ASE atomic lines observed under optical pumping of Yb vapors by KrF* laser radiation
V.G. Sokovikov1, V.E. Prokop’ev2, A.V. Klimkin1
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2High Current Electronics Institute of the Siberian Branch of the RAS, 634055, Tomsk, 2/3, Academichesky ave. HCEI SB RAS
Keywords: пары металлов, оптическая накачка, лазеры на парах металлов, электронное вынужденное комбинационное рассеяние, усиленное спонтанное излучение, metal vapors, optical pumping, metal vapor lasers, stimulated electronic Raman scattering, amplified spontaneous emission
Abstract
Results on quasi-resonant optical pumping of Yb vapors by KrF* laser radiation (λp = 248 nm) are presented. The converted radiation is studied in the visible range available for visual observation. Strong lines of amplified spontaneous emission are detected. These lines are due to transitions between the even groups (6s5d 1D2, 6s6d 3D1, 2, 3) and odd levels (6s6p 1P01, 6s6p 3P0, 1, 2) of ytterbium. Coherent radiation is detected on Yb resonance lines with λ = 398.8 and 555.6 nm, which are caused, respectively, by 6s6p 1P01 ® 6s6s 1S0 and 6s6p 3P01 ® 6s6s 1S0 transitions in the Yb atom. A sequence of processes that lead to the formation of inversion at the Yb atomic transitions is qualitatively examined.
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