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Transmission Technology: what’s the big deal? - page 40 / 46

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OADM

Dynamic OADM

Pump

Pump

EDF

Pump

Pump

EDF

DCM

3dB coupler splits optical power and “broadcasts” all wavelengths to drop port.

All wavelengths appear on drop port!

Coupler

Coupler

Dmx

Mux

Wavelengths are optically de-muxed.

Terminal

R

x

R

x

R

x

T

x

T

x

T

x

Receivers perform OEO conversion to client signal only for “dropped” wavelengths.

R

Software controlled DGE blocks dropped channels and gain equalizes “through” channels

Pump

Pump

EDF

DGE

Transmitters perform OEO conversion from client signal only for “added” wavelengths.

Only “added” wavelengths are coupled back into route.

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