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The Threshold and Modes of the End-pumped Solid-state Laser

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Chinese Journal of Lasers 1999年第1期 12-15页

作者： LIU Ning LIU Songhao LIAO Changjun XU Wencheng (Institute of quantum Electronics, south china normal university, {2., china)

１ＩｎｔｒｏｄｕｃｔｉｏｎＬａｓｅｒｄｉｏｄｅｐｕｍｐｅｄｓｏｌｉｄｓｔａｔｅｌａｓｅｒｓａｒｅｏｆｈｉｇｈｅｆｉｃｉｅｎｃｙ，ｃｏｍｐａｃｔｎｅｓ，ａｎｄｒｅｌｉａｂｉｌｉｔｙ，ｅｓｐｅｃｉａｌｙｉｎａｎｅｎ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＬａｓｅｒｄｉｏｄｅｐｕｍｐｅｄｓｏｌｉｄｓｔａｔｅｌａｓｅｒｓａｒｅｏｆｈｉｇｈｅｆｉｃｉｅｎｃｙ，ｃｏｍｐａｃｔｎｅｓ，ａｎｄｒｅｌｉａｂｉｌｉｔｙ，ｅｓｐｅｃｉａｌｙｉｎａｎｅｎｄｐｕｍｐｉｎｇｃｏｎｆｉｇｕｒ...

关键词： solid state laser end pump mode threshold

Femtosecond　soliton　generation　induced　by　intrapulse　stimulated　Raman　scattering　in　optical　fibers

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Chinese Journal of Lasers 1994年第3期 249-256页

作者： CAO Wenhua LIAO Changjun GUO Qi ZHANG You LIU Songhao(Institufe of quantum Electronics,south china normal university, {2.)

ＦｅｍｔｏｓｅｃｏｎｄｓｏｌｉｔｏｎｇｅｎｅｒａｔｉｏｎｉｎｄｕｃｅｄｂｙｉｎｔｒａｐｕｌｓｅｓｔｉｍｕｌａｔｅｄＲａｍａｎｓｃａｔｔｅｒｉｎｇｉｎｏｐｔｉｃａｌｆｉｂｅｒｓＣＡＯＷｅｎｈｕａ；ＬＩＡＯＣｈａｎｇｊｕ... 详细信息

ＦｅｍｔｏｓｅｃｏｎｄｓｏｌｉｔｏｎｇｅｎｅｒａｔｉｏｎｉｎｄｕｃｅｄｂｙｉｎｔｒａｐｕｌｓｅｓｔｉｍｕｌａｔｅｄＲａｍａｎｓｃａｔｔｅｒｉｎｇｉｎｏｐｔｉｃａｌｆｉｂｅｒｓＣＡＯＷｅｎｈｕａ；ＬＩＡＯＣｈａｎｇｊｕｎ；ＧＵＯＱｉ；ＺＨＡＮＧＹｏｕ；...

关键词： single-mode fibers intrapulse stimulated Raman scattering fundamental soliton.

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原子激光传输的有效ABCD形式研究

物理学报 2004年第2期53卷 356-361页

作者：殷建玲刘承宜杨友源刘江范广涵华南师范大学激光运动医学实验室广州510631 香港教育学院科学系华南师范大学信息光电子科技学院广州510631

利用含适量子系统传播子的ABCD形式的理论 ,将品质因子守恒系统中的ABCD定律 ,推广到有效品质因子守恒的系统———原子激光的传输中 ,通过引入有效品质因子和有效参数qeff,利用Heisenberg图像得到传播子的有效ABCD形式 .由于原子激光... 详细信息

利用含适量子系统传播子的ABCD形式的理论 ,将品质因子守恒系统中的ABCD定律 ,推广到有效品质因子守恒的系统———原子激光的传输中 ,通过引入有效品质因子和有效参数qeff,利用Heisenberg图像得到传播子的有效ABCD形式 .由于原子激光内部原子间相互作用的存在 ,原有的品质因子不再守恒。

关键词：原子激光传输有效ABCD参数传播子品质因子守恒系统原子激光器量子力学薛定谔方程

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强激光束在等离子体通道中传输的变分法研究

物理学报 2004年第5期53卷 1419-1424页

作者：刘明伟郭弘邓冬梅张宇陈徐宗华南师范大学传输光学实验室广州510631 北京大学信息科学技术学院量子信息与测量教育部重点实验室北京100871

给出了低密度等离子体中包含高阶相对论效应的激光场传输方程 .用变分法研究了强激光束在等离子体通道中传输时包括真空衍射、等离子体通道和低阶与高阶相对论效应对传输的影响 .在傍轴近似下 ,激光束宽依然有“势阱”方程 .当激光强度... 详细信息

给出了低密度等离子体中包含高阶相对论效应的激光场传输方程 .用变分法研究了强激光束在等离子体通道中传输时包括真空衍射、等离子体通道和低阶与高阶相对论效应对传输的影响 .在傍轴近似下 ,激光束宽依然有“势阱”方程 .当激光强度较大时 ,高阶相对论效应变得重要 :它一方面减小激光束宽的振荡幅度 ,另一方面又加快激光束宽的振荡速度 .当激光功率大于 (等于 )相对论临界功率时 ,高阶相对论效应避免了激光强度随传输距离出现无穷大的奇异性 .同时 ,给出了考虑高阶相对论效应后激光束宽平衡解的存在条件 .

关键词：等离子体通道变分法高阶相对论激光束真空衍射傍轴近似

Efficient generation of two-dimensional cluster states in a cavity QED

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Chinese Physics B 2013年第4期22卷 124-127页

作者：张刚周建薛正远 Machinery and Electronics Engineering Institute West Anhui University Anhui Xinhua university Laboratory of quantum Information Technology and School of Physics and Telecommunication Engineering South China Normal University

We propose a scheme to achieve a kind of nontrivial multipartite pair-wise controlled phase operation in a cavity QED setup. The operation implemented is of geometrical nature and is not sensitive to the thermal state of the cavity. In particular, we have managed to avoid the conventional dispersive coupling so that high speed gate operation is achieved which is very important in view of decoherence. We show that this multipartite pair-wise controlled phase operation makes the generation of two-dimensional cluster states very efficient.

关键词： controlled phase gate cluster state cavity QED

Simple and Efficient Password-Based Authenticated Key Exchange Protocol

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Journal of Shanghai Jiaotong university(Science) 2011年第4期16卷 459-465页

作者：王立斌潘嘉昕马昌社 School of Computer South China Normal University

Password-based authenticated key exchange(PAKE) protocols are cryptographic primitives which enable two entities,who only share a memorable password,to identify each other and to communicate over a public unreliable network with a secure session *** this paper,we propose a simple,efficient and provably secure PAKE protocol based on Diffie-Hellman key exchange and cryptographic hash *** protocol is secure against dictionary *** security is proved based on the hardness of the computational Diffie-Hellman problem in the random oracle model.

关键词： password authentication key exchange provable security

Analysis of the Crosstalk in WDM Systems Caused by Cross-phase Modulation in Erbium-doped Fiber Amplifiers

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Chinese Journal of Lasers 2001年第5期 41-45页

作者： LIU Ning LIAO Changjun LIU Songhao GUO Qi XU Wengchen (Institute of quantum Electronics, south china normal university, {2., china)

The crosstalk in WDM systems caused by cross phase modulation (XPM) in erbium doped fiber amplifiers(EDFA) was studied analytically. The results confirm that the EDFA induced phase shift does cause crosstalk in WDM systems. The crosstalk between two channels both with modulated pulse signals is studied for the first time. It was found that the EDFA induced phase shift will cause serious deterioration of the eye diagram when the optical signals continue to travel in the normal dispersion regime of the transmission fiber, while in the anomalous dispersion regime this phase shift will not cause much deterioration of the eye diagram.

关键词： optical fiber amplifier optical communication cross phase modulation WDM

First-principles calculations and experimental studies of Sn-Zn alloys as negative electrode materials for lithium-ion batteries

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Rare Metals 2011年第2期30卷 160-165页

作者： RU Qiang PENG Wei ZHANG Zhiwen HU Shejun LI Yanling Laboratory of quantum Information Technology School of Physics and Telecommunication Engineering South China Normal University Guangzhou 510006 China

The physical characters and electrochemical properties of various phases in a Sn-Zn electrode, such as formation energy, plateau potential, specific capacity, as well as volume expansion, were calculated by the first-principles plane-wave pseudo-potential method based on the den- sity functional theory. Sn-Zn films were also deposited on copper foils by an electroless plating technique. The actual composition and chemical characters were explored by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, plasma atomic emission spectrometry （ICP）, and constant current charge/discharge measurements （CC）. The results show that separation phases with tin and zinc including a small quantity of Cu6Sn5 phase were obtained, the initial lithium insertion capacity of the Sn-Zn film was 661 mAh/g, and obvious potential pla- teaus of about 0.4 V and 0.7 V were displayed, which is in accordance with the results of theoretical calculations. The capacity of the Sn-Zn film decreased seriously with the increase of cycle number.

关键词： lithium batteries electrochemical electrodes tin alloys first-principles calculations

Enhanced Compression of Fundamental Solitons in Dispersion Decreasing Fibers with Negative Third-order Dispersion *** Principles

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Chinese Journal of Lasers 2001年第5期 34-40页

作者： CAO Wenhua (Department of Electronic & Information Engineering, Wuyi university, Jiangmen 52.02., china) GUO Qi LIU Songhao (Institute of {2. Electronics, south china normal university, guangzhou 510631, china)

Compression of ultrashort fundamental solitons in dispersion decreasing fibers (DDFs) with negative third order dispersion (TOD) is investigated by solving the generalized nonlinear Schrdinger equation numerically. We have shown that, in contrast to the degradation of soliton compression due to the combined effects of positive TOD and Raman self scattering (RSS), the combined effects of negative TOD and RSS can significantly enhance soliton compression in DDF′s. The enhancement is due to RSS induced redshifting of the soliton wavelength and the negative TOD induced decrease of second order dispersion toward the longer wavelength.

关键词： fundamental solitons pulse compression dispersion decreasing fibers third order dispersion Raman self scattering.