Prof. Kai Zhong Profile

Prof. Kai Zhong

Dr. at Tianjin Univ

SPIE Involvement:

Author

Publications (50)

Proceedings Article | 28 November 2023 Paper

A novel Rayleigh lidar signal denoising algorithm for far-field noise suppression and high-accuracy retrieval

Tong Wu, Degang Xu, Kai Zhong, Xianzhong Zhang, Xinqi Li, Xiaojian Zhang, Jianquan Yao

Proceedings Volume 12772, 1277205 (2023) https://doi.org/10.1117/12.2687008

KEYWORDS: Denoising, LIDAR, Signal to noise ratio, Modal decomposition, Signal processing, Mathematical optimization

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Proceedings Article | 27 November 2023 Paper

Pulse-jitter reduction in passively Q-switched Nd:YAG/Cr:YAG microchip lasers by injection seeding actively Q-switched laser pulses

Jing Chi, Kai Zhong, Hongzhan Qiao, Yue Sun, Fangjie Li, Yizhe Zheng, Xinqi Li, Yuxin Liu, Degang Xu, Jianquan Yao

Proceedings Volume 12760, 1276009 (2023) https://doi.org/10.1117/12.2687190

KEYWORDS: Q switched lasers, Pulsed laser operation, Pulse signals, Nanosecond lasers, Transmittance, Electro optics

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Proceedings Article | 27 November 2023 Paper

Polarization self-modulation of the coaxial diode-end-pumped orthogonally polarized laser induced by an intracavity waveplate

Yizhe Zheng, Kai Zhong, Hongzhan Qiao, Xianzhong Zhang, Fangjie Li, Tana Gegen, Xinqi Li, Jing Chi, Yuxin Liu, Jining Li, Degang Xu, Jianquan Yao

Proceedings Volume 12760, 1276005 (2023) https://doi.org/10.1117/12.2687334

KEYWORDS: Polarization, Semiconductor lasers, Wave plates, Neodymium lasers, Physical coherence, Q switched lasers, Precision measurement, Polarization control, Optical resonators, Matrices

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Proceedings Article | 27 November 2023 Paper

Simulation of the transient thermal effect for end-pumped Nd: YAG crystals operation at the repetition rate of 1 kHz

Yue Sun, Kai Chen, Shuai Liu, Jing Chi, Kai Zhong, Yuye Wang, Jining Li, Degang Xu, Jianquan Yao

Proceedings Volume 12760, 1276008 (2023) https://doi.org/10.1117/12.2687136

KEYWORDS: Crystals, Thermal effects, Neodymium, Nd:YAG lasers, Fused deposition modeling, Composites, Semiconductor lasers, Laser crystals, 3D modeling, YAG lasers

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Proceedings Article | 27 November 2023 Paper

Confidence interval guided single photon LiDAR depth imaging

Jiying Chang, Jining Li, Rui Yu, Kai Chen, Yuye Wang, Kai Zhong, Degang Xu, Jianquan Yao

Proceedings Volume 12767, 127670G (2023) https://doi.org/10.1117/12.2688934

KEYWORDS: Image restoration, LIDAR, Image segmentation, Statistical analysis, Reconstruction algorithms, Time of flight imaging, Signal intensity, Scanning probe lithography, Interference (communication), Image processing algorithms and systems

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Proceedings Article | 27 November 2023 Paper

Evaluation of atmospheric temperature uncertainty caused by platform attitude fluctuation

Xinqi Li, Kai Zhong, Xianzhong Zhang, Tong Wu, Yizhe Zheng, Jing Chi, Degang Xu, Jianquan Yao

Proceedings Volume 12769, 127690Y (2023) https://doi.org/10.1117/12.2687184

KEYWORDS: Air temperature, LIDAR, Atmospheric sensing, Monte Carlo methods, Measurement uncertainty, Temperature metrology, Statistical analysis, Atmospheric modeling

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SPIE Journal Paper | 31 March 2023

Compact and highly stable electro-optic Q-switched laser at 1064 nm based on a composite YAG/Nd:YAG crystal

Yue Sun, Kai Zhong, Chao Yan, Kai Chen, Shuai Liu, Hongzhan Qiao, Xianzhong Zhang, Yizhe Zheng, Degang Xu, Yuye Wang, Jining Li, Jianquan Yao

OE, Vol. 62, Issue 03, 036111, (March 2023) https://doi.org/10.1117/12.10.1117/1.OE.62.3.036111

KEYWORDS: Q switched lasers, Pulsed laser operation, Nd:YAG lasers, Laser crystals, Crystals, Electro optics, Q switches, Pulse signals, LIDAR, Beam divergence

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Proceedings Article | 4 January 2023 Poster + Paper

Study of broadband second harmonic generation based on random quasi-phase matching

Sijia Wang, Kai Zhong, Fangjie Li, Hongzhan Qiao, Xianzhong Zhang, Yizhe Zheng, Xinqi Li, Tana Gegen, Jining Li, Degang Xu, Jianquan Yao

Proceedings Volume 12323, 1232308 (2023) https://doi.org/10.1117/12.2642211

KEYWORDS: Second-harmonic generation, Harmonic generation, Crystals, Fourier transforms, Statistical modeling, Mathematical modeling

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Proceedings Article | 28 December 2022 Presentation + Paper

Study on pulse jitter of passively Q-switched Nd:YAG/Cr:YAG microchip laser

Hongzhan Qiao, Kai Zhong, Fangjie Li, Xianzhong Zhang, Sijia Wang, Yizhe Zheng, Tana Gegen, Xinqi Li, Degang Xu, Jianquan Yao

Proceedings Volume 12310, 123100F (2022) https://doi.org/10.1117/12.2642087

KEYWORDS: Q switched lasers, Pulsed laser operation, Crystals, Q switches, Optical simulations

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Proceedings Article | 28 December 2022 Presentation + Paper

Gain-self-balanced coaxial-end-pumped orthogonally polarized laser with high coherence and good beam quality

Yizhe Zheng, Kai Zhong, Hongzhan Qiao, Xianzhong Zhang, Fangjie Li, Sijia Wang, Tana Gegen, Xinqi Li, Degang Xu, Jianquan Yao

Proceedings Volume 12310, 123100X (2022) https://doi.org/10.1117/12.2642092

KEYWORDS: Polarization, Mode locking, Crystals, Wave plates, Thermal effects, Switching, Prisms, Laser crystals, Optical testing, Neodymium lasers

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Proceedings Article | 28 December 2022 Presentation + Paper

A passively Q-switched dual-wavelength laser with pulsed LD coaxial end-pumped configuration

Xianzhong Zhang, Kai Zhong, Hongzhan Qiao, Yizhe Zheng, Fangjie Li, Degang Xu, Jianquan Yao

Proceedings Volume 12310, 123100C (2022) https://doi.org/10.1117/12.2641747

KEYWORDS: Pulsed laser operation, Q switched lasers, Laser crystals, Crystals, Optical pumping, Q switches, Optical simulations

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Proceedings Article | 19 December 2022 Presentation + Paper

Evaluation of atmospheric temperature measurement uncertainty of a Rayleigh scattering lidar by the GUM method

Xinqi Li, Kai Zhong, Xianzhong Zhang, Yijian Zhang, Yu Wang, Degang Xu, Jianquan Yao

Proceedings Volume 12319, 123190E (2022) https://doi.org/10.1117/12.2642115

KEYWORDS: LIDAR, Atmospheric sensing, Atmospheric modeling, Temperature metrology, Measurement uncertainty, Rayleigh scattering

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Proceedings Article | 16 December 2022 Presentation + Paper

Perfect phase matching regulation in cubic semiconductors based on linear electro-optic effect

Fangjie Li, Kai Zhong, Hongzhan Qiao, Xianzhong Zhang, Degang Xu, Jianquan Yao

Proceedings Volume 12324, 123240D (2022) https://doi.org/10.1117/12.2642113

KEYWORDS: Crystals, Phase modulation, Nonlinear crystals, Terahertz radiation, Refractive index, Polarization, Difference frequency generation, Electro optics, Birefringence, Modulation

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Proceedings Article | 16 December 2022 Presentation + Paper

Wideband one-dimensional range profiles of Lambertian reflectors in the terahertz range

Tana Gegen, Kai Zhong, Hongzhan Qiao, Xianzhong Zhang, Wei He, Jining Li, Degang Xu, Jianquan Yao

Proceedings Volume 12324, 123240I (2022) https://doi.org/10.1117/12.2642102

KEYWORDS: Optical spheres, Scattering, Reflectors, Picosecond phenomena, Radar, Laser scattering, Terahertz radiation, Backscatter, Transmitters, Superposition

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Proceedings Article | 9 October 2021 Poster + Paper

High-peak-power, high-efficiency, widely tunable sub-nanosecond optical parametric generator based on PPMgLN

Hongzhan Qiao, Kai Zhong, Fangjie Li, Xianzhong Zhang, Sijia Wang, Yizhe Wang, Quan Sheng, Wei Shi, Degang Xu, Jianquan Yao

Proceedings Volume 11905, 119050R (2021) https://doi.org/10.1117/12.2599194

KEYWORDS: Crystals, Picosecond phenomena, Continuous wave operation, Semiconductor lasers, Laser crystals, Wavelength tuning, Optical testing, Nd:YAG lasers, Q switched lasers, Optical pumping

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Proceedings Article | 9 October 2021 Poster + Paper

Widely tunable eye-safe optical parametric oscillation in an x-cut KTP crystal with noncollinear confocal pumping

Fangjie Li, Kai Zhong, Hongzhan Qiao, Xianzhong Zhang, Degang Xu, Jianquan Yao

Proceedings Volume 11905, 1190510 (2021) https://doi.org/10.1117/12.2600686

KEYWORDS: Optical parametric oscillators, Ferroelectric materials, Crystals, Wavelength tuning, Nonlinear crystals, Mirrors, Scanners, Nd:YAG lasers, Laser crystals, Energy efficiency

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Proceedings Article | 9 October 2021 Paper

Difference frequency generation of widely tunable terahertz waves in 4H-SiC

Tana Gegen, Fangjie Li, Kai Zhong, Hongzhan Qiao, Xianzhong Zhang, Degang Xu, Jianquan Yao

Proceedings Volume 11906, 119060H (2021) https://doi.org/10.1117/12.2599413

KEYWORDS: Terahertz radiation, Silicon carbide, Nonlinear crystals, Polarization, Absorption, Difference frequency generation, Laser damage threshold, Nonlinear optics

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Proceedings Article | 9 October 2021 Poster + Paper

Fourier transform analysis on random quasi-phase matching problems

Sijia Wang, Kai Zhong, Kefei Liu, Jiawei Li, Degang Xu, Jianquan Yao

Proceedings Volume 11905, 119050Q (2021) https://doi.org/10.1117/12.2598970

KEYWORDS: Second-harmonic generation, Fourier transforms, Nonlinear crystals, Crystals, Spatial frequencies, Phase matching, Nonlinear optics

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Proceedings Article | 9 October 2021 Poster + Paper

A dual-wavelength laser at 1064 nm and 1080 nm with tunable power ratio by varying the pump wavelength

Xianzhong Zhang, Kai Zhong, Hongzhan Qiao, Yizhe Zheng, Fangjie Li, Degang Xu, Jianquan Yao

Proceedings Volume 11890, 1189010 (2021) https://doi.org/10.1117/12.2599587

KEYWORDS: Laser crystals, Crystals, Continuous wave operation, Absorption, Optical simulations, Optical pumping, Semiconductor lasers, Nd:YAG lasers, Laser applications

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Proceedings Article | 9 October 2021 Paper

Thermal effects of diode-end-pumped dual-wavelength solid-state lasers with coaxially arranged dual laser crystals

Yizhe Zheng, Kai Zhong, Kefei Liu, Hongzhan Qiao, Xianzhong Zhang, Degang Xu, Jianquan Yao

Proceedings Volume 11890, 118900W (2021) https://doi.org/10.1117/12.2601082

KEYWORDS: Crystals, Thermal effects, Laser crystals, Neodymium lasers, Absorption, Solid state lasers

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SPIE Journal Paper | 10 August 2021

Theory and experiments of a power-ratio tunable dual-wavelength Nd:YVO₄/Nd:GdVO₄ laser by varying the pump wavelength

Xianzhong Zhang, Kai Zhong, Hongzhan Qiao, Yizhe Zheng, Fangjie Li, Degang Xu, Jianquan Yao

OE, Vol. 60, Issue 08, 086103, (August 2021) https://doi.org/10.1117/12.10.1117/1.OE.60.8.086103

KEYWORDS: Crystals, Laser crystals, Absorption, Continuous wave operation, Semiconductor lasers, Tunable lasers, Optical pumping, Optical engineering, Optical simulations, Neodymium

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Proceedings Article | 28 February 2021 Paper

Development of key parameters metrology and calibration equipment for medical laser therapy apparatus

Liangcheng Duan, Wenli Liu, Zhixiong Hu, Baozhong Xu, Fubao Wu, Jiayi Yang, Kai Zhong, Jianquan Yao

Proceedings Volume 11781, 117810R (2021) https://doi.org/10.1117/12.2591724

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