor Optics chemistry law Torr Atomic physics business Spectroscopy Line (formation) Diode
Zdroj:	Journal of Molecular Structure. 327:139-144
ISSN:	0022-2860
Popis:	A near-infrared diode laser spectrometer based on GaAlAs semiconductor diodes is described. Thermally tuned laser radiation is frequency modulated and detected by a silicon photodetector. The signal is obtained by a phase sensitive method. The line shapes of the rovibronic transitions of the oxygen A-band have been measured at pressures varying between 30 and 400 Torr. The line shapes exhibit collisional (Dicke) narrowing which can be reproduced by the simulation of the soft collision model line profile of Galatry (Phys. Rev., 122 (1961) 1218). At higher pressure the line shape exhibits linear pressure broadening.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1bfaa093d1ba36837c87b09c5fd911c2 https://doi.org/10.1016/0022-2860(94)08153-0 Zobrazit plný text záznamu