Perturbation of a LP mode of an optical fibre by a quasi-degenerate field: a simple formula
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- Vassallo, C. Opt Quant Electron (1985) 17: 201. doi:10.1007/BF00620363
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A very simple formula is given for the perturbation of a LPon mode of a circular fibre by a quasidegenerate field. Similar formulae, but less simple, are given for higher LPmn modes in circular fibres or for LP modes of non-circular fibres. Some straightforward applications are given.