Damiano Eugenio, Cittadino Giovanni, Di Lieto Alberto, Tonelli Mauro
MEGA Materials s.r.l., Largo Bruno Pontecorvo 3, 56127 Pisa, Italy.
NEST, Istituto Nanoscienze-CNR, Piazza S. Silvestro 12, 56127 Pisa, Italy.
Materials (Basel). 2020 Oct 19;13(20):4655. doi: 10.3390/ma13204655.
The demand for tunable visible laser sources with high power and high beam quality, for application ranging from metrology to remote sensing, is constantly increasing. In this work, we report on the details of crystal growth, via the Czochralski method, and laser characterization of a Pr-doped Ba(Y1-xLux)2F8 (BYLF) single crystal, which is a promising candidate for fulfilling these requirements, both in terms of tunability and high-power capabilities. We measured for the first time the laser tunability curve in the deep red region obtaining a continuous range of 17 nm. The laser emission of the three main Pr3+ lines in the visible (orange, red, and deep red) was tested under increased pump power with respect to previous studies on this material, demonstrating output powers of more than 360 mW and no thermal rolloff, up to 1.9 W of absorbed power.
从计量学到遥感等应用领域对具有高功率和高光束质量的可调谐可见激光源的需求在不断增加。在这项工作中，我们报告了通过提拉法生长晶体的细节，以及掺镨的Ba(Y1-xLux)2F8（BYLF）单晶的激光特性，该单晶在可调谐性和高功率能力方面都是满足这些要求的有前途的候选材料。我们首次测量了深红色区域的激光调谐曲线，获得了17 nm的连续范围。相对于此前对该材料的研究，在增加泵浦功率的情况下测试了可见区（橙色、红色和深红色）中三条主要Pr3+谱线的激光发射，结果表明输出功率超过360 mW，且无热滚降，吸收功率高达1.9 W。
