Chromatic Dispersion.

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Presentation transcript:

Chromatic Dispersion.

What is dispersion?

Effects of dispersion

Overview

Differential delay

Increased Bit Error Rate

Types of dispersion

Chromatic Dispersion Definition

The cause of Chromatic Dispersion

Dispersion by design

Fibers type

Optical Fibers: Attenuation & Dispersion

Why is measuring Dispersion so important?

Dispersion compensation

Dispersion compensation for DWDM

CD management Prevention: 1. Compensation: - Fibers DCF & RDF, - Bragg Gratings technique. 2. Decreasing impulse spectral width: - external modulation, - pulse shaping of current modulation. 3. Soliton transmission.

CD compensation D 1 L 1 - D k L k =0, Dispersion [ps/nm] L [km] NZDSF DCF

Managing Chromatic Dispersion

Dispersion Compensation Method Bragg gratings

Dispersion Compensation Method Bragg gratings

Fiber Dispersion Characteristics

Dispersion compensation for DWDM

References Reichle & De-Massari