Method of detecting the presence of cross-talk and apparatus...

Details Method of detecting the presence of cross-talk and apparatus... Method of detecting the presence of cross-talk and apparatus...

2008-07-15

2008-07-15

Sedighian, M. R. (Department: 2613)

Optical communications

Interference signal transmission or elimination

C398S033000, C398S159000

Reexamination Certificate

active

10459590

ABSTRACT:
A control loop detects the presence of cross-talk between first, second and third adjacent amplitude modulated wavelength division modulated channels of an optical communications system. A receiver including a demultiplexer, such as an Arrayed Waveguide Grating (AWG), receives portions of the energy in the channels to derive first, second and third electrical signals that are respectively replicas of the modulation of the first, second and third channels. Wavelength drift of the carried frequencies of the channels in detected by comparing the three signals in an electronic combinatorial logic unit.

REFERENCES:
patent: 3964032 (1976-06-01), Bardos
patent: 5446572 (1995-08-01), Husbands et al.
patent: 2002/0186428 (2002-12-01), Saleheen
patent: 0 984 580 (1999-08-01), None
patent: 1 182 809 (2001-04-01), None

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