
Page 27 / 40
2011
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SOAs: poor amplifiers
Historically, SOA problems:
SOA fast (∼ 1 ns) ⇒ bit-timescale signal distortions
t t
through SOA
NRZ signal
NRZ signal
Nonlinearities, four-wave mixing ⇒ problem with WDM
⇒ EDFA preferred, except:
Niche: transmissions outside C-band
Niche: integrated amplifiers (e. g. with photodiode)
Active MZI gates
Signal processing: λ conversion, regeneration...
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