Cassouret Florent, Badtke Moritz, Loiseau Pascal, Aka Gérard
Opt Express. 2023 Apr 10;31(8):12497-12507. doi: 10.1364/OE.487749.
In this work, we present the visible laser performance of improved optical quality Czochralski-grown 4 at.% Pr-doped SrLaMgAlO (Pr:ASL) single crystals in the deep red (726 nm), the red (645 nm) and the orange (620 nm) range using two different pumping sources. Using a high beam quality frequency doubled Ti:sapphire laser with 1 W output power as pump source, deep red laser emission was reached at a wavelength of 726 nm with 40 mW of output power and a laser threshold of 86 mW. The corresponding slope efficiency was 9%. At 645 nm in the red, up to 41 mW of laser output power were obtained with 15% slope efficiency. Moreover, orange laser emission at 620 nm was demonstrated with 5 mW output power and 4.4% slope efficiency. Using a 10 W multi-diode module as pumping source allowed to obtain the highest output power of a red and deep-red diode-pumped Pr:ASL laser to date. The respective output powers at 726 and 645 nm reached 206 mW and 90 mW.
在这项工作中，我们展示了采用两种不同泵浦源时，光学质量得到改善的提拉法生长的4 at.% 掺镨的SrLaMgAlO（Pr:ASL）单晶在深红色（726 nm）、红色（645 nm）和橙色（620 nm）波段的可见激光性能。使用输出功率为1 W的高光束质量倍频钛宝石激光器作为泵浦源，在波长726 nm处实现了深红色激光发射，输出功率为40 mW，激光阈值为86 mW。相应的斜率效率为9%。在红色波段的645 nm处，获得了高达41 mW的激光输出功率，斜率效率为15%。此外，在620 nm处实现了橙色激光发射，输出功率为5 mW，斜率效率为4.4%。使用10 W多二极管模块作为泵浦源，获得了迄今为止红色和深红色二极管泵浦Pr:ASL激光器的最高输出功率。在726和645 nm处的各自输出功率分别达到206 mW和90 mW。
