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2011
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Pros/cons of Raman amplification
Pros:
Works at any λ
Distributed amplification ⇒ better NF
Dual pumping ⇒ gain over whole transmission span
Cons:
Non-uniform gain
⇒ Multiple pumps
Need long fiber for significant gain
⇒ directly over transmission fiber
⇒ Usage: in-line amplification.
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