Near-infrared broadband emission from bismuth-tantalum-codoped germanium oxide glasses was observed at room temperature when the glasses were pumped by an 808 nm laser diode. The emission band covered the O, E, S, C, and L bands (1260-1625 nm), with a maximum peak at ∼1310 nm, a FWHM broader than 400 nm, and a lifetime longer than 200 µs. The observed broadband luminescence was attributed to bismuth clusters in the glasses. Bismuth-tantalum-codoped germanium oxide glass might be promising as amplification media for broadly tunable lasers and wideband amplifiers in optical communications.
© 2005 Optical Society of America
Mingying Peng, Jianrong Qiu, Danping Chen, Xiangeng Meng, and Congshan Zhu, "Superbroadband 1310 nm emission from bismuth and tantalum codoped germanium oxide glasses," Opt. Lett. 30, 2433-2435 (2005)