8 November 1983 Problems In The Use Of ESI Parameters In Specifying Monomode Fibres
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Abstract
A numerical study has been made into the accuracy of the equivalent step-index (ESI) description of monomode fibres. It is primarily concerned with the measurement of ESI parameters without knowledge of the refractive index profile, rather than the theoretical generation of the best parameters when both the field and profile are known. It is then found that the ESI parameters afford an adequate description of mode cut-off but can give rise to significant errors in dispersion (for dispersion shifted fibres) and for the mode field width. Contrary to popular belief, it is shown that the Gaussian approximation leads to significant errors.
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B. P. Nelson, B. P. Nelson, J. V. Wright, J. V. Wright, } "Problems In The Use Of ESI Parameters In Specifying Monomode Fibres", Proc. SPIE 0425, Single Mode Optical Fibers, (8 November 1983); doi: 10.1117/12.936207; https://doi.org/10.1117/12.936207
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