Optics: measuring and testing – For optical fiber or waveguide inspection
Patent
1994-03-17
1996-09-03
McGraw, Vincent P.
Optics: measuring and testing
For optical fiber or waveguide inspection
G01N 2188
Patent
active
055528813
ABSTRACT:
In a method and apparatus for scanning a fiber optic network, a light source emits optical pulses into an optical fiber under test. A detector detects reflected light for each of the optical pulses and converts the reflected light into an electrical signal for each of the optical pulses. A sampling circuit samples the electrical signal for each of the optical pulses to generate sets of sample data points associated with the respective optical pulses. A signal processor is programmed to ensemble average the sets of sample points with each other to generate a merged set of avenge sample points. The signal processor then compresses the merged set of average sample data points to obtain a current set of trace data points. The data compression is preferably accomplished using "boxcar" time-avenging of the sample points. The current set of trace data points is compared with a reference set of trace data points stored in memory to determine whether or not a fault exists in the fiber under test.
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Advertisement for Computer Product, publicly available prior to Mar. 17, 1993 (see accompanying Description of Advertisement for Computer Product).
Jezwinski Scott D.
Schy Jeffrey H.
Weir Alan T.
McGraw Vincent P.
Teradyne, Inc.
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