| 摘要 |
<p>A method for incorporating a metal dopant in the doped silica core of an optical fiber preform, the dopant precursor compound being a metal chelate having a sufficiently high vapor pressure whereby the chelate can be volatilized at relatively low temperatures (e.g. 100?o to 250o¿C) and be readily incorporated in the gaseous core precursor compound streams normally used for the deposition of the doped core, the metal chelate being derived from a fluorinated β-diketone ligand having the general formula (I), wherein R, R¿1? and R2 are perfluorinated alkyl groups consisting of 1-7 carbons or perfluorinated aryl groups.</p> |
