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Tomographic Imaging and Three-Dimensional Reconstruction Based on a High-Gain Optical Parametric Amplifier

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Chinese Physics Letters 2012年第5期29卷 144-146页

作者： YANG Jing DU Shi-Feng ZHANG Jing-Yuan CAO Dong cui da-fu PENG Qin-Jun XU Zu-Yan RCLPT Key Lab of Functional Crystal and Laser TechnologyTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190 Department of Physics Georgia Southern UniversityStatesboroGA 30460USA Graduate University of the Chinese Academy of Sciences Beijing 100190

Tomographic imaging and three-dimensional reconstruction based on a high-gain picosecond optical parametric amplifier (OPA) is demonstrated. More than 40dB intensity amplification of the image is achieved from the high-gain *** images of various longitudinal positions of the target are extracted by the gated nature of the OPA,then a three-dimensional (3-D) surface topography of the target is *** gated and high-gain property of the OPA allows tomographic optical imaging together with 3-D profile reconstruction of the target in turbid media.

关键词： amplifier optical topography

Polarized Infrared Spectra of Intersubband Transitions in GaAs/AlGaAs Step Multiquantum Wells

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Chinese Physics Letters 1996年第2期13卷 149-152页

作者： cui da-fu YUAN Zhen-yu CHEN Zheng-hao MA Jian-wei ZHOU Yue-liang LU Hui-bin HE Meng YANG Guo-zhen ZHANG Shu-de Institute of Physics Chinese Academy of SciencesBeijing 100080 Institute of Rock a.nd Mineral Analysis Beijing 100037

The polarization dependence of conduction inf ersubband transitions in GaAs/AlGaAs step *** well structures hasJbeen studied using infrared *** S-polarized 45°oblique angle incidence configuration with respect to sample surface normal,the transverse electric(TE)active intersubband transitions were *** transverse electric and transverse magnetic(TM)active intersubband transitions were obtained in P-polarized incidence at 45°angle on sample,which shows a small energy splitting between TE and TM absorption peaks.

关键词： spectroscopy. transitions transverse

Preparation and Characterization of the BaTiO_(3)/YBa_(2)Cu_(3)O_(7)/SrTiO_(3) Heteroepitaxial Films

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Chinese Physics Letters 1996年第10期13卷 775-778页

作者： MA Kun LI Chun-ling cui da-fu ZHOU Yue-liang LIU Yan-wei LÜHui-bin ZHANG dao-fan WU Fei CHEN Hong LI Lin National Laboratory for Superconductivity Institute of PhysicsChinese Academy of SciencesBeijing 100080 Institute of Physics Chinese Academy of SciencesBeijing 100080

BaTiO_(3)(BTO)/YBa_(2)Cu_(3)O_(7) (YBCO) heteroepitaxial films have been fabricated on (100) SrTiO_(3) substrates by pulsed laser ablation. X-ray characterizations show the BTO/YBCO bilayer films have a highly epitaxial nature. Rocking curves for the BTO (002) and YBCO (005) peaks have full width at half maximum values of 0.36°and 0.32°, respectively. The Ф scan plots indicate good in-plane alignments of these epitaxial films. The ferroelectric properties of the B TO/YBCO heteroepitaxial films were evaluated by capacitance-voltage measurement in metal-ferroelectric-metal configuration.

关键词： configuration. ferroelectric epitaxial

A Compact High Power Laser-Diode Side-Pumped Tm,Ho：YAG Laser Nearly at Room Temperature with Intracavity Tm：YAG Laser

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Chinese Physics Letters 2014年第4期31卷 54-56页

作者： ZHANG Chao DU Shi-Feng NIU Yan-Xiong WANG Cai-Li WANG Zhi-Chao XUJia-Lin BO Yong PENG Qin-Jun cui da-fu XU Zu-Yan ~chool of Instrument Science and Optoelectronic Engineering Beihang University Beijing 100189 Research Center for Laser Physics and Technology Key Lab of Functional Crystal and Laser Technology Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190

We report a compact high power Tm,Ho：YAG laser nearly at room temperature. The laser-diode side-pumped Tm：YAG and Tm,Ho：YAG laser modules are operated in the same cavity. The laser yields 37.34 W of continuous wave output power under the temperature of 6℃, corresponding to a maximum slope efficiency of 16.7% when the output power lies from 5.1 W to 27.0 W. This is the first report on the combined Tm：YAG and Tm,Ho：YAG lasers for obtaining high power 2.1 μm laser.

关键词： SEMICONDUCTOR lasers LASER pulses OPTICAL parametric oscillators PHOTONS THULIUM

Measurements of Film Thickness and Growth Temperature of YBa_(2)Cu_(3)O_(7-δ) Films by Pyrometric Absorption Method

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Chinese Physics Letters 1997年第5期14卷 367-370页

作者： XIONG Xu-ming ZHOU Yue-liang WANG Hui-sheng cui da-fu LU Hui-bin CHEN Zheng-hao YANG Guo-zhen Optical Physics Laboratory Institute of PhysicsChinese Academy of SciencesBeijing 100080

A pyrometric absorption method suitable for strongly absorbing films has been developed to monitor the YBa_(2)Cu_(3)O_(7-δ)film *** method makes use of the temperature difference between the heater and the *** deducing the absorption formula of radiation light and fitting it to the radiation intensity data measured,it is possible to monitor the film thickness and the film surface temperature during *** results show that this is a simple and practicable method.

关键词： deposition. film absorption

A 171.4 W Diode-Side-Pumped Q-Switched 2 μm Tm:YAG Laser with a 10 kHz Repetition Rate

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Chinese Physics Letters 2012年第4期29卷 104-107页

作者： CAO Dong DU Shi-Feng PENG Qin-Jun BO Yong XU Jia-Lin GUO Ya-Ding ZHANG Jing-Yuan cui da-fu XU Zu-Yan RCLPT Key Lab of Functional Crystal and Laser TechnologyTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190 Graduate University of the Chinese Academy of Sciences Beijing 100190

A 785 nm diode-side-pumped high-power high-pulse-repetition-frequency Q-switched 2 μm Tm:YAG laser system is *** a pump power of 1300 W,a 171.4 W average output power is achieved at a pulse repetition frequency of 10 *** our knowledge,this is the highest average output power for a diode-pumped all solid-state Q-switched 2 μm Tm:YAG *** laser output corresponds to an optical-to-optical conversion efficiency of 13.3% and a slope efficiency of 18.9%.

关键词： pumped switched power

Unit-Cell by Unit-Cell Epitaxial Growth of SrTiO_(3) and BaTiO_(3) Thin Films by Laser Molecular Beam Epitaxy

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Chinese Physics Letters 1997年第6期14卷 478-480页

作者： YANG Guo-zhen LÜ Hui-bin WANG Hui-sheng cui da-fu YANG Hai-qing WANG Hua ZHOU Yue-liang CHEN Zheng-hao Laboratory of Optical Physics Chinese Academy of SciencesBeijing 100080 Institute of Physics Chinese Academy of SciencesBeijing 100080 Centre for Condensed Matter Physics Chinese Academy of SciencesBeijing 100080

Atomically regulated unit-cell by unit-cell homoepitaxial SrTiO_(3) and heteroepitaxial BaTiO_(3) films were fabricated on SrTiO_(3)(100)substrates by laser molecular beam *** fine streak patterns and more than 1000 cycles undamping intensity oscillation were obtained by in situ reflection high-energy electron diffraction with precisely controlled intermittence between each unit-cell *** surface morphology of the films was examined by atomic force *** root-mean-square surface roughness of the films is about 0.1 nm.

关键词： layer. roughness oscillation

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剪式压电微喷的设计及分析

压电与声光 2006年第4期28卷 397-399页

作者：许立宁崔大付中国科学院电子学研究所传感技术国家重点实验室北京100080

利用压电陶瓷的厚度切变振动,设计出一种新型微喷。介绍了它的结构、工作方式及驱动方法。用弹性薄板模型对微喷进行理论分析,推导出振动位移函数,估算了自由振动基频和受迫振动端部位移。用有限元软件模拟振动模态,其模拟结果与理论计... 详细信息

利用压电陶瓷的厚度切变振动,设计出一种新型微喷。介绍了它的结构、工作方式及驱动方法。用弹性薄板模型对微喷进行理论分析,推导出振动位移函数,估算了自由振动基频和受迫振动端部位移。用有限元软件模拟振动模态,其模拟结果与理论计算接近。使用微电子及微电子机械系统(MEMS)工艺,在国内首次制备出该类型微喷,加载驱动波形后达到喷射效果。

关键词：剪式压电微喷切变振动

High Efficiency Multi-kW Diode-Side-Pumped Nd：YAG Laser with Reduced Thermal Effect

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Chinese Physics Letters 2010年第2期27卷 83-85页

作者：徐一汀许家林崔前进谢仕永鲁远甫薄勇彭钦军崔大复许祖彦 Laboratory of Optical Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 RCLPT Key Lab of Functional Crystal and Laser Technology Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 Graduate School of the Chinese Academy of Sciences Beijing 100049

We demonstrate a high efficiency multi-kW diode-side-pumped Nd：YAG laser. High cooling efficiency of the diode-side-pumped module in the laser is achieved. The middle portion of the Nd：YAG rod in the module is cooled by a coolant jet with screwed side surface, and the end-caps of the rod without screwed side surface are cooled by Au coated on the surface. The thermal effect of the laser rod is reduced, which leads to high output power with high optical-optical conversion efficiency. By using three identical Nd：YAG laser modules, an output power of 4.2 kW and beam quality of 58 mm＆#12539;mrad with an optical-optical efficiency of 35% at 1064 nm is obtained in a laser oscillator. By using four identical Nd：YAG laser modules, an output power of 3.1 kW and beam quality of 17 mm＆#12539;mrad with an optical-optical efficiency of 25.8% is demonstrated in a master oscillator power-amplifier system.

关键词： Optics quantum optics and lasers