Improving the accuracy of normalized pro
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V.A. Popescu
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Article
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2004
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Elsevier Science
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English
β 173 KB
The variational principle and higher-order variational method based on Airy functions are applied to the determination of the propagation constants in a planar optical waveguide. We obtain closer results to the exact values even for single-mode waveguides and close to and at the turning points.