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30 January 1990 Double- And Triple-Clad Fibers With Low Loss And Dispersion
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Proceedings Volume 1085, Optical Fibres and Their Applications V; (1990)
Event: Optical Fibers and Their Applications V, 1989, Warsaw, Poland
Single mode fibers with an inner cladding of depressed index can be designed to have low absorption, scattering and splicing loss. Dual-shape core fibers with a depressed-index inner cladding maintain these desirable features and in addition can be insensitive with respect to macro- and microbending while allowing wider tolerances for critical design parameters. triple-clad fibers can be produced economically with an inner cladding of only a few MCVD layers and a one-layer intermediate cladding of depressed index which prevents outer cladding loss to add to the transmission loss and, despite a large mode size for low splicing loss, renders this fiber insensitive with respect to micro- and macrobending. Such triple-clad fibers can also be designed to have zeroes of the dispersion coefficient at two or even three wavelengths. The core-index for these dispersion-flattened fibers is only 0.25% larger and the index of the intermediate cladding only 0.2% smaller than the index of the inner and outer cladding. The core radius needs to stay only within ±2.5% and the core index difference only within ±5% of the design values, for the dispersion coefficient to deviate less than 3.5 ps/(nm km) from its flattened characteristic.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hans-Georg Unger and Risheng Yang "Double- And Triple-Clad Fibers With Low Loss And Dispersion", Proc. SPIE 1085, Optical Fibres and Their Applications V, (30 January 1990);

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