Detection of faults in short fiber by the phase compensated reflectometer

Author

Hangai, Seiichiro ; Taki, Yasuo

Author_Institution

Fac. of Eng. Sci., Tokyo Univ., Japan

fYear

1989

fDate

25-27 Apr 1989

Firstpage

303

Lastpage

306

Abstract

A phase-compensated reflectometer designed for removing step error in frequency-domain reflectometry is applied to detect Fresnel reflection points in a short fiber (from 0.5 m to 2 km). This reflectometer makes it possible to distinguish multiple close reflections from one another. In addition, the signal/noise ratio is easily improved by narrowing the effective bandwidth of the receiver. By widening the swept bandwidth of the reflectometer, it is found that a break point in the graded-index fiber (125/150) and a joint close to it are distinguished clearly with ±0.025 m accuracy and 0.25-m spatial resolution

Keywords

fault location; gradient index optics; optical fibres; optical testing; reflectometers; 0.5 m to 2 km; Fresnel reflection points; break point; fault detection; frequency-domain reflectometry; graded-index fiber; multiple close reflections; optical testing; phase compensated reflectometer; short fiber; signal/noise ratio; step error; Band pass filters; Bandwidth; Fault detection; Frequency; Optical fiber communication; Optical fibers; Optical receivers; Phase detection; Reflectometry; Spatial resolution;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1989. IMTC-89. Conference Record., 6th IEEE

Conference_Location

Washington, DC

Type

conf

DOI

10.1109/IMTC.1989.36875

Filename

36875