Abstract
The methods of geometric optics are applied to light acceptance and propagation in graded index fibres. The symmetry of the basic ray equations reveals ray path invariants. Rays are classified into bound, tunnelling and refracting rays. The role of source properties in exciting different ray types is analysed. Pulses are considered in terms of absolute widths, r.m.s. widths and complete shape detail. Optimization formulae are obtained. The incorporation of attenuation mechanisms is described and the effects of an absorbing core are analysed in detail.
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Ankiewicz, A., Pask, C. Geometric optics approach to light acceptance and propagation in graded index fibres. Opt Quant Electron 9, 87–109 (1977). https://doi.org/10.1007/BF00619890
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DOI: https://doi.org/10.1007/BF00619890