Simulations of spectral broadening by cross-phase modulation (XPM) with chaotic light pulses

M. A. Henesian, S. N. Dixit, C. J. Chen, P. K.A. Wai, C. R. Menyuk

Research output: Journal article publicationConference articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Spectral broadening of single-frequency laser pulses by optical cross-phase modulation (XPM) with chaotic laser pulses in birefringent single-mode optical fibers is investigated numerically and results are compared with experiments. By this process we have generated laser pulses of variable bandwidth (1-25 Å) at the fundamental wavelength (1053 nm) for amplification in high power solid-state Nd:glass lasers used for inertial confinement fusion research. Simulations indicate that a temporally smooth XPM pulse can be generated with intensity fluctuations of less than 10% and spectral width greater than 50 Å using a short length (∼5 m) of special low dispersion and low birefringence fiber, e.g. D = 10 ps/nm-km (normal dispersion) and Δn = 2 × 10-5. Readily available fibers of similar length, with parameters of D = 40 ps/nm-km and Δn = 6 × 10-5, can give spectral widths exceeding 25 Å, but the noise will range from 25 to 60%. Broadband laser pulses generated by XPM are now routinely used at Lawrence Livermore National Laboratory for active smoothing of the laser irradiance on targets by the technique of smoothing-by-spectral dispersion.

Original languageEnglish
Pages (from-to)2-13
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume1870
DOIs
Publication statusPublished - 1 May 1993
Externally publishedYes
EventLaser Coherence Control: Technology and Applications 1993 - Los Angeles, United States
Duration: 17 Jan 199322 Jan 1993

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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