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Acta Optica Sinica

Stimulated collision-induced fluorescence of barium triplex-states

Yuanshun Huo

Published Jan 1, 1990• 0 citations
OpenAlex

Abstract

The stimulated collision-induced fluorescence (SCF) at wavelengths of 551.9, 606.3, and 611.1 nm was observed from XeCl-laser pumped barium vapor for the first time. They correspond to the following transitions of barium atoms respectively: 6s6d3D2-6s6p3P1, 5d6p2-6s5d3D3, and 5d6p2P1-6s5d3D2. The possibility of exis-tance of the barium spin-forbidden transition 6s7d1dD-6s6p3P2 was proposed and discussed.

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Stimulated Collision-induced Fluorescence in XeCl-laser-pumped Barium Vapour at High Buffer-gas Pressures

Yunsheng Huo

New stimulated collision-induced fluorescence lines at 551·9, 606·3 and 611·1 nm were observed in XeCl-laser-pumped barium vapour at high buffer-gas pressures. They correspond to barium 6s6d 3D2-6s6p 3P1 and 5d6p 3P2, 1-6s5d 3D3, 2 transitions, following a preceding spin-forbidden transition 6s7p 1P1-6s6d 3D2. A similarity was found to exist between this 6s7p 1P1-6s6d 3D2 transition and the well studied 6s6p 1P1-6s5d 3D2 transition.

Journal of Modern Optics•Jul 1, 1991•0 citations

Cascade stimulated collision-induced fluorescence in barium vapor

Yanshi Zhao, Yusan Wang, Yu Shisheng +1 more

Lines at 354.5 nm (6s5f3F30 - 6s5d3D2), 394.4 nm (6s8d3D2 - 6s6P3P16), 410.0 nm (6s8d3D3 - 6s6P3P20) and 973.5 nm (5d7p1P10 - 6s7s1S0) in barium vapor have been observed and identified as cascade stimulated collision-induced fluorescence originated from some end states of stimulated Raman scattering.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Oct 28, 1992•0 citations

Stimulated Raman scattering and stimulated collision-induced fluorescence in barium vapor

Aorong Ding

The stimulated collision-induced fluorescence (SOF) at wavelengths of 472.6nm, 582.6nm and 648.3nm, as well as Raman-shifted radiation at wavelength of 475nm were observed in barium vapor pumped by broadband pulse of the XeOl laser. The SCF was found to be self-termination short pulses with FWHM of 8 ns, and its internsity inoreased with buffer-gas pressure. There existed time delay aa long as 20 ns between the front edges of the pump pulse and of the Raman-shifted pulse, and the Raman conversion efficiency decreased significantly as the buffer-gas pressure increasing.

Acta Optica Sinica•Jan 1, 1988•0 citations

Stimulated collision-induced fluorescence and stimulated Raman scattering in barium vapor pumped by XeCl laser radiation

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Optics Communications•Aug 1, 1988•2 citations

Investigation of electronic stimulated Raman scattering of excimer laser radiation by metal atoms

V S Verkhovskiĭ, Vladimir M. Klimkin, В. Е. Прокопьев +3 more

An experimental investigation was made of stimulated Raman scattering (STRS) of excimer laser radiation in barium, thulium, and europium vapors. The energy of XeF* laser radiation ( λ = 351 nm) converted to the yellow range (585 nm) in barium vapor was 6 mJ and the conversion efficiency was ∼39%. The spectral composition of the converted radiation is governed by the STRS, by four-wave parametric processes, and also by lasing due to the natural barium transition. Selection of the pump frequencies is required to concentrate the converted radiation at a single frequency and to reduce its divergence. Stimulated Raman scattering of XeCl* laser radiation ( λ = 308 nm) was achieved in thulium vapor at λ = 422 nm. In europium vapor in quasiresonance with the 6 s 2 8 S 0 1/2 –5 d 2 10 P 0 11/2 forbidden transition, stimulated emission was obtained due to the natural 5 d 2 10 P 0 11/2 –6 s 6 p 10 P 11/2 and 5 d 2 10 P 0 11/2 –6 s 6 p 10 P 3/2 transitions.

Soviet Journal of Quantum Electronics•Nov 30, 1982•9 citations

Two-step photoionization of barium atoms through excited P 1 1 , 3 levels in optical dense approximation

Н. И. Косарев

Abstract The kinetics of two-step photoionization of barium atoms through excited P 1 1 , 3 levels was studied by numerical simulation method in the optically dense approximation. The first laser at wavelength λ 1 = 553.5 nm ( λ 1 = 791 nm) pumps transition S 0 1 ↔ P 1 1 ( S 0 1 ↔ P 1 3 ). The second laser with λ 2 = 266 nm ( λ 2 = 310 nm) ionizes atoms from the level P 1 1 ( P 1 3 ). The third probe laser with wavelength λ i = 493.41 nm causes resonant fluorescence of barium ions. It is shown that the metastable D 2 3 from the D 1 , 2 , 3 3 triplet in barium is strongly populated through P 1 <

Physica Scripta•Dec 19, 2022•0 citations
The stimulated collision-induced fluorescence (SCF) at wavelengths of 551.9, 606.3, and 611.1 nm was observed from XeCl-laser pumped barium vapor for the first time. They correspond to the following transitions of barium atoms respectively: 6s6d3D2-6s6p3P1, 5d6p2-6s5d3D3, and 5d6p2P1-6s5d3D2. The possibility of exis-tance of the barium spin-forbidden transition 6s7d1dD-6s6p3P2 was proposed and discussed.
The stimulated collision-induced fluorescence (SOF) at wavelengths of 472.6nm, 582.6nm and 648.3nm, as well as Raman-shifted radiation at wavelength of 475nm were observed in barium vapor pumped by broadband pulse of the XeOl laser. The SCF was found to be self-termination short pulses with FWHM of 8 ns, and its internsity inoreased with buffer-gas pressure. There existed time delay aa long as 20 ns between the front edges of the pump pulse and of the Raman-shifted pulse, and the Raman conversion efficiency decreased significantly as the buffer-gas pressure increasing.
An experimental investigation was made of stimulated Raman scattering (STRS) of excimer laser radiation in barium, thulium, and europium vapors. The energy of XeF* laser radiation ( λ = 351 nm) converted to the yellow range (585 nm) in barium vapor was 6 mJ and the conversion efficiency was ∼39%. The spectral composition of the converted radiation is governed by the STRS, by four-wave parametric processes, and also by lasing due to the natural barium transition. Selection of the pump frequencies is required to concentrate the converted radiation at a single frequency and to reduce its divergence. Stimulated Raman scattering of XeCl* laser radiation ( λ = 308 nm) was achieved in thulium vapor at λ = 422 nm. In europium vapor in quasiresonance with the 6 s 2 8 S 0 1/2 –5 d 2 10 P 0 11/2 forbidden transition, stimulated emission was obtained due to the natural 5 d 2 10 P 0 11/2 –6 s 6 p 10 P 11/2 and 5 d 2 10 P 0 11/2 –6 s 6 p 10 P 3/2 transitions.
Abstract The kinetics of two-step photoionization of barium atoms through excited P 1 1 , 3 levels was studied by numerical simulation method in the optically dense approximation. The first laser at wavelength λ 1 = 553.5 nm ( λ 1 = 791 nm) pumps transition S 0 1 ↔ P 1 1 ( S 0 1 ↔ P 1 3 ). The second laser with λ 2 = 266 nm ( λ 2 = 310 nm) ionizes atoms from the level P 1 1 ( P 1 3 ). The third probe laser with wavelength λ i = 493.41 nm causes resonant fluorescence of barium ions. It is shown that the metastable D 2 3 from the D 1 , 2 , 3 3 triplet in barium is strongly populated through P 1 <