Method of measuring wavelength dispersion amount and optical...

Details Method of measuring wavelength dispersion amount and optical... Method of measuring wavelength dispersion amount and optical...

2005-03-08

2005-03-08

Nguyen, Tu T. (Department: 2877)

Optics: measuring and testing

For optical fiber or waveguide inspection

Reexamination Certificate

active

06864968

ABSTRACT:
Measuring a wavelength dispersion amount of an optical transmission line without disconnecting the optical transmission line. A measuring signal is transmitted together with a main signal from a first node while the optical transmission line is in operation. The measuring signal is extracted and returned at an opposing node. A delay time required for the measuring signal to return is measured. A length of optical transmission line between the nodes is calculated from the measured delay time. A wavelength dispersion amount of the optical transmission line is calculated based on the calculated length.

REFERENCES:
patent: 4767207 (1988-08-01), Takiguchi
patent: 4799790 (1989-01-01), Tsukamoto et al.
patent: 6266170 (2001-07-01), Fee
patent: 6342945 (2002-01-01), Allen et al.

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