23 June 1999 Instantaneous and noninstantaneous nonlinear effects in femtosecond pulse propagation
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Abstract
Propagation of intense femtosecond pulses in solids and liquids is investigated experimentally and numerically. A brief review of experiments in fused silica that reveal complicated spatio-temporal dynamics including temporal pulse splitting is presented. Experiments in methanol show the expected effects of linear dispersion and an instantaneous Kerr nonlinearity as well as a contribution from a noninstantaneous nonlinearity with a response time on the order of 10 femtoseconds. Propagation in these two systems is modeled using a modified (3 + 1)-dimensional nonlinear Schroedinger equation (NLSE) that includes nonlinear shock and space-time coupling terms and a (1 + 1)-dimensional NLSE that includes a response time of the nonlinear part of the refractive index.
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Hilary K. Eaton, Scott A. Diddams, Alex A. Zozulya, Amelia G. Van Engen, Tracy Sharp Clement, "Instantaneous and noninstantaneous nonlinear effects in femtosecond pulse propagation", Proc. SPIE 3609, Optical Pulse and Beam Propagation, (23 June 1999); doi: 10.1117/12.351053; https://doi.org/10.1117/12.351053
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