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Room-temperature tunable-laser action has been observed in Cr-doped SrAlF5. The measured tuning range is 852–947 nm in a quasi-cw laser mode. The effect of nonequivalent Cr sites in SrAlF5 is studied from the absorption and the excitation spectra. A broad absorption band peaked near 750 nm does not contribute to the Cr emission and appears to be associated with a nonradiative site.
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Jenssen et al. (1986) studied this question.
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