Stimulated Raman scattering in compressed gases by short laser pulses

A. I. Vodchits, W. Werncke, Sebastian Wachsmann-Hogiu, V. A. Orlovich

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Stimulated Raman scattering (SRS) excited by picosecond pulses (3.5-4 ps) of a synchronously pumped dye laser has been studied in compressed methane, hydrogen and their mixture. Physical energetic SRS-efficiencies (corrected for the linear losses of the optical elements) up to about 55-60% and 35-37% for the generation of the first vibrational Stokes radiation were reached in methane at a pressure of 60 bar and at excitation wavelengths near 600 nm and 740 nm, respectively. SRS-efficiencies versus pump pulse energy, pressure of gas and temporal duration of laser pulses were studied at 600 nm in methane. A very rich spectrum of Raman lines (including some vibrational, vibrational-rotational and combination Raman lines) was observed in the mixture of methane (35 bar) and hydrogen (25 bar). The energy efficiency of SRS-conversion to the 1-st rotational Stokes Raman line of hydrogen reached about 20% in the mixture. In contrast, the 1-st vibrational Stokes components of hydrogen and methane were substantially suppressed in this mixture. Our measurements demonstrate that methane is one of the most suitable Raman media for obtaining effective SRS-generation especially at pico- and femtosecond excitation because of its suitable parameters controlling the SRS-process and that the mixtures of compressed gases are rather promising Raman media for extending the tuning range of pico- and femtosecond laser systems and for optimizing the efficiencies of SRS-conversion to the different Raman components.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsA.A. Andreev, V.E. Yashin
Pages52-58
Number of pages7
Volume4352
DOIs
StatePublished - 2001
Externally publishedYes
EventUltrafast Optics and Superstrong Laser Fields - St. Petersburg, Russian Federation
Duration: Jun 26 2000Jun 30 2000

Other

OtherUltrafast Optics and Superstrong Laser Fields
CountryRussian Federation
CitySt. Petersburg
Period6/26/006/30/00

Keywords

  • Combination line
  • Compressed gas
  • Efficiency
  • Gas mixture
  • Hydrogen
  • Methane
  • Picosecond laser pulse
  • Raman line
  • Stimulated Raman scattering

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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  • Cite this

    Vodchits, A. I., Werncke, W., Wachsmann-Hogiu, S., & Orlovich, V. A. (2001). Stimulated Raman scattering in compressed gases by short laser pulses. In A. A. Andreev, & V. E. Yashin (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4352, pp. 52-58) https://doi.org/10.1117/12.418810