Long-Term Reliability of Plastic Ferrules for Single-Mode Fiber-Optic Connectors

Yoshito SHUTO  Shuichi YANAGI  Masayoshi OHNO  Hirotsugu SATO  Shin SUMIDA  Shunichi TOHNO  

IEICE TRANSACTIONS on Electronics   Vol.E84-C   No.7   pp.1002-1009
Publication Date: 2001/07/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Optoelectronics
optical connector,  injection molding,  ferrule,  liquid crystalline polymer,  

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We examined the creep properties and hazard rates of plastic ferrules to ensure the long-term reliablity of optical fiber connections. The endface deformation ΔL had to be smaller than 3 µm to keep the insertion-loss and return-loss fluctuation to acceptable levels in the worst case of random concatenation of similarly deformed plastic ferrules. From the fluctuation data, we estimated the time-to-failure tf at which the ΔL value became 3 µm. We estimated the acceleration parameters, median lifetimes ξ, and hazard rates λ by using tf values based on Weibull statistics. The ξ values decreased rapidly with increasing temperature and relative humidity. We found we could expect small λ values of < 0.1 FIT (FIT=10-9/hour) and of 1 FIT for 20 years in a normal atmosphere (25C/50%RH) and in a more severe case of 25C/90%RH, respectively.