Effect of stimulated emission on the distribution of CO molecules over vibrational levels
| Autor: | G. M. Grigorian, Igor' V Kochetov |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Physics
education.field_of_study Population Physics::Optics Statistical and Nonlinear Physics Electron Atomic and Molecular Physics and Optics Spectral line Electronic Optical and Magnetic Materials Distribution function Excited state Physics::Space Physics Stimulated emission Physics::Chemical Physics Electrical and Electronic Engineering Atomic physics Absorption (chemistry) education Lasing threshold |
| Zdroj: | Quantum Electronics. 38:940-944 |
| ISSN: | 1468-4799 1063-7818 |
| DOI: | 10.1070/qe2008v038n10abeh013777 |
| Popis: | The vibrational distribution function (VDF) of CO molecules is measured in the presence and absence of generation in a CO laser pumped by a longitudinal dc discharge. Kinetic equations for the VDF and the Boltzmann equation for the energy distribution function of electrons are solved simultaneously in a theoretical model. A comparison of the experimental and calculated lasing spectra and VDF demonstrates their good agreement. By introducing an absorbing cell with different gases (NO, C2H4, CO2, C6H6) into a resonator, the influence of selection of laser lines on the lasing spectrum and the VDF of CO molecules is studied. It is shown experimentally that the population of CO molecules at vibrational levels involved in lasing and at higher levels strongly decreases and the VDF at lower levels changes insignificantly. It is demonstrated that the VDF shape of CO molecules at high vibrational levels can be changed by introducing intracavity absorption. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|