Asymptotic evaluation of the normalised cut-off frequencies of an optical waveguide with quadratic index variation

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Asymptotic evaluation of the normalised cut-off frequencies of an optical waveguide with quadratic index variation

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© The Institution of Electrical Engineers
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Asymptotic expressions for normalised cut-off frequencies of modes having large meridional order n and small azimuthal order m are obtained for an inhomogeneous waveguide having quadratic index variation. A fractional integral technique is used to construct solutions directly from the differential equation in the form of an integral representation, which is expanded by the steepest-descent procedure.

Inspec keywords: optical waveguide theory

Other keywords: asymptotic evaluation; optical waveguide; large meridional order; normalised cut off frequency; quadratic index variation

Subjects: Waveguide and cavity theory; Optical waveguides; Optical waveguides and couplers

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An Erratum has been published for this content:
Erratum: Asymptotic evaluation of the normalised cut-off frequencies of an optical waveguide with quadratic index variation