Abstract
Fluorophosphate glass triply doped with Ho3+/Tm3+/Pr3+ has been synthesized. 2.86, 2 and 1.47 μm emissions have been successfully obtained from the present glass pumped by conventional 800 nm LD. The corresponding energy transfer mechanisms and microparameters are discussed and analyzed according to the photoluminescence performance and absorption measurements. Tm3+ ions can absorb the pumping energy and transfer it to Ho3+ and Pr3+ ions. Large energy transfer coefficient from Ho3+ to Pr3+ ions (8.22 × 10−39 cm6/s) has been obtained based on the Forster-Dexter theory. The results suggest Ho3+/Tm3+/Pr3+ triply doped fluorophosphate glass is a promising candidate for efficient mid-infrared laser.
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