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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).

Record type: Article


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.

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Published date: 1994


Local EPrints ID: 78213
ISSN: 0740-3224
PURE UUID: 775e507c-c783-426a-9f10-ad1afcc4591c

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:26

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Author: L. Dong
Author: J. Pinkstone
Author: P.St.J. Russell
Author: D.N. Payne

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