Accession Number : ADP007084

Title :   Spectral Blueshifts of Femtosecond Pulses in Atmospheric Density Kr and Xe Plasmas,

Corporate Author : TEXAS UNIV AT AUSTIN DEPT OF PHYSICS

Personal Author(s) : Wood, W. M. ; Downer, M. C.

Report Date : 22 MAY 1992

Pagination or Media Count : 3

Abstract : Collisionless multiphoton ionization of atmospheric density gases with intense femtosecond pulses can produce a cold, dense plasma of highly stripped ions, thus providing a promising medium for XUV recombinant lasers. We have shown in several recent papers that rapid ionization and the subsequent development of of plasma temperature in atmospheric density plasmas cause macroscopic refractive index changes which in turn induce characteristic spectral shifts on the ionizing pulse, or a time delayed probing pulse. Theoretical analysis of detailed features of these shifts in the lighter rare gases helium,neon, argon has revealed several key aspects of femtosecond ionization.

Descriptors :   *PHOTOIONIZATION, *COHERENT OPTICAL RADIATION, PHOTONS, PLASMAS(PHYSICS), ULTRAVIOLET LASERS, SHORT WAVELENGTHS, KRYPTON, XENON, REFRACTIVE INDEX, RARE GASES, COHERENT RADIATION, SYMPOSIA.

Subject Categories : Nuclear Physics & Elementary Particle Physics
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE