Abstract
Novel upconversion pumping schemes based on excited-state absorption (ESA) and photon avalanche are proposed for 2.3 μm (3H4→3H5) Thulium lasers. Low-threshold Tm3+:LiYF4 laser pumped at 1040 nm generates 102 mW at 2302 nm.
© 2019 The Author(s)
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