Energy shedding during nonlinear self-focusing of optical beams
Travis, C. and Norris, G. and McConnell, G. and Oppo, G.-L. (2013) Energy shedding during nonlinear self-focusing of optical beams. Optics Express, 21 (20). pp. 23459-23470. ISSN 1094-4087 (https://doi.org/10.1364/OE.21.023459)
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Abstract
Self-focusing of intense laser beams and pulses of light in real nonlinear media is in general accompanied by material losses that require corrections to the conservative Nonlinear Schrödinger equations describing their propagation. Here we examine loss mechanisms that exist even in lossless media and are caused by shedding of energy away from the self-trapping beam making it to relax to an exact solution of lower energy. Using the conservative NLS equations with absorbing boundary conditions we show that energy shedding not only occurs during the initial reshaping process but also during oscillatory propagation induced by saturation of the nonlinear effect. For pulsed input we also show that, depending on the sign and magnitude of dispersion, pulse splitting, energy shedding, collapse or stable self-focusing may result.
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Item type: Article ID code: 45069 Dates: DateEvent7 October 2013Published25 September 2013Published Online16 September 2013AcceptedSubjects: Science > Physics > Optics. Light Department: Faculty of Science > Physics
Faculty of Science > Strathclyde Institute of Pharmacy and Biomedical SciencesDepositing user: Pure Administrator Date deposited: 07 Oct 2013 09:00 Last modified: 29 Jun 2024 01:27 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/45069