Investigations for phase conjugation by stimulated Brillouin scattering of pulsed high-energy CO2 laser radiation

Ruediger Schmitt; Manfred Hugenschmidt

doi:10.1117/12.145839

1 January 1993 Investigations for phase conjugation by stimulated Brillouin scattering of pulsed high-energy CO₂ laser radiation

Ruediger Schmitt, Manfred Hugenschmidt

Author Affiliations +

Proceedings Volume 1801, 20th International Congress on High Speed Photography and Photonics; (1993) https://doi.org/10.1117/12.145839
Event: 20th International Congress on High Speed Photography and Photonics, 1992, Victoria, BC, Canada

Abstract

The requirements for obtaining phase conjugation due to stimulated Brillouin-scattering of CO₂-laser radiation in high pressure gases have been investigated. The steady state gain factors and the phonon lifetimes for different gases at 10.6 micrometers were calculated. Simply focussing a pulsed TEA-CO₂ laser beam up to power densities near below the gas breakdown threshold proved not to be sufficient for initiating the stimulated Brillouin scattering process. With a special oscillator amplifier setup and feedback system it was possible, however, to overcome these constraints so that for the first time measurements of stimulated CO₂-radiation back-scattering in various gases can be reported.

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Ruediger Schmitt and Manfred Hugenschmidt "Investigations for phase conjugation by stimulated Brillouin scattering of pulsed high-energy CO₂ laser radiation", Proc. SPIE 1801, 20th International Congress on High Speed Photography and Photonics, (1 January 1993); https://doi.org/10.1117/12.145839

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