Chromatic dispersion measurement in a fiber optic cable

Details Chromatic dispersion measurement in a fiber optic cable Chromatic dispersion measurement in a fiber optic cable

1997-06-30

1999-10-19

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2141, G01N 2184

Patent

active

059698063

ABSTRACT:
Chromatic dispersion in an optical cable is measured by applying to the cable a signal that rapidly switches between a wavelength generated by a tunable optical source and a different wavelength generated by a reference source. The two sources are modulated in such a way that a delay line phase detection scheme at the far end of the cable can accurately measure relative delay between the tunable source and the reference source. The chromatic dispersion is determined by measuring the relative delay between the two sources for several different wavelengths of the tunable source.

REFERENCES:
patent: 4984884 (1991-01-01), Ryu et al.

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