Title :
Erbium-doped fiber amplifier pumped at 1.48 mu m with extremely high efficiency
Author :
Kashiwada, T. ; Shigematsu, M. ; Kougo, T. ; Kanamori, H. ; Nishimura, M.
Author_Institution :
Sumitomo Electr. Ind. Ltd., Yokohama, Japan
Abstract :
An erbium-doped fiber amplifier pumped at 1.48 mu m with extremely high efficiency has been developed. The fiber has a relative refractive index difference of 2.0% and Er/sup 3+/ ions and alumina are doped only in a limited area of the core. A slope efficiency of 86% and a gain coefficient of 6.3 dB/mW have been achieved by 1.48 mu m pumping along with excellent spectral signal output performance. In spite of its small mode-field diameter, it is possible to fusion-splice the fiber to standard dispersion-shifted fibers with low loss due to diffusion of fluorine dopant in the classing.<>
Keywords :
erbium; fibre lasers; optical communication equipment; optical pumping; refractive index; 1.48 micron; Er doped fiber amplifier; GeO/sub 2/-SiO/sub 2/-Al/sub 2/O/sub 3/:Er; dispersion-shifted fibers; extremely high efficiency; fusion-splice; gain coefficient; low loss; optical fibre communication; refractive index; slope efficiency; small mode-field diameter; spectral signal output performance; Energy conversion; Erbium-doped fiber amplifier; Light sources; Optical fiber communication; Optical fiber devices; Optical fiber polarization; Optical pumping; Optical refraction; Optical variables control; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
