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A new approach to investigating mode coupling phenomena in graded-index optical fibres

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Abstract

To study mode coupling in optical fibres a new technique is developed, based on mode selective excitation and output near-field analysis. Experimental results support decoupling of the problem into two phenomena which are effective on different scales of propagation length: azimuthal and longitudinal mode mixing. A statistical model providing a simulation of the experimental near-field patterns is developed. Comparison with measurements shows that azimuthal mixing is complete before 1 km propagation, while effects of uncomplete axial coupling are accounted for. This approach also suggests a method for measuring the steady-state distribution length, with useful system implications.

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Authors and Affiliations

  1. CSELT, Via G. Reiss Romoli 274, 10148, Torino, Italy

    M. Calzavara, R. Caponi, F. Cisternino & G. Coppa

Authors
  1. M. Calzavara
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  2. R. Caponi
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  3. F. Cisternino
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  4. G. Coppa
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Calzavara, M., Caponi, R., Cisternino, F. et al. A new approach to investigating mode coupling phenomena in graded-index optical fibres. Opt Quant Electron 17, 157–167 (1985). https://doi.org/10.1007/BF00620358

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  • DOI: https://doi.org/10.1007/BF00620358

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