Modal decomposition of self-focusing effects in optical fibres
Modal decomposition of self-focusing effects in optical fibres
When an intense beam with a transverse intensity gradient propagates in a medium with positive Kerr nonlinearity n2, the induced refractive index profile actuates a lens, focusing the beam itself. For input powers above a critical threshold, P > Pcrit, self-focusing can subjugate beam divergence, resulting in catastrophic collapse and material failure [1]. For P < Pcrit diffraction deflects energy from the focal point, and in a fibre, divergence is reflected at the core/cladding boundary instigating a periodic transverse beam profile.
Hesketh, Graham
4516efe6-55a9-4055-8ba2-c8f6aa3fd267
Poletti, Francesco
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Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Hesketh, Graham
4516efe6-55a9-4055-8ba2-c8f6aa3fd267
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Hesketh, Graham, Poletti, Francesco and Horak, Peter
(2011)
Modal decomposition of self-focusing effects in optical fibres.
European Conference on Lasers and Electro-Optics, , Munich, Germany.
22 - 26 May 2011.
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Conference or Workshop Item
(Paper)
Abstract
When an intense beam with a transverse intensity gradient propagates in a medium with positive Kerr nonlinearity n2, the induced refractive index profile actuates a lens, focusing the beam itself. For input powers above a critical threshold, P > Pcrit, self-focusing can subjugate beam divergence, resulting in catastrophic collapse and material failure [1]. For P < Pcrit diffraction deflects energy from the focal point, and in a fibre, divergence is reflected at the core/cladding boundary instigating a periodic transverse beam profile.
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e-pub ahead of print date: 2011
Venue - Dates:
European Conference on Lasers and Electro-Optics, , Munich, Germany, 2011-05-22 - 2011-05-26
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 341459
URI: http://eprints.soton.ac.uk/id/eprint/341459
PURE UUID: 8277d162-a71f-4957-a9f6-e16229713649
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Date deposited: 25 Jul 2012 11:36
Last modified: 15 Mar 2024 03:28
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Author:
Graham Hesketh
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