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Superbroadband 1310 nm emission from bismuth and tantalum codoped germanium oxide glasses

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Abstract

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 1310nm, a FWHM broader than 400 nm, and a lifetime longer than 200μs. 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

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