US 2003/0152385 A1Published application

Wavelength division multiplexing optical performance monitors

AssigneeE. I. Du Pont de Nemours and Company

InventorsLouay Eldada, Reinald Gerhardt

Life of this patent

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Abstract

The present invention is generally directed to optical signal devices that monitor the quality of an optical signal in a wavelength division multiplexing system by evaluating the information in the different wavelength channels.

Claims12

Dependent claims

A wavelength division multiplexing (WDM) optical performance monitor apparatus, based on a tunable filter, and exhibiting behavior that is essentially polarization independent, where polarization independence is achieved through the use of a device selected from the group consisting of:

(a) a polarization mode splitter;
and (b) a power splitter or switch, and polarizers.

Dependencies are inferred from the claim text.

Facts

Application: 10/315,682Filed 10 Dec 2002
Priority: 10 Dec 2001
Published: 14 Aug 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04B 10/077
Using an in-service signal: using a supervisory or additional signal
G02B 6/12004
Of the integrated circuit kind: combinations of two or more optical elements
G02B 6/12007
Of the integrated circuit kind: forming wavelength selective elements, e.g. multiplexer, demultiplexer
G02B 6/2932
With a cascade of diffractive elements or of diffraction operations: comprising a directional router, e.g. directional coupler, circulator

Family

Application60/338,952Us provisional application · filed 10 Dec 2001
US 7,167,647 B2Related patent
US 2003/0152385 A1This patent

From the US filing history. Foreign family members aren’t listed.

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