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Conferences > OAA > 1991 > FE > FE1

OTDR in Optical Amplifier Transmission Systems Using EDFAs Containing Optical Circulators

Yoshiaki Sato, Shigendo Nishi, and Koh-ichi Aoyama

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Abstract

Optical time domain reflectometry (OTDR) is an effective technique for locating breaks and for determining the loss distribution along a fiber [1][2]. However, OTDR can not be used with optical transmission lines containing traditional Er-doped fiber amplifiers (EDFAs) because EDFAs require optical isolators to eliminate signal reflection [3]-[5]. The returning backscattered light generated by the forward traveling probe pulse is blocked by optical isolators in each EDFA.

© 1991 Optical Society of America

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