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Soviet Journal of Quantum Electronics

Phase conjugation of XeCl excimer laser radiation by excitation of various types of stimulated light scattering

Vladimir Boris Karpov, Владлен Васильевич Коробкин, Д. А. Долголенко

Published Nov 30, 1991• 10 citations
Publisher

Abstract

Phase conjugation of XeCl excimer laser radiation (λ = 308 nm) was investigated using two different types of stimulated scattering: stimulated Brillouin scattering (STBS) and stimulated thermal scattering (STTS). It was shown that STTS may be caused by linear and multiphoton absorption, whilst STBS may be suppressed by loss of phase matching caused by absorption. The phase conjugation quality deteriorates on transition from STBS to STTS.

DOI
10.1070/qe1991v021n11abeh004509

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Soviet Journal of Quantum Electronics•Apr 30, 1990•0 citations
Phase conjugation of XeCl excimer laser radiation (λ = 308 nm) was investigated using two different types of stimulated scattering: stimulated Brillouin scattering (STBS) and stimulated thermal scattering (STTS). It was shown that STTS may be caused by linear and multiphoton absorption, whilst STBS may be suppressed by loss of phase matching caused by absorption. The phase conjugation quality deteriorates on transition from STBS to STTS.
Phase conjugation (PC) of XeCl laser radiation using two different kinds of stimulated scattering, i.e., stimulated temperature scattering (STS) and stimulated Brillouin scattering (SBS), is investigated. It is shown that STS can be stimulated both by the linear and multiphoton absorption, and that SBS can be suppressed by the effect of phase-matching violation caused by the multiphoton absorption. The quality of PC deteriorates when SBS is replaced by STS. The two possible reasons for this deterioration are discussed.
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.