Article
Optics
Pengbo Jiang, Xin Ding, Jian Guo, Haiwei Zhang, Haifeng Qi, Ying Shang, Zhiqiang Song, Weitao Wang, Chen Wang, Jiasheng Ni, Jianquan Yao
Summary: We propose and experimentally demonstrate a high-efficient and high-polarization-ratio acousto-optic (AO) Q-switched dual-crystal hybrid gain laser. Combing the advantages of Nd:YAG and Nd:YVO4 crystals, it exhibits excellent power performance across a broad pulse repetition frequencies (PRFs) range while maintaining satisfactory polarization characteristics without the aid of additional polarized optical components.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Jiajia Mao, Ping Hu, Xue Zhou, Jingkun Zhang, Ruihua Wang, Hongkun Nie, Jintian Bian, Baitao Zhang, Tao Li, Jingliang He, Kejian Yang
Summary: A high-performance diode-tandem-pumped actively Q-switched Tm:YAP laser is demonstrated, achieving a maximum output power of 10.6 W with a pulse width of 37 ns, a pulse energy of 2.12 mJ, and a peak power of 57.3 kW at a pulse repetition rate of 5 kHz. Comparatively, an actively Q-switched Tm:YAP laser with a single gain crystal double-end pumped obtains a maximum output power of 6.8 W with a pulse width of 45 ns, a pulse energy of 1.36 mJ, and a peak power of 28.3 kW at the same pulse repetition rate. The experimental results clearly reveal the effect of diode-tandem-pumping regime on lowering down the thermal load of gain medium.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Instruments & Instrumentation
Siwei Peng, Xinxin Huang, Shuanghong Ding
Summary: In this study, a folded cavity of LD side-pumped acousto-optically Q-switched Nd:YAG/SrWO4 solid-state Raman laser is designed. The effects of thermal focal length and resonator length on the resonator modes are analyzed to achieve low SRS threshold, high conversion efficiency, and high beam quality. The experimental results show that the laser has high output power, high single pulse energy, and high beam quality.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Youyi Zhuang, Wenjie Mao, Xinghong Gong, Xinxin Jin, Zhihong Li, Yidong Huang, Yanmin Duan
Summary: In this study, a diode end-pumped Nd,La:CaNb2O6 self-Raman laser with acousto-optic Q-switching was used to generate the first Stokes wave at 1,174 nm. It was found that doping La3+ ions could improve the laser output performance and suppress fluorescence quenching.
FRONTIERS IN PHYSICS
(2022)
Article
Optics
Zhanda Zhu, Shiwei Lv, Hanyi Zhang, Yongling Hui, Hong Lei, Qiang Li
Summary: A novel gain medium structure has been designed to achieve high efficiency Q-switched pulses with an optical-optical conversion efficiency of 30.5%, which is the highest reported for actively Q-switched Nd:YAG lasers at the hundred milli-joules level.
Article
Optics
Wensheng Zhang, Qiong Gao, Sheng Zhou, Linjun Li, Xinzhi Ma
Summary: This paper demonstrates a diode-pumped acousto-optical Q-switched Ho:GTO laser with achieved maximum output power and pulse energy at different repetition rates, and calculated the corresponding peak power. Additionally, the authors estimated the beam quality factors of the laser.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Shutao Li, Ruichen Tang, Guangyong Jin, Chao Wang
Summary: A diode-pumped acousto-optic Q-switched crystal Raman laser operating at multi-wavelength has been developed, utilizing c-cut Nd:YVO4 and c-cut GdVO4 crystals as the Raman media. The laser output, composed of different wavelength lights, was optimized by adjusting the pulse repetition frequencies and incident pump power.
APPLIED PHYSICS B-LASERS AND OPTICS
(2021)
Article
Engineering, Electrical & Electronic
Jianping Shen, Xin Huang, Shaocong Xu, Peng Lu, Songtao Jiang, Rongrong Jiang
Summary: In this study, a watt-level acousto-optic (A-O) Q-switched intracavity frequency-doubled green laser with high average power and beam quality operation was demonstrated based on an efficient LED-pumped Nd:YAG laser module. The highest average output power of fundamental laser at 1064 nm in quasi-continuous wave (QCW) running mode was 10.3 W at a repetition rate of 100 Hz, with optical conversion efficiency of 25.4% and slope efficiency of 31.3%. The maximum energy of single pulse reached 100 mJ. Furthermore, an average power of greater than 3.8 W at 532 nm was generated at a repetition rate of 10 kHz, with duration of 192 ns and a beam quality factor of M-x(2) = 1.6 and M-y(2) = 1.7, corresponding to a frequency doubling conversion efficiency of 45.5%. This represents the highest average power and high beam quality achieved in an LED-pumped A-O Q-switched intracavity frequency-doubled green laser with watt-level output reported to date.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Optics
Xin Zhang, Cunzhu Tong, Bo Meng, Kaidi Cai
Summary: To improve the single pulse energy of a Q-switched fiber laser in the deep mid-infrared region, a mechanical switch was used in a dual-wavelength pumping system. The maximum pulse energy achieved was 9.4 μJ with a repetition rate of 8.4 kHz. However, multiple pulses started to form as the pump power increased, limiting further improvement. The multiple pulses were caused by relaxation oscillation and were influenced by the pump power, modulation rate, and duty cycle of the mechanical switch. The presence of a Q-switched laser at 2.8 μm also reduced the pulse energy of the 3.5 μm laser, indicating room for further improvement.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Petr G. Zverev, Igor Smirnov, Anatoly A. Sirotkin
Summary: Dual- and triple-wavelength Nd:YAG lasers with electro-optically Q-switching were demonstrated using an intracavity etalon. The spectral composition of the laser output could be controlled by adjusting the angle of the intracavity YAG etalon. Experimental results matched well with calculated values. The intracavity etalon method provides a way to switch between different wavelength modes.
LASER PHYSICS LETTERS
(2023)
Article
Optics
Zixin Yang, Syde Zaheer Ud Din, Pengchao Wang, Chun Li, Zhiwei Lin, Jiancai Leng, Jie Liu, Lin Xu, Qi Yang, Xianghe Ren
Summary: We report the generation of high energy visible pulsed beam from a blue LD-pumped electro-optically Q-switched Pr:YLF laser for the first time. Through optimization of experimental conditions, we obtained the shortest pulse duration and highest peak power at a repetition rate of 100 Hz, demonstrating excellent performance.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Alexey Gribanov, Mikhail Yakovin, Dmitry Yakovin, Mikhail Mosin
Summary: For the first time, a Q-switched Nd:YAG laser has been actively mode-locked at a subharmonic frequency, according to the authors. The laser operation mode is achieved by combining a traveling wave acousto-optic modulator with a spherical cavity mirror. The study investigates the dynamics of laser generation and obtains 70 ps pulses with a peak power of approximately 10 MW. Additionally, new results are presented on obtaining high-power (around 60 kW) picosecond tunable radiation in the 620 nm region through frequency conversion of a superluminescent parametric generator pumped by the laser.
CHINESE OPTICS LETTERS
(2023)
Article
Optics
Wensheng Zhang, Linjun Li, Qiong Gao, Sheng Zhou
Summary: In this study, a diode-pumped electro-optically Q-switched Ho:GTO laser was presented, utilizing a langasite crystal as the EO Q-switch. The laser achieved a high peak power and excellent beam quality factors.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Richard Svejkar, Jan Sulc, Michal Nemec, Helena Jelinkova
Summary: This paper presents a compact diode-pumped continuous-wave Er:YLF laser emitting radiation at 2.8 mu M with output power 2.9 W and slope efficiency 26.2%. Additionally, passive Q-switching was successfully demonstrated with Fe:ZnSe polycrystal as a modulator, resulting in a pulse duration of 21 ns with peak power 252 W.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Crystallography
Jian-Cheng Chen, Yu-Wen Ho, Yueh-Chi Tu, Hsing-Chih Liang, Yung-Fu Chen
Summary: A novel scheme was developed for a diode-pumped passively Q-switched Nd:YVO4/KGW Raman laser at 589 nm with a diode-to-orange conversion efficiency reaching 11.4%. The compact near-concentric cavity was designed to achieve good passive Q-switching and contain a coupled resonator for intracavity stimulated Raman scattering (SRS) and second harmonic generation (SHG). The dependence of the output performance on the initial transmission of the saturable absorber was explored, and the influence of the pump-to-mode size ratio was also considered.
Article
Optics
Si Chen, Yanjuan Wang, Fuhao Yang, Mingxiao Zhu, Shuo Sun, Zhiqi Sui, Zhifeng Hong, Yunao Han, Cheng Lu, Guomei Wang, Huanian Zhang, Xiaohan Chen, Wenfei Zhang, Shenggui Fu
Summary: A Pb3Sn4FeSb2S14-polyvinyl alcohol film was prepared using the liquid phase exfoliation method and its nonlinear optical properties were studied. The film was used as a saturable absorber in an Er-doped fiber laser, enabling easy generation of large-energy mode-locked pulses.
Article
Optics
Quanxin Guo, Shuzhen Fan, Xiaohan Chen, Xingyu Zhang, Zhenhua Cong, Zhaojun Liu, Zengguang Qin, Zecheng Wang, Na Ming, Liyuan Guo
Summary: In this paper, a tunable ring cavity terahertz parametric oscillator with fixed output direction is presented. The diamond-shaped Stokes beam resonator and reflection mirrors are used to adjust the propagation direction of the Stokes and pump beams, respectively. By controlling the cooperative propagation directions of the pump and Stokes beams, the terahertz wave output direction can always be normal to the output surface within the frequency tuning range of 1.4-2.4 THz.
APPLIED PHYSICS B-LASERS AND OPTICS
(2022)
Article
Engineering, Electrical & Electronic
Yanjuan Wang, Si Chen, Qiuyan Sheng, Hao Sun, Zhipeng Ding, Cheng Lu, Guomei Wang, Huanian Zhang, Shenggui Fu, Xiaohan Chen, Wenfei Zhang, Fang Zhang
Summary: Pb3Sn4FeSb2S14, a novel two-dimensional layered material, exhibits excellent properties and air stability. In this study, an erbium-doped fiber laser was successfully fabricated using Pb3Sn4FeSb2S14 as a saturable absorber, demonstrating its effective modulation for bright-dark-bright pulsed laser output.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Optics
Chenxi Zhang, Xiaohui Li, Enci Chen, Haoran Liu, Perry Ping Shum, Xiao-han Chen
Summary: This study focuses on dissipative soliton pulses generated by a nonlinear photonics absorption device based on hydrazone organics, compressing the pulses to near the transformation limit through dispersion control. Experimental results demonstrate that the transport properties of dissipative solitons are different from traditional optical pulses, and additional anomalous dispersion fibers can produce dissipative noise-like soliton pulses.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Yunqi Tang, Chun Hong Mak, Jun Zhang, Guohua Jia, Kuan-Chen Cheng, Haisheng Song, Mingjian Yuan, Shijun Zhao, Ji-Jung Kai, Juan Carlos Colmenares, Hsien-Yi Hsu
Summary: An environmentally friendly mixed-halide perovskite with a bandgap funnel structure has been developed and its dynamic interfacial interactions in the photoelectrochemical system have been studied. The results show that the mixed-halide perovskite has more efficient electron transport and charge transfer, leading to improved photoelectrochemical hydrogen production.
ADVANCED MATERIALS
(2023)
Article
Optics
Shuo Sun, Fuhao Yang, Zhiqi Sui, Mingxiao Zhu, Si Chen, Yanjuan Wang, Zhifeng Hong, Wenfei Zhang, Shenggui Fu, Xiaohan Chen, Guomei Wang, Huanian Zhang
Summary: This study successfully prepared cylindrite nanosheets and studied their nonlinear optical absorption properties. Q-switched and mode-locked operations were achieved by adjusting dispersion management and intracavity net dispersion. The cylindrite-based optical modulator shows potential and feasibility in the field of ultrashort pulse fiber lasers.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Multidisciplinary
Chengxi Zhang, Jiayi Chen, Lyudmila Turyanska, Junhui Wang, Weihua Wang, Lin Wang, Lingmei Kong, Kaifeng Wu, Jisong Yao, Hongbin Yao, Zhiwen Yang, Wanwan Li, Yehonadav Bekenstein, Yue Wang, Guohua Jia, Xuyong Yang
Summary: This study demonstrates a method for fabricating zigzag CsPbBr3 perovskite nanocrystals through dipole-induced self-assembly. The dipole moment along the axis is found to be the driving force for the assembly of nanocubes into zigzag nanocrystals. The zigzag CsPbBr3 nanocrystals exhibit comparable optical properties to their nanocube counterparts and show potential for amplified spontaneous emission and lasing applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Bing Bai, Chengxi Zhang, Yongjiang Dou, Lingmei Kong, Lin Wang, Sheng Wang, Jun Li, Yi Zhou, Long Liu, Baiquan Liu, Xiaoyu Zhang, Ido Hadar, Yehonadav Bekenstein, Aixiang Wang, Zongyou Yin, Lyudmila Turyanska, Jochen Feldmann, Xuyong Yang, Guohua Jia
Summary: During the last decade, atomically flat 2D semiconductor nanoplatelets (NPLs) have made extensive breakthroughs in synthesis, growth mechanisms, optical and electronic properties, and practical applications. The unique optical properties, such as extremely narrow emission line width and high gain coefficient, make NPLs favorable for light-emitting applications. However, challenges related to heavy metal elements in NPLs and ambiguous gain mechanisms need to be addressed for widespread applications.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Lufa Li, Yaning Luo, Qianqian Wu, Lin Wang, Guohua Jia, Tao Chen, Chengxi Zhang, Xuyong Yang
Summary: In this study, an efficient and bright green indium phosphide (InP) quantum dot-based light-emitting diode (LED) was achieved by improving the charge transport at the interface through the introduction of a self-assembled monolayer of 4-bromo-2-fluorothiophenol (SAM-BFTP) molecule. The molecular dipole layer reduced the energy barrier of hole injection and suppressed fluorescence quenching. Copper ions doped into phosphomolybdic acid (Cu:PMA) were used as the hole injection layer (HIL), leading to a green InP quantum dot LED with a maximum external quantum efficiency (EQE) of 8.46% and a luminance of 18,356 cd/m2. This work is significant for the future development of high-efficiency and high-brightness InP-based quantum dot LEDs.
Review
Chemistry, Multidisciplinary
Long Liu, Bing Bai, Xuyong Yang, Zuliang Du, Guohua Jia
Summary: Heavy-metal-containing semiconductor nanocrystals (NCs) have unique optical and electrical properties, but the toxicity risks of heavy metals limit their applications. Anisotropic heavy-metal-free semiconductor NCs with lower toxicity and unique properties have been explored. This review provides an overview of the syntheses, properties, and applications of anisotropic heavy-metal-free semiconductor NCs, as well as the challenges and possible solutions in this field.
Article
Chemistry, Multidisciplinary
Ashley J. Mulder, Rhys D. Tilbury, Melissa V. Werrett, Phillip J. Wright, Payal Patel, Thomas Becker, Franca Jones, Stefano Stagni, Guohua Jia, Massimiliano Massi, Mark A. Buntine
Summary: This study reports on the effects of different N-donor ligands on the chemical composition and surface plasmon resonance (SPR) transition of copper nanoparticles (CuNPs) formed via laser ablation. Pyridines and alkylated tetrazoles showed minimal effects on the SPR transition, while the presence of tetrazoles resulted in a significant blue shift. This shift was attributed to the tetrazolate anions providing a reducing environment, preventing the formation of copper(II) oxides.
Article
Optics
Yongming Yang, Haoyuan Li, Qiongyu Hu, Haoxu Zhao, Bin Zhang, Jing Liu, Xiaohan Chen, Huanian Zhang, Ping Li
Summary: This paper introduces a new type of all-fiber mode-locked laser with a novel Sagnac loop structure and a tapered fiber coated with a two-dimensional layer ferromagnetic insulator Cr2Si2Te6 as a saturable absorber. The laser operates at a fundamental repetition frequency of 19.1 MHz with a signal-to-noise ratio of 62.5 dB and a central wavelength of 1561.0 nm when the pump power is 167.6 mW. It has a maximum output power of 8.9 mW and a minimum pulse width of 5.2 ps. The mutual interference of beams enhances the efficiency of the saturable absorber. The results indicate that this Er-doped fiber laser has great potential in nonlinear optics and ultrafast photonics.
JOURNAL OF OPTICS-INDIA
(2023)
Article
Electrochemistry
Zhuo Wang, Zhehao Sun, Hang Yin, Honghe Wei, Zicong Peng, Yoong Xin Pang, Guohua Jiac, Haitao Zhao, Cheng Heng Pang, Zongyou Yin
Summary: Researchers have made significant progress in the field of CO2RR by utilizing machine learning techniques, including accelerated catalyst property prediction, activity and selectivity prediction, guided catalyst and electrode design, and assisted experimental synthesis. These advancements contribute to a better understanding of CO2RR and play a role in achieving carbon neutrality.
Review
Criminology & Penology
Sorour Shahbazi, Thomas Becker, Guohua Jia, Simon W. Lewis
Summary: This article discusses the application of luminescent nanotechnology for enhanced visualization of latent fingermarks, specifically on multicolored, multipatterned, and luminescent substrates.
WILEY INTERDISCIPLINARY REVIEWS: FORENSIC SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Zhehao Sun, Hang Yin, Kaili Liu, Shuwen Cheng, Gang Kevin Li, Sibudjing Kawi, Haitao Zhao, Guohua Jia, Zongyou Yin
Summary: This review discusses the applications of machine learning in accelerating calculation and aiding electrocatalyst design. It presents methods of using machine learning to accelerate calculation and introduces its applications in electrocatalyst design. The opportunities and challenges for future design are also summarized.
