Prof. Xiong-jun Zhang Profile

Prof. Xiong-jun Zhang

at China Academy of Engineering Physics

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Author

Publications (9)

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 | 16 May 2012 Paper

Large aperture plasma electrodes Pockels cell for multi-pass amplified scheme of SGII upgrading laser

Dengsheng Wu, Feng Jing, Ping Li, Xiongjun Zhang, Jun Zhang, Xiaolin Tian

Proceedings Volume 8433, 84331W (2012) https://doi.org/10.1117/12.924631

KEYWORDS: Switching, Plasma, Electrodes, Resistance, Polarizers, National Ignition Facility, Pulsed laser operation, Oscilloscopes, Switches, Optical components

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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 | 4 September 2010 Paper

Single-pulse driven plasma Pockels cell with 350mmx350mm aperture

Xiongjun Zhang, Dengsheng Wu, Jun Zhang, Donghui Lin, Kuixing Zheng, Feng Jing

Proceedings Volume 7795, 77950H (2010) https://doi.org/10.1117/12.858854

KEYWORDS: Plasma, Crystals, Switching, Electrodes, Polarizers, Switches, National Ignition Facility, Optical amplifiers, Optical switching, Polarization

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Proceedings Article | 4 September 2010 Paper

Single-pulse driven plasma Pockels cell with 350mmx350mm aperture

Xiongjun Zhang, Dengsheng Wu, Jun Zhang, Donghui Lin, Kuixing Zheng, Feng Jing

Proceedings Volume 7795, 77950H (2010) https://doi.org/10.1117/12.858854

KEYWORDS: Plasma, Crystals, Switching, Electrodes, Polarizers, Switches, National Ignition Facility, Optical amplifiers, Optical switching, Polarization

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Proceedings Article | 8 January 2008 Paper

Compact plasma Pockels cell for TIL of SGIII laser facility

Xiongjun Zhang, Dengsheng Wu, Doughui Lin, Haiwu Yu, Jun Zhang

Proceedings Volume 6838, 68380Y (2008) https://doi.org/10.1117/12.755112

KEYWORDS: Switching, Plasma, Optical switching, Crystals, Electrodes, Polarizers, Nonlinear crystals, Pulsed laser operation, Optical amplifiers, Geometrical optics

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Proceedings Article | 15 September 2006 Paper

The effect of ultraviolet light on one-pulse process Pockels cell gas discharge

Deng-sheng Wu, Xiong-jun Zhang, Yun Dong, Xiao-jun Zhou, Xiao-lin Tian

Proceedings Volume 6287, 62870H (2006) https://doi.org/10.1117/12.683375

KEYWORDS: Ultraviolet radiation, Plasma, Electrons, Switching, Crystals, Electrodes, Ultraviolet sources, Resistors, Switches, Laser welding

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Proceedings Article | 26 January 2005 Paper

Research on 2x1 plasma electrode electro-optical switch with large aperture

Xiong Jun Zhang, Kui Xing Zheng, B. Feng, D. S. Wu, J. P. Lu, X. L. Tian, F. Jin, Zhan Sui, Xiaofeng Wei, Xiaomin Zhang

Proceedings Volume 5627, (2005) https://doi.org/10.1117/12.571992

KEYWORDS: Plasma, Switches, Electrodes, Electro optics, Switching, Crystals, Optical switching, Optical amplifiers, Pulse generators, Photodiodes

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In conceptual design of the prototype for SG-III facility, a full aperture electro-optical switch was placed between the cavity mirror and the main amplifier to isolate the reflected beams. The beam on the cavity mirror is 240mm×240mm square. Pockells cells of conversional design with coaxial ring electrodes can not scale to such large square aperture. In the 1980s, a plasma electrode Pockels cell (PEPC) concept was invented at LLNL. It uses transparent plasma electrode formed through gas discharge as the electrodes to apply the voltage across switching crystal to rotate the polarization of a transmitted laser beam. And it can be scaled to large aperture with thin crystal. So the switch which would be used in SG-III is based on this technology. The technical integration line as a prototype of SG-III laser is actually a 4×2 beam bundle. And the full aperture optical switch is mechanically designed four apertures as a removable unit, and electrically two 2×1 PEPC putting together. So we built a 2×1 PEPC to develop the technology first. The 2×1 PEPC is a sandwich structure made of an insulating mid plane between a pair of plasma chambers. The frame of both plasma chambers are machining in duralumin. Each chamber is installed with a planar magnetic cathode and four segments spherical anodes made from stainless steel. The cathode and anode are insulated from the housing with a special shell made from plastic, and plasma is insulated from the housing by an 80-μm-thick anodic coating on the duralumin. The two plasma chambers are separated by a mid plane of glass frame with two square holes. The two holes are filled by two electro-optical crystals with a 240-mm square aperture. With the optimized operating pressure and the electrical parameters, a very good homogeneity and low resistivity plasma electrode is obtained. Finally we tested its switching performance to simulate the case that it will be used in the SG-III prototype facility. It works with a quarter wave delay voltage and the laser beam passes through PEPC twice. The average switching efficiency across the entire aperture is greater than 98.6%, the rising time of the switch is about 83ns, and the transmission of the switch is 86%.

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