Evaluation apparatus for an optical fiber transmission line

This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 11-197659, filed Jul. 12, 1999, the entire contents of which are incorporated herein by reference. An optical time domain reflectometer receives a return light of an optical pulse inciden...

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Bibliographic Details
Main Authors Nakayama, Norio, Oshimi, Takashi, Hori, Shigeo, Tamakoshi, Masaaki
Format Patent
LanguageEnglish
Published 03.09.2002
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Summary:This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 11-197659, filed Jul. 12, 1999, the entire contents of which are incorporated herein by reference. An optical time domain reflectometer receives a return light of an optical pulse incident on a measurement target optical fiber formed out of a plurality of optical fibers coupled in series, and measures the splice loss, return loss and unit length loss of the measurement target optical fiber. A maximum value detector detects a maximum value due to an absolute value for the splice loss and maximum values for the return loss and the unit length loss of the measurement target optical fiber, respectively, in response to the return light. A display unit displays the maximum value due to the absolute value for the splice loss and the maximum values for the return loss and the unit length loss according to items of the splice loss, the return loss and the unit length loss based on output from the maximum value detector.