Title :
Gain characteristics of erbium-doped fibre amplifiers with high erbium concentration
Author :
Kimura, Yuichi ; Nakazawa, Masataka
Author_Institution :
NTT Telecommun. Field Syst. R&D Center, Ibaraki, Japan
fDate :
7/16/1992 12:00:00 AM
Abstract :
The gain characteristics of erbium-doped fibre amplifiers with erbium concentrations as high as 8900 ppm have been investigated with 0.98 and 1.48 mu m pumping schemes. In spite of the gain decrease due to the high erbium concentration, a gain as high as 24 dB was obtained with a 50 cm long fibre at a pump power of 60 mW. An output power of +8 dBm was also obtained for a pump power of 60 mW with both 0.98 and 1.48 mu m pumping. The 0.98 mu m pumping scheme is suitable for high concentration EDFAs.
Keywords :
erbium; fibre lasers; optical communication equipment; optical pumping; 0.98 micron; 1.48 micron; 24 dB; 50 cm; 60 mW; Er concentration; fibre amplifiers; gain characteristics; high concentration EDFAs; output power; pump power; pumping schemes;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920903
