Ultraviolet absorption in modified chemical vapor deposition preforms

Dong, L., Pinkstone, J., Russell, P.St.J. and Payne, D.N. (1994) Ultraviolet absorption in modified chemical vapor deposition preforms Journal of the Optical Society of America B, 11, (10), pp. 2106-2111. (doi:10.1364/JOSAA.11.002106).


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Using a simple and effective technique, we have systematically studied the UV absorption in a number of fiber preforms made by modified chemical vapor deposition. The 242-nm absorption band due to germanium-related oxygen-deficient centers (GODC's) is found to be approximately linearly dependent on germania concentration and, for a small initial increase, is almost constant throughout the preform collapse process. However, we found that the band can be increased by 700% when a reducing atmosphere (He + 1%D2) is substituted for O2. Several codopants have been evaluated to determine their effect on the GODC concentration. Phosphorus, boron, aluminum, and fluorine all reduce the 242-nm band; phosphorus causes the largest change.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1364/JOSAA.11.002106
ISSNs: 0740-3224 (print)
Related URLs:
ePrint ID: 78213
Date :
Date Event
Date Deposited: 11 Mar 2010
Last Modified: 18 Apr 2017 20:23
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/78213

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