Abstract
Fluorine is an attractive dopant for silica based optical fibers because it reduces the refractive index of silica glass without any additional loss as opposed to a boron dopant.1 A typical example of the fluorine-doped fiber Is a depressed cladding single-mode fiber. The fiber was fabricated by a direct flame hydrolysis of SiCl4 in the presence of fluorine containing dopant in the VAD method. The maximum depression of the refractive index [Δn(F)] was −0.22%.2
© 1984 Optical Society of America
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