Zhang Nana, Xu Xiaodong, Pan Yuxin, Liu Jian
College of Chemistry & Chemical and Environmental Engineering, Weifang University, Weifang 261061, China.
Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China.
Materials (Basel). 2018 Sep 1;11(9):1575. doi: 10.3390/ma11091575.
Here, we demonstrate the broadband spectra and efficient laser performance of a disordered Nd:SrLaMgAlO (Nd:ASL) crystal. The polarized absorption and emission spectra were characterized and calculated with the Judd⁻Ofelt (J⁻O) theory, and the results show that this crystal has relatively large σ polarized absorption and emission cross sections, with peak emission cross sections of 4.5 × 10 cm² at 1051 nm and an emission width of 30 nm at 1074 nm, which are favorable for pulsed lasers. The laser-diode-pumped continuous-wave (CW) and passively Q-switched lasers at 1051 nm were realized for the first time to our best knowledge. For CW laser, the maximum output power was 1.95 W with the slope efficiency of 42.6%, and for the passive Q-switching, the maximum output power was 0.73 W with the pulse width of 7.96 ns and peak power of 5.64 W. The results demonstrate that Nd:ASL crystal is a potential candidate for lasers, especially high-peak pulsed lasers such as Q-switching and mode-locking.
在此，我们展示了无序Nd:SrLaMgAlO（Nd:ASL）晶体的宽带光谱和高效激光性能。利用Judd⁻Ofelt（J⁻O）理论对偏振吸收和发射光谱进行了表征和计算，结果表明该晶体具有相对较大的σ偏振吸收和发射截面，在1051 nm处的峰值发射截面为4.5×10⁻²⁰ cm²，在1074 nm处的发射带宽为30 nm，这有利于脉冲激光器。据我们所知，首次实现了激光二极管泵浦的1051 nm连续波（CW）和被动调Q激光器。对于连续波激光器，最大输出功率为1.95 W，斜率效率为42.6%；对于被动调Q，最大输出功率为0.73 W，脉冲宽度为7.96 ns，峰值功率为5.64 W。结果表明，Nd:ASL晶体是激光器的潜在候选材料，特别是对于调Q和锁模等高峰值脉冲激光器。
