Title :
1.58 μm band fluoride-based Er3+-doped fibre amplifier for WDM transmission systems
Author :
Ono, H. ; Yamada, M. ; Kanamori, T. ; Sudo, S. ; Ohishi, Y.
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
fDate :
8/14/1997 12:00:00 AM
Abstract :
An Er3+-doped fluoride-based fibre amplifier (F-EDFA) with flat amplification characteristics in the range 1565-1600 nm was constructed for the first time. This provided a 5 nm wider flat amplification range than a silica-based Er3+-doped fibre amplifier (S-EDFA). A flattened signal gain of 30 dB was achieved with a gain excursion of 0.9 dB for a WDM signal in this wavelength range. The Er3+-doped fluoride fibre (F-EDF) which achieved a signal gain of over 30 dB without any noise figure degradation had a shorter optimum length than Er3+-doped silica fibre (SEDF). Furthermore, F-EDF extended the amplification wavelength in the longer wavelength range by 2 nm compared with S-EDF
Keywords :
erbium; 1.58 micron; 1565 to 1600 nm; 30 dB; Er3+-doped fluoride-based fibre amplifier; WDM transmission systems; flat amplification characteristics;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19970987
