Filter processing system for the output signal of optical...

Details Filter processing system for the output signal of optical... Filter processing system for the output signal of optical...

2005-04-19

2005-04-19

Nguyen, Tu T. (Department: 2877)

Optics: measuring and testing

For optical fiber or waveguide inspection

Reexamination Certificate

active

06882410

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.

REFERENCES:
patent: 5956131 (1999-09-01), Mamyshev et al.
patent: 6320687 (2001-11-01), Ishikawa
patent: 0 819 926 (1998-01-01), None
patent: 10-083006 (1998-03-01), None

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