Chromatic dispersion measurement and compensation

Optics: measuring and testing – For optical fiber or waveguide inspection

Reexamination Certificate

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Reexamination Certificate

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07064814

ABSTRACT:
The invention proposes a technique for measuring chromatic dispersion in an optical communication line transmitting an optical signal at a predetermined optical wavelength. The technique comprises determining the sign of chromatic dispersion and includes introducing controlled changes of wavelength around the predetermined wavelength, monitoring the optical signal that has passed said line, and obtaining a first and a second signals, wherein the first signal reflects changes of the carrier wavelength, and the second signal reflects changes of delay of the optical signal transmitted via the line. The two signals are compared and the chromatic dispersion sign is determined based on the phase difference there-between.

REFERENCES:
patent: 5406368 (1995-04-01), Horiuchi et al.
patent: 5815294 (1998-09-01), Ishikawa et al.
patent: 6252692 (2001-06-01), Roberts
patent: 6614513 (2003-09-01), Hoyer
patent: 2002/0122171 (2002-09-01), Aoki et al.
patent: 20002 35170 (2000-08-01), None

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