Thermal and Photo-Initiated Reactions of H₂ with Germanosilicate Optical Fibers
Raman spectroscopy was performed on the cores of germanosilicate optical fibers into which molecular hydrogen was diffused and subsequently treated with either heat or low-intensity ultraviolet light at 254 nm. The results indicate that distinctly different hydrogen addition reactions occur in these two cases. Thermally initiated reactions resulted in GeH and SiOH production. Ultraviolet-light-initiated reactions produced species characteristic of a local reaction occurring at the oxygen deficient ‘GeO’ defect. In this latter case, the reaction product was determined to be GeH2, with the notable absence of both SiOH and GeOH.
© 1994 Elsevier
“Thermal and photo-initiated reactions of H 2 with germanosilicate optical fibers,” B. I. Greene, D. M. Krol, S. G. Kosinski, P. J. Lemaire, and P. N. Saeta, J. Non-Cryst. Solids 168, 195 (1994). doi: 10.1016/0022-3093(94)90136-8