Long-term loss stability of single-mode optical fibres exposed to hydrogen

Technical digest Symposium on Optical Fiber Measurements, 1988

“…(Fig. 5) (47,48) The absorption cross section of the defect responsible for this edge is temperature dependent, and thus the magnitude of the excess loss depends on the measurement temperature. (49) This loss edge is often the dominant hydrogen loss mechanism for Ge-doped single mode fibers at typical operating conditions.…”