Long-period fiber-grating-based gain equalizers.
Long-period fiber gratings are used to f latten the gain spectrum of erbium-doped fiber amplifiers. A broadband amplifier with <0.2-dB gain variation over 30 nm is presented. We also show that a chain of amplifiers can be equalized, leading to a bandwidth enhancement by a factor of 3.
Vengsarkar
A M
AM
Pedrazzani
J R
JR
Judkins
J B
JB
Lemaire
P J
PJ
Bergano
N S
NS
Davidson
C R
CR