Fit method to determine the refractive index profile of planar surface waveguides
- 1 September 1995
- journal article
- Published by IOP Publishing in Pure and Applied Optics: Journal of the European Optical Society Part A
- Vol. 4 (5) , 485-493
- https://doi.org/10.1088/0963-9659/4/5/004
Abstract
We present a fit method, based on the WKB approximation, to find the refractive index profile of a planar graded-index waveguide from the evaluation of the positions of the turning points corresponding to each mode of the waveguide. Results are applied to recover numerically a given Gaussian profile and to determine the profile of a fabricated waveguide.Keywords
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