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Title: High efficiency coupling and guiding of intense femtosecond laser pulses in preformed plasma channels in an elongated gas jet

Abstract

We report coupling and guiding of pulses of peak power up to 0.3 TW in 1.5 cm long preformed plasma waveguides generated in a high repetition rate argon gas jet. Coupling of up to 52% was measured for 50 mJ, -110 fs pulses injected at times longer than 20 ns, giving guided intensities up to -5x10{sup 16} W/cm{sup 2}. It was found that for short delays between waveguide generation and pulse injection, pulse shortening occurred, with this effect reduced as delay was increased. Injection into the waveguide of two consecutive pulses separated by a few nanoseconds resulted in the reduction of shortening of the second pulse at all delays. Femtosecond time-resolved shadowgrams of the coupling of injected pulses into the waveguide show that there is {approx}0.5 mm of neutral gas remaining at the waveguide entrance after waveguide generation.

Authors:
; ; ;  [1]
  1. Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742 (United States)
Publication Date:
OSTI Identifier:
21205386
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 472; Journal Issue: 1; Conference: 8. workshop on advanced accelerator concepts, Baltimore, MD (United States), 6-11 Jul 1998; Other Information: DOI: 10.1063/1.58910; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ARGON; BEAM-PLASMA SYSTEMS; EFFICIENCY; OPTICAL SYSTEMS; PHOTON BEAMS; PLASMA; PLASMA ACCELERATION; PLASMA JETS; PULSES; TIME RESOLUTION; WAVEGUIDES

Citation Formats

Nikitin, S P, Alexeev, I, Fan, J, and Milchberg, H M. High efficiency coupling and guiding of intense femtosecond laser pulses in preformed plasma channels in an elongated gas jet. United States: N. p., 1999. Web. doi:10.1063/1.58910.
Nikitin, S P, Alexeev, I, Fan, J, & Milchberg, H M. High efficiency coupling and guiding of intense femtosecond laser pulses in preformed plasma channels in an elongated gas jet. United States. doi:10.1063/1.58910.
Nikitin, S P, Alexeev, I, Fan, J, and Milchberg, H M. Mon . "High efficiency coupling and guiding of intense femtosecond laser pulses in preformed plasma channels in an elongated gas jet". United States. doi:10.1063/1.58910.
@article{osti_21205386,
title = {High efficiency coupling and guiding of intense femtosecond laser pulses in preformed plasma channels in an elongated gas jet},
author = {Nikitin, S P and Alexeev, I and Fan, J and Milchberg, H M},
abstractNote = {We report coupling and guiding of pulses of peak power up to 0.3 TW in 1.5 cm long preformed plasma waveguides generated in a high repetition rate argon gas jet. Coupling of up to 52% was measured for 50 mJ, -110 fs pulses injected at times longer than 20 ns, giving guided intensities up to -5x10{sup 16} W/cm{sup 2}. It was found that for short delays between waveguide generation and pulse injection, pulse shortening occurred, with this effect reduced as delay was increased. Injection into the waveguide of two consecutive pulses separated by a few nanoseconds resulted in the reduction of shortening of the second pulse at all delays. Femtosecond time-resolved shadowgrams of the coupling of injected pulses into the waveguide show that there is {approx}0.5 mm of neutral gas remaining at the waveguide entrance after waveguide generation.},
doi = {10.1063/1.58910},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 472,
place = {United States},
year = {1999},
month = {7}
}