Anomalous dispersion of new doubly clad optical fibre |
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| Authors: | Kawakami S Nishida S |
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| Affiliation: | Tohoku University, Research Institute of Electrical Communication, Sendai, Japan; |
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| Abstract: | The letter treats a doubly clad dielectric optical fibre. We assume that the core refractive index is greater than the outer-cladding refractive index, which is greater than the inner-cladding refractive index. This optical fibre, if properly designed, has an anomalous or negative normalised guide dispersion (?2/?)d2 ?/d?2 that compensates typical glass dispersion. Single-mode operation of this doubly clad fibre can be obtained with the core radius appreciably larger than that of a singly clad fibre with the same core and outer-cladding refractive indices. |
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