Dr. Jian-Gang Zheng Profile

Dr. Jian-Gang Zheng

Associate Professor at China Academy of Engineering Physics

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Author

Publications (11)

Proceedings Article | 16 December 2022 Paper

Phase change cooling technology of an active mirror amplifier with high thermal conductivity composites

Kaibo Xiao, Xinying Jiang, Xiongwei Yan, Ting Shao, Qiao Xue, Jun Zhang, Song Gao, Jiangang Zheng, Wanguo Zheng

Proceedings Volume 12501, 125011K (2022) https://doi.org/10.1117/12.2656682

KEYWORDS: Amplifiers, Temperature distribution, 3D modeling, Thermal modeling

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Proceedings Article | 17 April 2020 Paper

Experimental investigation of laser diode side-pumped ultra-short pulse regenerative amplifier

Minqiang Kang, Ying Deng, Xiongwei Yan, Yongqiang Zou, Jing Yan, Xiangjun Xiang, Jianbin Li, Kaibo Xiao, Song Zhou, Fan Zhang, Xinying Jiang, Degui Wang, Chongbing Qu, Jun Tang, Jiangang Zheng, Jingqin Su, Kuixing Zheng, Qihua Zhu

Proceedings Volume 11455, 1145548 (2020) https://doi.org/10.1117/12.2564842

KEYWORDS: Pulsed laser operation, Semiconductor lasers, Amplifiers, Mirrors, Mode locking, Electro optics, Switches, Optical amplifiers, Fusion energy, Nd:YAG lasers

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Proceedings Article | 18 December 2019 Paper

LD end-pumped 12J-10Hz Nd:YAG pulse laser

Xinying Jiang, Zhenguo Wang, Xiongwei Yan, Qiao Xue, Wanjun Dai, Wenlong Wu, Ke Yao, Fan Zhang, Jiangang Zheng, Jingqin Su, Kuixing Zheng, Qihua Zhu, Wanguo Zheng

Proceedings Volume 11333, 113330M (2019) https://doi.org/10.1117/12.2543001

KEYWORDS: Amplifiers, Nd:YAG lasers, Fusion energy, Laser stabilization, Crystals, Pulsed laser operation, Laser systems engineering, Laser applications, Monochromatic aberrations, Laser energy

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Proceedings Article | 9 June 2017 Presentation

10J water-cooled DPSSL system based on Yb:YAG crystal edge-cladded by Cr:YAG ceramics (Conference Presentation)

Jian-Gang Zheng, Xiongwei Yan, Xinying Jiang, Zhenguo Wang, Mingzhong Li, Jun Zhang, Qihua Zhu, Wanguo Zheng

Proceedings Volume 10238, 1023807 (2017) https://doi.org/10.1117/12.2265010

KEYWORDS: Crystals, Ceramics, Cladding, Optical amplifiers, Fusion energy, Absorption, Laser systems engineering, Laser energy, Cryogenics, Laser scattering

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Laser Inertial Fusion Energy (IFE) has been attracting the interests of the researchers around the world, because of the promising to the future energy. The Yb:YAG was broadly used in the research field of high-peak power and large energy laser with repetition-rate for IFE because of its outstanding performance, including significant thermal and mechanical capacities, long upper energy level lifetime, high quantum efficiency and highly doping capacity. But it exhibits high saturation fluence at room temperature because of the small emission and absorption cross-section. And at the same time this gain material exhibits self-absorption of laser because of the thermal population at lower laser level at room temperature. Ant it appears to have been solved by means of the cryogenic temperature, but the total efficiency of the laser system will be decreased as the use of cryogenic temperature. The amplified spontaneous emission (ASE) effect of the amplifier can be relaxed by means of edge-cladded absorption material. And the difficulties of edge cladding can be will solved as the emergence of ceramics. But at present the ceramics exhibits high scattering and many disfigurements, which limited the application in the high-power large-energy laser system. So the edge-cladding of Yb:YAG crystal will be a key issue for solution the ASE in amplifier. In this paper, we will introduce a 10J water-cooled DPSSL system, based on Yb:YAG crystal at room temperature. In this system a new edge cladding method has been used, that the Yb:YAG crystal was edge cladded by Cr:YAG ceramics, which was used as the absorption material of ASE. The amplifier was an active mirror water-cooled room temperature amplifier. With the help of this edge cladding the ASE has been lowered, and about 5 times small signal gain has been obtained in a single pass amplification, which was much higher than the earlier of 2 times. And the wavefront aberrance of the laser beam was also reduced due to the thermal equilibrium between the edge cladding and the gain region. the amplifiers can be stably operated under 10Hz. Finally the output of the laser system was about 7.15J@10Hz and 10.8J@1-2Hz. The total optical-to-optical efficiency was about 8.3% for 1-2Hz (under the condition of 120kW/1ms pumping, 880mJ input and 10.8J output) and 5.6% for 10Hz.

SPIE Journal Paper | 21 April 2016

Modeling of the performance of a cryogenic gas cooled Yb:YAG multislab amplifier with a longitudinal doping gradient concentration

Kaibo Xiao, Xiaodong Yuan, Xiongwei Yan, Min Li, Xinying Jiang, Zhenguo Wang, Mingzhong Li, Wanguo Zheng, Jiangang Zheng

OE, Vol. 55, Issue 04, 046109, (April 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.4.046109

KEYWORDS: Optical amplifiers, Doping, Cryogenics, Fusion energy, Ytterbium, Performance modeling, Energy efficiency, Absorption, Ions, YAG lasers

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Proceedings Article | 26 January 2016 Paper

A unidirectional two-pulse amplifying architecture for laser fusion facilities

Min Li, Xiaomin Zhang, Wenyi Wang, Zhenguo Wang, Xiongwei Yan, Xinying Jiang, Jiangang Zheng, Mingzhong Li

Proceedings Volume 9796, 97962D (2016) https://doi.org/10.1117/12.2228531

KEYWORDS: Fusion energy, Laser amplifiers, High power diode lasers, Optical amplifiers, Pulsed laser operation, Laser systems engineering, Switches, Amplifiers, Reliability, Physics, High power lasers

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Proceedings Article | 3 February 2015 Paper

Development of large-aperture electro-optical switch for high power laser at CAEP

Xiongjun Zhang, Dengsheng Wu, Jun Zhang, Donghui Lin, Jiangang Zheng, Kuixing Zheng

Proceedings Volume 9255, 92550G (2015) https://doi.org/10.1117/12.2065224

KEYWORDS: Plasma, Crystals, Switches, Electro optics, Electrodes, National Ignition Facility, Laser crystals, High power lasers, Reliability, Laser welding

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Proceedings Article | 9 December 2014 Paper

Single-pulse driven, large-aperture 2x1 array plasma-electrodes optical switch for SG-II upgrading facility

Jun Zhang, Dengsheng Wu, Jiangang Zheng, Kuixing Zheng, Qihua Zhu, Xiongjun Zhang

Proceedings Volume 9294, 92940N (2014) https://doi.org/10.1117/12.2073019

KEYWORDS: Switching, Optical switching, Plasma, Electrodes, Pulsed laser operation, Switches, Pulse generators, Neon, Electro optics, Crystals

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Proceedings Article | 9 June 2011 Paper

Suppression of ASE using the co-doping technology

Jiangang Zheng, Xiongwei Yan, Xinying Jiang, Zhenguo Wang, Wentao Duan, Mingzhong Li

Proceedings Volume 8080, 80800S (2011) https://doi.org/10.1117/12.887327

KEYWORDS: Amplifiers, Crystals, Chromium, Laser crystals, Absorption, Optical amplifiers, Fusion energy, Ions, Ytterbium, Saturable absorption

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Proceedings Article | 19 February 2011 Paper

Progress of rep-rate plasma Pockels cell technology in RCLF

Xiongjun Zhang, Jun Zhang, Dengsheng Wu, Jiangang Zheng, Mingzhong Li, Kuixing Zheng, Jingqin Su, Feng Jing

Proceedings Volume 7916, 79160X (2011) https://doi.org/10.1117/12.876549

KEYWORDS: Crystals, Plasma, Sapphire, Laser crystals, Electro optics, Electrodes, Switches, Thermal effects, Absorption, Switching

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Proceedings Article | 17 November 2010 Paper

Suppression of transverse stimulated Raman scattering or transverse stimulated Brillouin scattering

Yongliang Zhang, Haixian Ye, Xiongwei Yan, Mingzhe Wang, Xinying Jiang, Zhenguo Wang, Jiangang Zheng, Mingzhong Li, Feng Jing, Xiaofeng Wei

Proceedings Volume 7843, 78432A (2010) https://doi.org/10.1117/12.882424

KEYWORDS: Reflectivity, Raman scattering, Crystals, Scattering, Reflection, Laser scattering, Refractive index, High power lasers, Convection, Fusion energy

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Showing 5 of 11 publications

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