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http://dx.doi.org/10.7840/KICS.2012.37B.5.365

Measurement of Time Delay in Optical Fiber Line Using Rayleigh Scattering  

Kwon, Hyung-Woo ((주)유식스)
Yu, Il (동의대학교 물리학과)
Yu, Yun-Sik (부산IT융합부품연구소)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37, no.5B, 2012 , pp. 365-369 More about this Journal
Abstract
It is very important to control synchronization by inter-network delay compensation in high speed synchronous optcial transmission network systems. In this study we designed a delay measurement system based on OTDR using Rayleigh backscatterer in order to compensate for time delay due to the length of optical fiber line. We observed waveform variations on both averaging time and peak power of laser pulse. Finally, we executed experimental demonstration on its accuracy and test repeatability by comparison to the methods practically used in the industry. Experimental results show maximum error of 0.06usec and standard deviation of 0.021usec, which means it's possibly applied to delay control system for mobile repeaters and stations.
Keywords
optical fiber delay; optical time delay; optical latency; OTDR; delay equalizer;
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  • Reference
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