Hydrogen Permeation in Optical Fibres with Hermetic Carbon Coatings.
01 January 1988
Hydrogen permeation has been measured for optical fibers with hermetic carbon coatings. Data obtained at elevated temperatures and high hydrogen pressures lead to predictions of extremely low permeation rates at typical operating conditions. In-situ loss measurements have shown the existence of a lag time, during which no hydrogen reaches a fibre's interior.