Studies on Deuteration of Fused Silica.
Abstract
THe isotope exchange reactions between hydrogen and deuterium in vitreous silica, microcover gorasilicate and NBS 710 glasses has been investigated. The exchange reaction shifts the hydroxyl absorption bands to longer wavelengths by a factor of approx 1.35. The extinction coefficient of the OD group was determined are 36.7 and 56.3 KJ/mol for hydrogenation and deuteration reactions respectively. The two reactions have been shown to be irreversible which has been explained on the basis of differences in permeability and diffusion of hydrogen and deuterium gases, as well as on the chemical nature of OH and OD groups. The relevance of the irreversible nature of the two reactions in suppressing transmission losses in optical fibers has been discussed. The pressure dependence of the exchange reactions in microcover borosilicate and NBS 710 color centers in the NBS 710 glass is proposed to be related to the formation of FeS.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 17, 1986
- Accession Number
- ADA175649
Entities
People
- Binod Kumar
Organizations
- University of Dayton