Title :
Concentration effect on optical amplification characteristics of Er-doped silica single-mode fibers
Author :
Shimizu, Makoto ; Yamada, Makoto ; Horiguch, Masaharu ; Sugita, Etsuji
Author_Institution :
Opto-Electron. Lab., NTT, Ibaraki, Japan
Abstract :
Optical amplification characteristics for Er-doped silica core single-mode fiber amplifiers with different Er concentrations pumped by 1.48- mu m-wavelength laser diodes are studied. Optical gain drastically depends on Er concentration, even when the Er concentration is less than 1000 p.p.m. In the case of the 40-mW incident pump power, the maximum net gain for the fiber containing 77 p.p.m. Er is higher than that for the fiber containing 970 p.p.m. Er by 11.4 dB.<>
Keywords :
erbium; fibre optics; optical pumping; solid lasers; 1.48 micron; 40 mW; Er concentration; Er-doped silica single-mode fibers; concentration effect; fiber amplifiers; laser diode pump; net gain; optical amplification characteristics; optical gain; silica core; Doped fiber amplifiers; Erbium; Glass; Optical fiber amplifiers; Optical fiber polarization; Optical fibers; Optical pumping; Propagation losses; Silicon compounds; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
