Abstract
Tm3+ doped GeS2–Ga2S3–CsCl (GGC) chalcohalide glasses are prepared by melt-quenching method. The 1.8μm emission of Tm3+ is investigated under the excitation of 808nm laser diode. The ratio of the 1.8μm emission intensity to that of the 1.48μm (I1.8/I1.48) reaches 10.7, it is much higher than previously reported Tm3+ doped oxide glasses. With the optimized doping concentration, the 1.8μm emission in a range of 1756 to 1876nm shows the largest full-width-at-half-maximum (FWHM) of ~120nm. The life time of Tm3+ reaches millisecond level for the present chalcohalide glasses. It is at the same level as oxide glass counterparts.
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