Wang Chen, Chen Tianjie, Meng Zhe, Niu Sujian, Li Zhaoxue, Yang Xining
Xinjiang Key Laboratory for Luminescence Minerals and Optical Functional Materials, School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, China.
Nanomaterials (Basel). 2024 Nov 14;14(22):1823. doi: 10.3390/nano14221823.
Owing to their remarkable characteristics, two-dimensional (2D) layered, MAX phase materials have garnered significant attention in the field of optoelectronics in recent years. Herein, a novel MAX phase ceramic material (MoTiAlC) was prepared into a saturable absorber (SA) by the spin-coating method for passively Q-switching (PQS), and its nonlinear optical absorption properties were characterized with a Tm:YAlO (Tm:YAP) nanosecond laser. The structure characteristics and composition analysis revealed that the MoTiAlC material exhibits a well-defined and stable structure, with a uniform thin film successfully obtained through spin coating. In this study of a PQS laser by employing a MoTiAlC-based SA, an average output power of 292 mW was achieved when the absorbed pump power was approximately 4.59 W, corresponding to a central output wavelength of 1931.2 nm. Meanwhile, a stable pulse with a duration down to 242.9 ns was observed at a repetition frequency of 47.07 kHz, which is the narrowest pulse width recorded among PQS solid-state lasers using MAX phase materials as SAs. Our findings indicate that the MoTiAlC MAX phase ceramic material is an excellent modulator and has promising potential for ultrafast nonlinear photonic applications.
由于其卓越的特性，二维（2D）层状MAX相材料近年来在光电子学领域引起了广泛关注。在此，通过旋涂法将一种新型MAX相陶瓷材料（MoTiAlC）制备成可饱和吸收体（SA）用于被动调Q（PQS），并用Tm:YAlO（Tm:YAP）纳秒激光器对其非线性光学吸收特性进行了表征。结构特征和成分分析表明，MoTiAlC材料呈现出明确且稳定的结构，通过旋涂成功获得了均匀的薄膜。在这项采用基于MoTiAlC的SA的PQS激光器研究中，当吸收的泵浦功率约为4.59 W时，实现了292 mW的平均输出功率，对应的中心输出波长为1931.2 nm。同时，在47.07 kHz的重复频率下观察到了持续时间低至242.9 ns的稳定脉冲，这是使用MAX相材料作为SA的PQS固态激光器中记录到的最窄脉冲宽度。我们的研究结果表明，MoTiAlC MAX相陶瓷材料是一种优异的调制器，在超快非线性光子应用中具有广阔的潜力。
