Abstract
By partially substituting the Y3+ ions with Lu3+ ions, the widely investigated Pr:LiYF4 single crystal has been formated into Pr:LiY0.3Lu0.7F4 mixed crystal. In this work, we report the recent progress on diode-pumped continuous-wave Pr:LiY0.3Lu0.7F4 lasers in visible spectral region. Using a diode double-end pumping geometry, we have achieved red (∼640 nm), orange (∼607 nm), green (∼523 nm) and deep red (∼721 nm) lasers with maximum output powers and slope efficiencies of (3.28 W, 35.9%), (1.79 W, 19.8%), (1.61 W, 18.0%) and (1.56 W, 20.8%), respectively. The orange and deep red lasers are first demonstrated in the Pr:LiY0.3Lu0.7F4 mixed crystal, to the best of our knowledge. Moreover, the results represent the best laser performance for Pr3+ mixed crystal lasers. Researches on Pr3+ mixed crystals and their corresponding lasers are still on their initial stages, which could provide some new opportunities for the generation of high-power continuous-wave visible lasers and more importantly for the generation of femtosecond ultrashort pulsed visible lasers that is indeed very on demand.
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