Observation of undamped pulsations in a low-pressure, far-infrared laser and comparison with a simple theoretical model
Anno: 1985
Autori: Abraham N.B., Dangoisse D., Glorieux P., Mandel P.
Affiliazione autori: Bryn Mawr College, Bryn Mawr, PA; Istituto Nazionale di Ottica, Firenze, Italy;
Dip. di Fisica, Università di Firenze, Italy;
Lab. de Spectroscopie Hertzienne, Associé au Cenre Nazional de la recherche Scientifique, Lille I, Universite, Villeneuve-d’Asq, France;
Universite Libre de Brussels, Service de Chimie-Physique II, Belgium
Abstract: Experimental details of undamped pulsations are presented for a low pressure, far-infrared (FIR) laser optically pumped by a single-freqeuncy CO2 laser in a standing-wave configuration for both the pumping and the FIR lasing action. Spontaneous pulsing in the single-mode HC00H FIR laser at 742 microns was observed when the cavity was tuned to the FIR resonance and when the CO2 laser of high intensity was sufficiently detuned from the resonance of the pump transition to excite two distinct velocity groups of molecules to contribute the the FIR gain. Theoretical results, based on studies of a model for a laser with two distinct resonant species forming the gain medium, provide a basis for understanding the origin of these instabilities. The model compares satisfactorily with the observed FIR instabilities including the variations in pulsing frequencies observed experimentally as the CO2 laser is detuned.
Giornale/Rivista: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B: OPTICAL PHYSICS
Volume: 2 (1) Da Pagina: 23 A: 34
Parole chiavi: carbon dioxide lasers; far infrared radiation; infrared lasersDOI: 10.1364/JOSAB.2.000023Citazioni: 29dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui