4.6 Article

Self-focusing collapse distance in ultrashort pulses and measurement of nonlinear index

Journal

OPTICS LETTERS
Volume 36, Issue 13, Pages 2542-2544

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OL.36.002542

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Funding

  1. Air Force Office of Scientific Research (USAFOSR) [FA9550-10-1-0064]

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We analyze the method of moving focus to determine the critical power for self-focusing by means of numerical simulation and a semianalytical model. It is shown that the original interpretation of a moving focus experiment does not hold in general and that inclusion of defocusing effects due to free electrons is necessary to relate the measured data to critical power. (C) 2011 Optical Society of America

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