Title :
Erbium-doped fibre amplifiers with an extremely high gain coefficient of 11.0 dB/mW
Author :
Shimizu, Maiko ; Yamada, Makoto ; Horiguchi, M. ; Takeshita, Takaharu ; Okayasu, M.
Author_Institution :
NTT Opto-Electron. Labs., Ibaraki, Japan
Abstract :
A gain coefficient of 11.0 dB/mW is obtained using 0.98 mu m laser diode pumped erbium-doped fibre amplifiers with a low erbium concentration of 81 p.p.m. and a high relative refractive index difference of 1.88%.
Keywords :
erbium; fibre optics; optical communication equipment; optical fibres; solid lasers; 0.98 micron; 1.5 micron; EDFA; Er doped fibre amplifiers; gain coefficient; relative refractive index difference;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19901051
