Bh. Choi et al., Performances of erbium-doped fiber amplifier using 1530nm-band pump for long wavelength multichannel amplification, ETRI J, 23(1), 2001, pp. 1-8
The performance of a long wavelength-band erbium-doped fiber amplifier (L-b
and EDFA) using 1530nm-band pumping has been studied, A 1530nm-band pump so
urce is built using a tunable light source and two C-band EDFAs in cascaded
configuration, which is able to deliver a maximum output power of 23dBm, G
ain coefficient and noise figure (NF) of the L-band EDFA are measured for p
ump wavelengths between 1530nm and 1560nm, The gain coefficient with a 1545
nm pump is more than twice as large as with a 1480nm pump. It indicates tha
t the L-band EDFA consumes low power, The noise figure of 1530nm pump is 6.
36dB at worst, which is 0.75dB higher than that of 1480mn pumped EDFA. The
optimum pump wave-length range to obtain high gain and low NF in the 1530nm
band appears to be between 1530nm and 1540nm.
Gain spectra as a function of a pump wavelength have bandwidth of more than
10nm so that a broadband pump source can be used as 1530nm-band pump, The
L-band EDFA is also tested for WDM signals, Flat Gain bandwidth is 32nm fro
m 1571.5 to 1603.5nm within 1dB excursion at input signal of -10dBm/ch, The
se results demonstrate that 1530nm-band pump can be used as a new efficient
pump source for L-band EDFAs.