Multi-branched optical line testing apparatus

Details Multi-branched optical line testing apparatus Multi-branched optical line testing apparatus

1997-12-08

2000-02-22

Font, Frank G.

Optics: measuring and testing

For optical fiber or waveguide inspection

385 24, G01N 2100

Patent

active

06028661&

ABSTRACT:
A multi-branched optical line testing apparatus can automatically detect a faulty line in multi-branched optical lines and the distance to the fault point. An optical pulse is introduced to the branch point of optical fibers and is reflected inside the respective optical fibers. The waveform of the returning response light is analyzed by an optical time-domain reflectometer (OTDR) measuring apparatus to detect a fault in the respective optical fibers and to determine the fault point. The OTDR measuring apparatus periodically converts the response light which is returned from the respective optical fibers into a digital waveform data group, calculates the attenuation ratios of the respective optical fibers by performing separation analysis of the digital waveform data group, and determines the faulty line and the position of the fault point based on the change of the attenuation ratio of the respective optical fibers.

REFERENCES:
patent: 5028146 (1991-07-01), Wada
patent: 5187362 (1993-02-01), Keeble
patent: 5396569 (1995-03-01), Yanagawa et al.
patent: 5793481 (1998-08-01), Leali

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