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Fibre loss increase due to hydrogen generated at high temperatures

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4 Author(s)
Murakami, Y. ; NTT Ibaraki Electrical Communication Laboratory, Tokai, Japan ; Noguchi, K. ; Ishihara, K. ; Negishi, Y.

The loss changes at 1.39 and 1.88 ¿m are measured for various nylon-jacketed fibres at a high temperature of 200°C. The loss increase at 1.39 ¿m is due to the Si-OH-bond formation, and that at 1.88 ¿m is caused by the absorption of hydrogen molecules in the silica glass. It is found that the loss increase due to the OH-bond formation is in proportion to the time-integrated concentration of the generated hydrogen molecules.

Published in:

Electronics Letters  (Volume:20 ,  Issue: 6 )