Continuous harmonic mode-locked pulsed ultrafast fiber laser based on PtS2 saturable absorber

作者：Shixian Sun, Yutian He, Yu Han, Guangzhao Zhu, Xinxin Shang, Lezheng Wang, Yunqi Tang, Keyi Li, Hao Tan, Cheng Lu, Wenfei Zhang, Guomei Wang, Caixun Bai, Zhao Li, Nannan Xu, Huanian Zhang, Shenggui Fu · 发表于：Journal of Luminescence · 年份：2024 · DOI：10.1016/j.jlumin.2024.120958 · 被引用次数：6 · 研究领域：Advanced Fiber Laser Technologies、Laser-Matter Interactions and Applications、Photonic Crystal and Fiber Optics

Saturable absorbers (SAs) play an important role in mode-locked fiber lasers . The search for SAs with excellent modulation properties has become a hot topic in the field of ultrafast photonics . PtS 2 is a ideal material for SA due to its suitable band gap and Easily peelable layer structure. We prepared PtS 2 -SA by liquid-phase exfoliation (LPE) and tapered fiber. Subsequently, we measured the modulation depth of the prepared SA using the two-arm detection method as 6.4 %, and the saturation intensity is 4.5 MW/cm 2 . By varying the input power in the annular cavity , a conventional solitons (CS) with a center wavelength is 1530.3 nm and a repetition frequency of 6.1 MHz was obtained. Continuing to increase the power, a stable second-fourth orders harmonic mode-locked (HML) was obtained. Our work shows that PtS 2 -SA has excellent modulation in mode-locked fiber lasers. It also proves that PtS 2 has good saturable absorption properties and improves the knowledge of research workers about the performance of PtS 2 . There is hope in future research work to further exploit the output properties of PtS 2.