Er3+-doped phosphor-tellurite glass for broadband short-length Er3+-doped fiber amplifier (EDFA) is fabricated and characterized. The differential value (Delta T) of onset crystalline temperature (Tx) and glass transition temperature (Tg) is 206 centigrade. The stimulated emission cross section of Er3+ is calculated from absorption spectrum by McCumber theory and is 0.87*10^(-20) cm^2 at 1532 nm. A broad 1.5-micron fluorescence spectrum with 54-nm full-width at half maximum (FWHM) is demonstrated. Especially, the maximum phonon energy of undoped phosphor-tellurite glass is 1100 cm^(-1), which restricts the upconversion luminescence. It is possible to pump efficiently at 980 nm. These results indicate Er3+-doped phosphor-tellurite glass is suitable for fabricating broadband short-length EDFA.
© 2008 Chinese Optics Letters
Shilong Zhao, Fei Zheng, Shiqing Xu, Huanping Wang, and and Baoling Wang, "Er3+-doped phosphor-tellurite glass for broadband short-length Er3+-doped fiber amplifier," Chin. Opt. Lett. 6, 276-278 (2008)