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Real-time all-optical performance monitoring using optical bit-shape correlation.

Feras Abou-Galala¹, Betty Lise Anderson

¹Department of Electrical Engineering, University of California, Riverside, 900 University Avenue, Riverside, California 92521, USA.

|February 12, 2009

Summary

A novel optical correlator monitors optical link performance in real time by comparing received bit shapes to a standard. This technique rapidly measures signal degradation without lengthy data analysis.

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Area of Science:

Optical communications engineering
Photonics
Signal processing

Background:

Real-time performance monitoring is crucial for optical communication systems.
Traditional methods like bit stream comparison and eye diagram analysis can be time-consuming and complex.
There is a need for faster, more direct methods to assess signal quality.

Purpose of the Study:

To demonstrate a new, real-time optical performance monitoring technique for optical links.
To introduce a novel all-optical correlator for bit shape comparison.
To provide a rapid and direct measure of signal degradation.

Main Methods:

An all-optical correlator was designed and implemented.
The correlator compares the shapes of individual received bits against a standard.

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Quasi-light Storage for Optical Data Packets

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A simplified White cell-based true-time delay device forms the basis of the correlator.

Main Results:

The technique successfully monitors optical link performance in real time.
The correlator's output pulse strength directly quantifies bit degradation during transmission.
Results are obtained within three bit periods, significantly faster than traditional methods.

Conclusions:

The demonstrated optical correlator offers a highly efficient real-time performance monitoring solution.
This method bypasses the need for extensive statistical analysis of long data streams.
The technique provides immediate insights into signal integrity in optical links.