Afshar Vahid, S.Monro, T.2009-10-272009-10-272008Proceedings of OECC/ACOFT 2008 Conference : Joint Conference of the Opto-Electronics and Communications Conference and the Australian Conference on Optical Fibre Technology (2008 : Sydney, Australia)9780858258075http://hdl.handle.net/2440/51470We develop a generalized relation for effective nonlinear coefficients of waveguides with arbitrary refractive index profiles. Significant differences between the new definition and usual one are demonstrated in the regime of strong guidance or waveguides with sub-wavelength inclusions.enConference paper002009612510.1109/OECCACOFT.2008.46106170002620795001152-s2.0-5404914821735286