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- W2019968353 abstract "Single-mode optical fibres are characterised by the moments Ωm of their refractive-index profiles. An accurate description of light propagation along such fibres is obtained when the complete profile details are replaced by the reduced profile data in the form of Ω0, Ω2 and Ω4. The average or effective waveguide parameter Ṽ, which incorporates Ω0, emerges naturally and universal formulas are given in terms of Ṽ, Ω2 = Ω2/Ω0 and Ω4 = Ω4/Ω0. These formulas cover the fundamental-mode eigenvalue, group velocity and dispersion parameters, field spot size and fraction of power propagating within the core, and the cutoff parameter for the second waveguide mode. They are simple to apply and their good accuracy, which is demonstrated for a wide variety of examples, indicates that they are suitable for use in fibre design studies. The formulas also naturally lead to a qualitative description ofwaveguide behaviour: different fibres have similar properties when these are considered as functions of Ṽ, and a residual magnitude scaling can be attributed to profile shape which enters principally through Ω2." @default.
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- W2019968353 date "1982-06-01" @default.
- W2019968353 modified "2023-09-28" @default.
- W2019968353 title "Theory of the profile-moments description of single-mode fibres" @default.
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- W2019968353 doi "https://doi.org/10.1049/ip-h-1:19820027" @default.
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