Optics: measuring and testing – For optical fiber or waveguide inspection
Reexamination Certificate
2007-08-14
2007-08-14
Nguyen, Tu T. (Department: 2886)
Optics: measuring and testing
For optical fiber or waveguide inspection
Reexamination Certificate
active
11340880
ABSTRACT:
A system and method for optimizing dispersion in an optical transmission line is provided. The system and method comprise measuring the amplitude of a d.c. voltage component of a synchronously demodulated data signal of at least one wavelength channel by an in-phase carrier at the baud frequency of the wavelength channel. In an alternative embodiment, the system and method comprise measuring the IF amplitude of the resulting a.c. signal of a data signal of the at least one wavelength channel comprising a received RZ signal mixed with a local oscillator, whose frequency differs from the wavelength channel baud by a relatively small amount, somewhere on the order of about 100 kHz.
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European Search Report issued on Jan. 24, 2006 corresponding to European Patent Appln. No. 03256219.1 (3 pgs).
Cai Yi
Cordell Robert R.
Davidson Carl R.
Zhang Hongbin
Grossman Tucker Perreault & Pfleger PLLC
Nguyen Tu T.
Tyco Telecommunications (US) Inc.
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