Impact of adverse cable handling on lifetime of optical fiber

Optical fiber experiences various stresses during its lifetime starting from proof-testing, cabling, installation and in-service life. For long term reliability prediction, it is required to determine in-service lifetime and in-service failure rate for various fiber stress histories like constant tension in buried cable or sudden jerk during cable installation, and adverse cable handling like accidental cable "dig-ups". However, a fiber length that is subjected to a constant applied service stress which doesn't vary with time, is the most common situation for which reliability prediction is made. Thus, there is a need to understand impact on lifetime of fibers exposed to abnormal stress-time profiles such as in cable "dig-ups". In this paper various fiber lifetime prediction models are discussed. Fiber lifetime and safe stress are predicted based on stress-time histories and long length (20 m) tensile strength distributions. A set of experiments that can validate the lifetime models, are conducted on fiber with pre-defined testable stress-time exposures. Once validated, these models are used to provide predictions of fiber lifetime of cables exposed to abnormal stress -time profiles.

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Sudipta Bhaumik

Sudipta Bhaumik is an Associate General Manager – Application Engineering in Sterlite Technologies Limited and located at Sterlite’s Center of Excellence, Aurangabad, India. He joined Sterlite in 1998 as process development engineer in Optical Fiber Plant. He holds a B.Tech degree in ceramic technology from Calcutta University, India and M.Tech degree in ceramic technology from IIT-BHU. He has been engaged with research on quality, reliability and applications related issues of optical fiber and fiber optics cable and worked in various functions in optical fiber and cable manufacturing like Quality Assurance, Quality Control, Reliability Engineering, Process Engineering, Management Systems, Business Development and Application Engineering. He is American Society for Quality (ASQ) certified Six-Sigma Black Belt, Manager of Quality/ Business Excellence and Quality Auditor and IRCA approved Lead Auditor of Business Continuity Management System. He serves as a member of panel of examiners for national award on business/ manufacturing excellence. He is an expert member of IEC, ITU-T and BIS technical committees and actively participating in developing national and international Telecom standards. He has been representing India in IEC meetings. A frequent author of technical papers, white papers and application notes, he twice won the Urbain J.H.Malo award (by Wire Association International, USA) for most meritorious technical paper.

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