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  • CLEO/Europe and EQEC 2011 Conference Digest
  • OSA Technical Digest (CD) (Optica Publishing Group, 2011),
  • paper CJ_P22

Modal Decomposition of Self-Focusing Effects in Optical Fibres

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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.

© 2011 Optical Society of America

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