Numerical aperture of optical fibers based on high-purity As2S3 glass: Unsteady-state modal distribution |
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| Authors: | A A Pushkin G E Snopatin I E Fadin M F Churbanov V G Plotnichenko |
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| Affiliation: | (1) Institute of High-Purity Substances, Russian Academy of Sciences, ul. Tropinina 49, 603600 Nizhni Novgorod, Russia;(2) Research Center for Fiber Optics, Institute of General Physics, Russian Academy of Sciences, ul. Vavilova 38, 117756 Moscow, Russia |
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| Abstract: | The numerical aperture of core-clad multimode optical fibers with the core made from high-purity As2S3 glass is measured by a far-field technique using a cw CO laser (5.3-6.3 μm). The lengths at which a steady-state modal distribution
is reached are determined for optical fibers with metallic coatings, tetrafluoroethylene/difluoroethylene copolymer coatings,
or immersion. Various factors affecting the numerical aperture of fibers with an unsteady-state modal distribution are examined. |
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