Title :
Concentration effect on gain of Pr/sup 3+/-doped fluoride fiber for 1.3 mu m amplification
Author :
Ohishi, Yasutake ; Kanamori, Terutoshi ; Nishi, Toshihiro ; Takahashi, Shiro ; Snitzer, Elias
Author_Institution :
NTT Corp., Ibaraki, Japan
Abstract :
The concentration quenching mechanism in Pr/sup 3+/-doped fluoride fiber operating at the 1.3- mu m band is investigated. It is confirmed that the cooperative upconversion process causes signal gain saturation with pump power and degrades the gain characteristics of Pr/sup 3+/-doped fluoride fiber at a concentration of 1000 p.p.m. The reduction in gain coefficient due to cooperative upconversion is almost suppressed at a concentration of 500 p.p.m. A Pr/sup 3+/ concentration of 500 p.p.m. is a practical concentration for the fabrication of efficient Pr/sup 3+/-doped fluoride fiber amplifiers.<>
Keywords :
aluminium compounds; barium compounds; fibre lasers; lanthanum compounds; laser theory; optical pumping; optical saturable absorption; praseodymium; sodium compounds; zirconium compounds; 1.3 micron; IR; Pr/sup 3+/-doped fluoride fiber; Pr/sup 3+/-doped fluoride fiber amplifiers; ZBLAN glass; ZBLAN:Pr/sup 3+/; ZrF4-BaF2-LaF3-AlF3-NaF:Pr; concentration quenching mechanism; cooperative upconversion process; fibre amplifier fabrication; fibre laser amplifiers; gain characteristics; gain coefficient; practical concentration; pump power; signal gain saturation; Absorption; Degradation; Doped fiber amplifiers; Electrons; Fiber lasers; Light sources; Optical fiber amplifiers; Optical pumping; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
