Methods for monitoring performance in optical networks

Optical communications – Diagnostic testing – Determination of communication parameter

Reexamination Certificate

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C398S081000, C398S149000

Reexamination Certificate

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06912359

ABSTRACT:
A suite of optical performance monitoring (OPM) methods, based on optical subcarrier multiplexing, are described by the invention. The strength of this approach lies in the simplicity of double sideband subcarrier signals and the fact that these signals travel the complete optical path with the baseband signal of interest. The subcarrier signals can be recovered using techniques described in the application and are immune to fiber dispersion induced fading.

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patent: 6636661 (2003-10-01), Zeng
patent: 6778730 (2004-08-01), Hironishi
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patent: 2003/0103723 (2003-06-01), Bohn et al.
patent: 2003/0185568 (2003-10-01), Ooi et al.
patent: 2004/0008991 (2004-01-01), Waarts et al.

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