Article
Optics
Yufei Ma, Shanchun Zhang, Zhonghua Zhang, Xiaoxu Liu, Shoujun Ding, Wenpeng Liu, Qingli Zhang
Summary: The study demonstrated the performance of Nd:GdNbO4 laser under different pumping schemes and the behavior of two-dimensional nanosheets in passively Q-switched lasers.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Qing Wu, Yanyu Wang, Gang Zhao, Haibin Wu, Yi Hu, Mengke Wang
Summary: In this work, an all-solid-state Tm:YAP laser Q-switched by a graphdiyne (GDY) saturable absorber is demonstrated, achieving the shortest pulse duration and highest repetition frequency from GDY in a solid-state Tm laser to date. The study shows the remarkable nonlinear optical properties of GDY, indicating its promising potential in the field of optoelectronics.
Review
Instruments & Instrumentation
Yue Qi, Zhenxu Bai, Yulei Wang, Xuanpu Zhang, Yaoyao Qi, Jie Ding, Zhenao Bai, Zhiwei Lu
Summary: Lasers with 1.5 μm emission wavelengths are suitable for eye-safe applications and transparency in the atmosphere. They are extensively used in remote sensing, ranging, and imaging, with stronger penetration in bad weather conditions compared to traditional 1 μm and visible bands. Er:Yb: glass is commonly used to generate 1.5 μm lasers, particularly for passively Q-switched pulses.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Review
Crystallography
Yanxin Shen, Xinpeng Fu, Cong Yao, Wenyuan Li, Yubin Wang, Xinrui Zhao, Xihong Fu, Yongqiang Ning
Summary: This review focuses on the recent advances in optical crystals for 1.3 μm all-solid-state passively Q-switched lasers. The properties of three types of optical crystals and other crystals are introduced, and the research progress both domestically and abroad is summarized. The future challenges and development trends of 1.3 μm laser crystals are proposed.
Article
Instruments & Instrumentation
Xihu Wang, Jinyu Hu, Xuyang Wang, Jinlong Xu, Zhenyu You, Chaoyang Tu, Yijian Sun
Summary: A type of uniform Bi2Te3 nanowires were synthesized by a simple hydrothermal method and used as saturable absorber in a 2 μm mid-infrared solid state laser for the first time. Dual-wavelength passively Q-switched laser operation at 1945 nm and 1979.2 nm was achieved through careful adjustment. The Bi2Te3 nanowires exhibited better modulation capability compared to other popular saturable absorbers, indicating their potential as promising nanomaterials for mid-infrared solid state pulse lasers.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Baohao Xu, Wenjing Tang, Wanggen Sun, Jing Wang, Kai Jiang, Xinyu Hu, Wei Xia
Summary: This research demonstrates the use of two-dimensional germanene nanosheets as a saturable absorber for watt-level high-stability passive Q-switching operation in a solid-state Nd:YVO4 laser. The experimental results show that germanene material has remarkable nonlinear optical properties.
FRONTIERS IN PHYSICS
(2022)
Article
Polymer Science
Hongfu Huang, Jianwen Wang, Ning Xu, Shunxiang Liu, Guowen Liang, Qiao Wen
Summary: A transmissive saturable absorber (SA) with Ti2CTx MXene was successfully fabricated using the spin-coating method and integrated into a diode-pumped solid-state (DPSS) Nd:YAG laser for stable passively Q-switched operation. The laser achieved a shortest pulse duration of 163 ns and high slope efficiency and optical conversion efficiency at a pump power of 4.5 W. This work demonstrates the potential of Ti2CTx as a saturable absorber for solid-state laser pulse generation.
Article
Crystallography
Yijian Sun, Houping Xia
Summary: In this work, a Bi2Te3/graphene heterostructure with good nonlinear absorption characteristics was synthesized and investigated as a saturable absorber for pulsed lasers. The heterostructure showed improved performance compared to pure Bi2Te3 based lasers, demonstrating its potential as a promising saturable absorber for solid-state pulsed lasers emitting at ~1 μm.
Article
Instruments & Instrumentation
WenWen Cheng, TianShan Zhang, YongCheng Huang, MingYao Deng, Gang Huang, BingXuan Li, ZhangLang Lin, Yujin Chen, Yidong Huang, Yanfu Lin, WenBin Liao, Ge Zhang
Summary: The laser-diode-pumped 1.5 mu m multimode passively Q-switched Er,Yb:YAl3(BO3)4 microchip laser with a saturable absorber of Co2+:MgAl2O4 was experimentally studied. It was found that as the pumping power increased, the dynamics of the laser exhibited complex multimode behavior. In the multimode regions, an antiphase phenomenon of pulses with different modes was observed, and the dynamics of the laser pulse train became more complex, resembling the self-similarity of typical nonlinear dynamical systems.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Article
Optics
Zechang Shi, Xinghong Sun, Wenqiang Xie, Penghao Chang, Shiwei Li, Liming Zhang, Xiaotao Yang
Summary: A passively Q-switched Tm:YAP laser with a SnS2 saturable absorber fabricated by the liquid-phase exfoliation method was demonstrated. The optical characteristics of SnS2 SA were characterized and the performance of both continuous-wave and pulsed lasers was investigated.
Article
Optics
Yujin Chen, Jianhua Huang, Yanfu Lin, Xinghong Gong, Zundu Luo, Yidong Huang
Summary: The research demonstrated a high repetition frequency self-Q-switched 1.55 mu m pulse laser in an Er:Yb:Lu2Si2O7 crystal. Changing the pump beam diameter from 400 mu m to 100 mu m increased the repetition frequency to 230 kHz, decreased the duration to 236 ns, and reduced the pulse energy to 1.22 mu J.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Crystallography
Leilei Guo, Maorong Wang, Yifan Zhang, Shuaiyi Zhang, Kai Zhong, Qiuling Zhao, Lihua Teng, Xia Wang, Jianquan Yao
Summary: In this study, a passively Q-switched dual-wavelength Er: SrF2 laser using CsPbCl3 quantum dots as a saturable absorber was demonstrated. The laser showed efficient output power and short pulse duration, indicating the potential of halogen perovskite quantum dots as excellent saturable absorbers in mid-infrared lasers.
Article
Optics
Y. F. Chen, M. X. Hsieh, Y. C. Tu, C. C. Lee, Y. T. Yu, C. H. Tsou, H. C. Liang
Summary: The study fully considers the coupled rate equations with the spatial overlap effect for four-level passively Q-switched lasers, and derives a transcendental equation for the residual fraction of the inversion density. Comprehensive calculations are done to attain an analytical function for fitting the residual fraction. A pedagogical model with correction for high output coupling is developed for straightforward analysis of output pulse energy and peak power, validated through detailed experiments.
Article
Optics
Yujin Chen, Jianhua Huang, Yanfu Lin, Xinghong Gong, Zundu Luo, Yidong Huang
Summary: A 1.5-1.6 μm pulse laser passively Q-switched by a Co2+:MgAl2O4 crystal was realized in an Er:Yb:Sr3Gd2(BO3)(4) crystal, generating a pulse laser with energy of 9.1 μJ, repetition frequency of 15.6 kHz, and duration of 29 ns. The output laser beam exhibited linear polarization parallel to the Y optical indicatrix axis, making the Er:Yb:Sr3Gd2(BO3)(4) crystal a promising gain medium for 1.5-1.6 μm laser applications.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Zhicheng Zhang, Sha Wang, Xingwen Hu, Shaoqian Wang, Yongjie Pu, Huinan Li, Jun Wang
Summary: This paper proposes an effective strategy for generating flat-top beams in fibers, achieving high-quality pulsed flat-top and OAM beam emissions.
Article
Nanoscience & Nanotechnology
Fang Zhang, Mengxia Wang, Zhengping Wang, Kezhen Han, Xiaojuan Liu, Xinguang Xu
Article
Materials Science, Multidisciplinary
Mengxia Wang, Zhengping Wang, Xiangxu Chai, Yuxiang Sun, Tingting Sui, Xun Sun, Xinguang Xu
MATERIALS RESEARCH EXPRESS
(2018)
Article
Chemistry, Physical
Mengxia Wang, Fang Zhang, Zhengping Wang, Xinguang Xu
Article
Chemistry, Multidisciplinary
Hang Jiang, Yuanan Zhao, Hao Ma, Yi Wu, Meiling Chen, Mengxia Wang, Weili Zhang, Yujie Peng, Yuxin Leng, Zhaoliang Cao, Jianda Shao
Summary: An ultrafast all-optical switch based on enhanced nonlinear absorption of corrugated indium tin oxide (ITO) thin films is proposed. The switch achieves broad-band, polarization-independent, and wide-angle characteristics by taking advantage of the perfect absorption and localized field enhancement of epsilon-near-zero and localized surface plasmon resonance modes.
Article
Materials Science, Multidisciplinary
Meiling Chen, Yuanan Zhao, Hao Ma, Meng Guo, Ge Zhang, Yingjie Chai, Hang Jiang, Yafei Lian, Mengxia Wang, Jianda Shao
Summary: This study reports the nonlinear optical susceptibility characteristics of nanocrystalline ZnSe thin films with different thicknesses. The results show that the third-order nonlinear susceptibility of ZnSe films is dependent on the pump wavelength and film thickness, with thicker films exhibiting higher nonlinear optical properties.
Article
Chemistry, Multidisciplinary
Mengxia Wang, Ying Wang, Yi Wu, Hao Ma, Hang Jiang, Yuanan Zhao, Yujie Peng, Wenkai Li, Yuxin Leng, Kin Man Yu, Jianda Shao
Summary: A mid-infrared CdO based saturable absorber with high laser-induced damage threshold and broadband saturable absorption is demonstrated. Based on a tungsten-doping scheme, the effective tuning of the nonlinear optical response of CdO and customizable parameters of Q-switched lasers are realized. The design flexibility provided by CdO opens up a large parameter space that enables the improvement of mid-infrared ultrafast lasers.
ADVANCED FUNCTIONAL MATERIALS
(2023)
