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Author Gaul, E. W. ♦ Le Blanc, S. P. ♦ Rundquist, A. R. ♦ Zgadzaj, R. ♦ Langhoff, H. ♦ Downer, M. C.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ DIMENSIONS ♦ HELIUM ♦ IMPURITIES ♦ INTERFEROMETRY ♦ LASERS ♦ PHYSICS ♦ PLASMA ♦ PRODUCTION
Abstract We report guiding of intense (I=1.3{+-}0.7x10{sup 17}W/cm{sup 2}) 80 fs laser pulses with negligible spectral distortion through 1.5-cm-long preformed helium plasma channels. Channels were formed by axicon-focused laser pulses of either 0.3 J energy, 100 ps duration, after preionizing a 200--700 Torr backfill of He gas to n{sub e}{approx}10{sup 16}cm{sup -3} with a pulsed electrical discharge; or 0.6--1.1 J energy, 400 ps duration, which required neither preionization nor intentional impurities for seeding. Transverse interferometry showed that He was fully ionized on the channel axis in both cases. Identical femtosecond pulses suffered substantial ionization-induced blueshifts after propagating through Ar and Ne channels of similar dimensions.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2000-12-18
Publisher Place United States
Journal Applied Physics Letters
Volume Number 77
Issue Number 25


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