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Degradation of Stressed Optical Fibers in Water: New Worst‐case Lifetime Estimation Model
Author(s) -
Hasløv Peter,
Jensen Knud Bundgaard,
Skovgaard Niels H.
Publication year - 1994
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1994.tb09753.x
Subject(s) - degradation (telecommunications) , materials science , fiber , stress (linguistics) , optical fiber , composite material , service life , exponent , optics , electronic engineering , linguistics , philosophy , physics , engineering
Simultaneously determined results from zero‐stress aging and static fatigue measurements in water at 65°, 80°, and 95°C have been combined into a worst‐case fiber lifetime model which shows good agreement between predicted and observed failure times. The model shows that the lifetime in a wet environment of the largest crack at normal service strain (0.1%) is nearly identical to the lifetime of the pristine fiber and that the initial strength and the stress corrosion exponent are of minor importance for the lifetime. In a separate experiment, it is shown that degradation in a water‐saturated, jelly‐filled cable is significantly slower than when fibers are directly immersed in water. For a fast‐degrading fiber, evidence of a strength‐increasing mechanism is presented.