Chromatic D ispersion .

ChromaticChromatic DDispersionispersion

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What is dispersion?

Effects of dispersion

OverviewOverview

Differential delay

Increased Bit Error Rate

Types of dispersion

Chromatic Dispersion Definition

The cause ofChromatic Dispersion

Dispersion by design

Fibers type

Optical Fibers: Attenuation & Dispersion

Why is measuring Dispersion so Why is measuring Dispersion so important?important?

Dispersion compensationDispersion 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

D1L1 - DkLk=0,

Dispersion [ps/nm]

L [km]200 400 600 800

400

600

800

200

1000

NZDSFDCF

Managing Chromatic Dispersion

Dispersion Compensation MethodBragg gratings

Fiber Dispersion Characteristics

Dispersion compensation for DWDM

References

http://www.porta-http://www.porta-optica.orgoptica.org

Reichle & De-Massari

Chromatic D ispersion .

Documents

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