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Yttria-alumina-silica (YAS) glasses doped with Er/sup 3+/ and Tm/sup 3+/ have been examined spectroscopically for their potential as fiber amplifier gain media for optical telecommunication systems. Absorption and emission spectra as well as emission lifetime measurements and Judd-Ofelt calculations are reported. Tm/sup 3+/: YAS glass exhibits an emission bandwidth of 122 nm around 1470 nm, making it promising for S/sup +/-band amplification.
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Jander et al. (2004) studied this question.
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