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Fabrication of a large preform for a 40-km length of fiber using the CVD method

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Abstract

The modified CVD process is widely used for the fabrication of high-quality optical fiber. To lower the manufacturing cost of fiber, it is necessary to improve the deposition rate for preparing larger preforms in less time and minimize the deposition core taper at the start of the preform. Realizing these requirements, we have fabricated a large preform, 70 cm long with 12.5-mm core diameter. Total time for core and cladding deposition was 5 h, and the deposition rate was 1.3 g/min.

© 1981 Optical Society of America

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