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Transmission Technology: what’s the big deal? - page 38 / 46

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OADM

Static OADM

Pump

Pump

EDF

Pump

Pump

EDF

DCM

G

F

F

VOA

Static Thin-Film Filter (TFF) selects specific wavelengths to be dropped.

Typically, 4 to 8 specific channels are dropped.

TFF

TFF

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.

R

“Express” wavelengths that are dropped must be regen’d (OEO).

Non-dropped wavelengths are optically passed through.

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