Filter processing system for the output signal of optical time domain reflectometer in the chromatic dispersion distribution measurement apparatus
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United States of America Patent
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Apr 19, 2005
Grant Date -
Dec 25, 2003
app pub date -
Jan 16, 2003
filing date -
Jan 31, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A filter processing system making it possible to be able to set a frequency pass-band automatically and to provide the optimum filter to an input signal. A filter processing method of an output signal of an Optical Time Domain Reflectometer (OTDR) in a chromatic dispersion distribution measuring apparatus is disclosed. The filter processing method includes establishing measuring-condition parameters, generating an ideal signal waveform based on previously established chromatic dispersion values and the measuring-condition parameters, and providing correlation results between the ideal signal waveform and a filter input signal. The method also includes comparing the correlation results to a threshold value to generate a minimum chromatic dispersion value and a maximum chromatic dispersion value, and performing filter processing for the output of the OTDR based on the minimum chromatic dispersion value and the maximum chromatic dispersion value.
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