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We report optical amplification in a bismuth-doped silica fiber at 1308 nm with 810 nm excitation and demonstrated simultaneous optical amplification at two wavelengths near 1300 nm region. This wavelength is the closest to the important telecommunications window.
Near infrared emission with a bandwidth more than 450 nm which should be useful for ultra broadband optical amplifiers and tunable lasers for optical telecommunication, has been observed from Bi-doped lithium alumino silicate glass.
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