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Proceedings Paper

Ultrashort-pulse propagation in double Raman gas mixtures with temporal compression
Author(s): Sergey Alexsandrovich Lobanov; Victor G. Bespalov; Dmitry I. Staselko; Vitaly N. Krylov; I. Fischer
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Paper Abstract

Transient SRS in mixture of two Raman active media (doubled gas mixtures) with pumping by ultrashort (2 ps) pulses was theoretically analysed. The numerical simulations show that there is strong energy exchange between direct Stokes waves and combination Stokes line during ultrashort pulse propagation in gas mixture. It is necessary to achieve the same phase and temporal dependencies of direct Stokes pulses for effective energy conversion in combination Stokes line. One-peak pulse generation in combination Stokes line with temporal compression is possible at pump intensity from threshold value up to doubled level. The decrease of duration of pulse by 12 times at conversion efficiency of 6% was shown. Increase of input pump energy causes destruction of Stokes pulses form and formation of multipeak Stokes pulses. The results show that the optimum ratio of gas pressure for transient SRS generation of sum and difference combination Stokes lines is proportional to the relation of the g/T2 of mixture components or to the relation of their Raman cross-sections. Our calculation is in good agreement with experimental results1.

Paper Details

Date Published: 12 April 2001
PDF: 5 pages
Proc. SPIE 4271, Optical Pulse and Beam Propagation III, (12 April 2001); doi: 10.1117/12.424691
Show Author Affiliations
Sergey Alexsandrovich Lobanov, St. Petersburg Institute of Fine Mechanics and Optics (Russia)
Victor G. Bespalov, S.I. Vavilov State Optical Institute (Russia)
Dmitry I. Staselko, S.I. Vavilov State Optical Institute (Russia)
Vitaly N. Krylov, Swiss Federal Institute of Technology/Zurich (Switzerland)
I. Fischer, Swiss Federal Institute of Technology/Zurich (Switzerland)


Published in SPIE Proceedings Vol. 4271:
Optical Pulse and Beam Propagation III
Yehuda B. Band, Editor(s)

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