Mid-infrared properties of optical parametric oscillations based on layered PtS2 modulated laser pumping

Heze Guo; Jing Wang; Xinyu Hu; Kai Jiang; Wenjing Tang; Wei Xia

doi:10.1117/12.2641608

28 December 2022 Mid-infrared properties of optical parametric oscillations based on layered PtS₂ modulated laser pumping

Heze Guo, Jing Wang, Xinyu Hu, Kai Jiang, Wenjing Tang, Wei Xia

Author Affiliations +

Proceedings Volume 12310, Advanced Lasers, High-Power Lasers, and Applications XIII; 1231010 (2022) https://doi.org/10.1117/12.2641608
Event: SPIE/COS Photonics Asia, 2022, Online Only

Conference Poster

Abstract

In recent years, layered transition metal sulfides (TMDCs) exhibit excellent nonlinear saturable absorption properties in laser modulations. Nevertheless, few of them are applied to the optimization of optical parametric oscillators (OPOs). In this work, we prepared a 12.5 nm-thickness platinum disulfide (PtS₂) saturable absorber (SA) by a combination of electron beam evaporation (EBE) and post-vulcanization method. The nonlinear transmittance is measured, which exhibits the SA characteristic of PtS₂ film. The acousto-optic (AO) Q-switch and the prepared PtS₂ SA are used to realize the operation of active and passive Q-switched OPO, and the mid-infrared idler pulse with nanosecond width is obtained. By measuring the experimental output results, the optimizations of PtS₂ SA to OPO’s operation are analyzed, including the stabilization of pulse train by 240%, the compression of idler-light pulse by 59.7%, the improvement of peak power by 198%. As a result, the improvement of nonlinear conversion is attained by 16.9%. The phenomenon may be due to the excellent saturable absorption effect of PtS₂ SA to the fundamental light. This paper shows the optimization effect of the prepared layered transition metal sulfide for laser intracavity modulation on the nonlinear frequency conversion process, especially for the improve of nonlinear conversion effect.

Citation Download Citation

Heze Guo, Jing Wang, Xinyu Hu, Kai Jiang, Wenjing Tang, and Wei Xia "Mid-infrared properties of optical parametric oscillations based on layered PtS₂ modulated laser pumping", Proc. SPIE 12310, Advanced Lasers, High-Power Lasers, and Applications XIII, 1231010 (28 December 2022); https://doi.org/10.1117/12.2641608

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