Accession Number : ADA294165

Title :   Extreme Broadening of Stimulated Raman Scattered Light from High Intensity Laser Plasma Interactions.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Ting, A. ; Krushelnick, K. M. ; Burris, H. R. ; Fisher, A. ; Manka, C.

PDF Url : ADA294165

Report Date : 02 MAY 1995

Pagination or Media Count : 15

Abstract : High intensity picosecond laser plasma interaction experiments were performed to examine nonlinear scattering mechanisms in field ionized underdense plasmas. Broad and oscillatory spectra were observed for the forward scattered light. The Raman backscattered spectrum showed an extremely broad, supercontinuum like nature, extending from 450 nm to greater than 1200 nm at incident laser intensities of 2 X 10(exp 18) W/sq cm. Narrow and large amplitude modulations in the spectrum of the backscattered radiation were measured and are attributed to scattering from ion waves.

Descriptors :   *LASER TARGET INTERACTIONS, IONS, LIGHT SCATTERING, STIMULATION(GENERAL), PLASMAS(PHYSICS), BACKSCATTERING, NONLINEAR OPTICS, LIGHT PULSES, HIGH INTENSITY, MODULATION, OSCILLATION, RAMAN SPECTRA, FORWARD SCATTERING, PLASMA WAVES.

Subject Categories : Directed Energy Weapons
      Lasers and Masers
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE