Analysis of the dynamic behavior of a q-switched CO2-laser – the linear and the nonlinear regime

Anno: 1992

Autori: Meucci R., Ciofini M., Wang PY.

Affiliazione autori: Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy;
Institute of Physics, Academia Sinica, beijing, China

Abstract: We study the dynamics of a Q-switched CO2 laser in order to compare two different molecular models. One is the two-level model, the other is the four-level model which includes the coupling of each resonant level with a set of rotational levels of the same vibrational band. By measurement of the first passage time distributions, we verify that the statistics of the laser build-up in the linear regime is model-independent. In contrast the dynamics of the laser intensity in the nonlinear amplification regime and the long time relaxation process to the steady state are correctly explained only by using the four-level model with different relaxation rates of the two vibrational bands.

Giornale/Rivista: OPTICS COMMUNICATIONS

Volume: 91 (5-6)      Da Pagina: 444  A: 452

Maggiori informazioni: This work was partly supl orted by the E.C. Contrast No SC1\”-CT91-0697( ?STS).
Parole chiavi: Passage-time statistics; Saturable absorbers; Delayed bifurcations; 4-level model; Swept pump
DOI: 10.1016/0030-4018(92)90372-X

Citazioni: 39
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
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