Title :
Low-noise and high-gain 1.58 μm band Er3+-doped fibre amplifiers with cascade configurations
Author :
Ono, H. ; Yamada, M. ; Kanamori, T. ; Ohishi, Y.
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
fDate :
8/14/1997 12:00:00 AM
Abstract :
The authors constructed two low-noise and high-gain 1.58 μm band Er3+-doped fibre amplifiers (EDFAs) with cascade configurations. One consisted of 0.98 and 1.48 μm band pumped silica-based Er3+-doped fibre amplifier units as first and second units, exhibiting a noise figure of 5.0 dB and a signal gain of 32.8 dB for a 1.58 μm band WDM signal. The other employed a fluoride-based Er3+-doped fibre amplifier unit as a second unit and exhibited a noise figure of 5.1 dB and a signal gain of 25.0 dB. Both EDFAs had low-noise and high-gain characteristics ZrF4 -BaF2-LaF3-YF3-AlF3 -LiF-NaF:Er
Keywords :
aluminium compounds; barium compounds; erbium; fibre lasers; lanthanum compounds; laser noise; lithium compounds; optical communication equipment; silicon compounds; sodium compounds; yttrium compounds; zirconium compounds; 0.98 micrometre; 1.48 micrometre; 1.58 micrometre; 25.0 dB; 32.8 dB; 5.0 dB; 5.1 dB; SiO2:Er; ZrF4-BaF2-LaF3-YF3 -ALF3-LiF-NaF; ZrF4-BaF2-LaF3-YF3 -AlF3-LiF-NaF:Er; cascade configurations; fibre amplifiers; high-gain characteristics; low-noise characteristics; signal gain;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19970957
