Lasers

On the possible effect of absorption at the Xe₂Cl(6²Г ← 4²Г) transition on the generation spectrum of the Xe₂Cl(4²Г → 1²Г) laser

V. A. Alekseev

NRC "Kurchatov Institute" – I.V. Grebenshchikov Institute of Silicate Chemistry of the Russian Academy of Sciences, 199034, St. Petersburg, Russia

Abstract: Spectrа of the Xe₂Cl(4²Г → 1²Г) laser transition and transitions from the Xe₂Cl(4²Г) state to the highlying states were modelled using the previously obtained results of quantum chemical (ab initio) calculations of the electronic structure and the dipole moment functions of optical transitions of the Xe₂Cl molecule. It has been established that the long wavelength wing of the laser transition band overlaps with the short wavelength wing of the Xe₂Cl(6²Г ← 4²Г) absorption band; the long wavelength threshold in the known from the literature generation spectra of the Xe₂Cl(4²Г → 1²Г) laser is located in the specified overlap region. The possible effect of absorption at the Rg₂X(6²Г ← 4²Г) transition on the generation spectra of other Rg₂X(4²Г → 1²Г) lasers, as well as a number of other issues related to intracavity absorption in the active medium of lasers of this type are discussed, in particular, absorption at transitions from metastable states of Rg atoms.

Keywords: active laser media, intracavity absorption, excimer lasers, rare gas halides.

Received: 04.11.2023
Revised: 30.01.2024
Accepted: 30.01.2024

 English version: Quantum Electronics, 2024, 51:suppl. 4, S263–S273