Huang Conghui, Lin Wenfang, Fang Qiannan, Xu Min, Zhang Shulong, Tao Siliang, Li Shanming, Zhao Chengchun, Hang Yin
Opt Lett. 2024 Jun 1;49(11):2994-2997. doi: 10.1364/OL.525380.
We reported on the spectral properties and dual-wavelength laser performances of a novel, to the best of our knowledge, Nd:GdYScAlO (Nd:GYSAG) crystal for the first time. The absorption spectra, emission spectra, and fluorescence lifetime were systematically investigated. Further, a continuous-wavelength (CW) laser output power up to 5.02 W was obtained under an absorbed pump power of 9.45 W with slope and optical-to-optical efficiencies of 59.4% and 53.1%, respectively, at 1061.2 and 1063.2 nm. A stable passively Q-switched (PQS) laser employing Cr:YAG as a saturable absorber (SA) was realized. The maximum average output power of 0.756 W with a slope of near 34.4% was obtained with the pulse width, pulse energy, and peak power of 14.0 ns, 128.1 µJ, and 9.15 kW, respectively. The results indicate that the Nd:GYSAG crystal is an excellent laser medium for generating a high-efficiency dual-wavelength laser and has potential in terahertz (THz) laser generation.
据我们所知，我们首次报道了一种新型钕：钆钇钪铝石榴石（Nd:GYSAG）晶体的光谱特性和双波长激光性能。系统研究了其吸收光谱、发射光谱和荧光寿命。此外，在9.45 W的吸收泵浦功率下，于1061.2和1063.2 nm处分别获得了高达5.02 W的连续波长（CW）激光输出功率，斜率效率和光光转换效率分别为59.4%和53.1%。实现了一种以Cr:YAG作为饱和吸收体（SA）的稳定被动调Q（PQS）激光器。分别获得了脉宽为14.0 ns、脉冲能量为128.1 µJ、峰值功率为9.15 kW、最大平均输出功率为0.756 W且斜率接近34.4%的结果。结果表明，Nd:GYSAG晶体是一种用于产生高效双波长激光的优良激光介质，在太赫兹（THz）激光产生方面具有潜力。
