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article
Ultrabroad emission from a bismuth doped chalcogenide glass
Abstract
We report emission from a bismuth doped chalcogenide glasswhich is flattened, has a full width at half maximum (FWHM) of 600 nm,peaks at 1300 nm and covers the entire telecommunications window. Atcryogenic temperatures the FWHM reaches 850 nm. The quantumefficiency and lifetime were as high as 32% and 175 μs, respectively. Wealso report two new bismuth emission bands at 2000 and 2600 nm.Absorption bands at 680, 850, 1020 and 1180 nm were observed. The 1180nm absorption band was previously unobserved. We suggest that the originof the emission in Bi:GLS is Bi 22− dimers.