Fluorine Sources for Single-Mode Fibers

Akio KAWANA  Tetsuo MIYA  Shinji ARAKI  Yasuro FURUI  

IEICE TRANSACTIONS (1976-1990)   Vol.E65    No.9    pp.529-533
Publication Date: 1982/09/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: PAPER
Category: Optical and Quantum Electronics

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The possibility of using SF6 and CF4 as fluorine sources have been studied utilizing the modified chemical vapor deposition (MCVD) method. It has been found that the refractive index change of fluorine doped silica glasses strongly depends on the source materials and the deposition temperature. A maximum refractive index change of 0.05 has been observed using SF6 as the fluorine source. No excess absorption loss resulting from the use of SF6 in the long wavelength region has been observed in single-mode fibers with fluorine and P2O5 doped silica glass cladding.