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Performance Characteristics of VAD Single Mode Fibers in Mass Production Basis,
SUMITOMO ELECTRIC INDUSTRIES LTD YOKOHAMA (JAPAN)
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The results of investigations on the VAD single mode fibers, fabricated in mass production basis, are presented. In performance characteristics of the VAD single mode fibers operated at 1.3 micron, the low transmission loss could be achieved by improvements on the VAD process and dehydration process. The median and minimum of the transmission losses of the single mode fibers were 0.42 dBkm and 0.32dBkm at 1.3 micron, respectively. Satisfactory properties were also obtained for the other characteristics, cut-off wavelength, spot size, dispersion, and fiber geometrical parameters. These results are chiefly attributed to the successful developments of the high reproducibility of the VAD preforms with a sufficient longitudinal uniformity. The length dependences on transmission characteristics of long-spliced single mode fibers are also discussed, and the additive properties of transmission loss and dispersion are confirmed. Author
APPROVED FOR PUBLIC RELEASE