A study of phosphorus in optical fiber glasses with (31)P nuclear magnetic resonance spectroscopy.
01 January 1985
The fabrication of optical fibers with the MCVD process is improved by incorporating small amounts of phosphorus into the silica lattice. The primary effect of this addition is a lower viscosity for the doped material relative to the outer quartz tube. This permits processing at lower temperatures during collapse of the preform and drawing of the fiber. In this study, (31)P Nuclear Magnetic Resonance (NMR) spectra of preform samples have been analyzed to determine the phosphorus concentration, chemical bonding and spatial distribution.