Title :
Suppression mechanism by Ca additive of photo-darkening effect in Yb-doped silica glass fiber
Author :
Fujimoto, Yasutaka ; Sugiyama, Shunsuke ; Murakami, M. ; Nakano, Hisamatsu ; Sato, Takao ; Shiraga, H.
Author_Institution :
Inst. of Laser Eng., Osaka Univ., Suita, Japan
Abstract :
We found that Ca additive effectively suppresses the photo-darkening (PD) effect in Yb-doped silica fiber even at 6.0 wt% of high Yb2O3 concentration. Ca ion works as a stabilizer to maintain the Yb3+ valence state. We hypothesize that this phenomenon may reflect the local charge balance effect in silica glass. This Yb-Ca co-doped silica fiber can be useful for high-power fiber lasers.
Keywords :
calcium; optical fibre amplifiers; optical glass; photochromism; silicon compounds; valence bands; ytterbium; ytterbium compounds; Ca additive; Ca ion; SiO2:(Yb,Ca); Yb-Ca co-doped silica fiber; Yb-doped silica glass fiber; Yb2O3; Yb2O3 concentration; Yb3+ valence state; high-power fiber lasers; local charge balance effect; photodarkening effect; stabilizer; suppression mechanism; Fiber lasers; Glass; Optical fiber communication; Optical fiber dispersion; Optical fibers; Silicon compounds;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2013 Conference on
Conference_Location :
San Jose, CA
