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Generation of vector beams and their focal properties

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Generation of vector beams and their focal properties

Analytical Model of Non-dispersion-limited Transient Stimulated Raman Scattering in Single-mode Silica Fiber in WDM Optical Communication System

2007亚洲光电子会议全息/衍射光学及应用分会场

作者： Xi-Lin Wang Jianping Ding Si-Hong Zhai Jing Chen Ya-Xian Fan Hui-Tian Wang department of Physics nanjing university nanjing 210093 china

We describe a convenient way to generate arbitrary vector beams by using a spatial light modulator, based on interferometric superposition of two orthogonally polarized beams. In our constructed optical setup, the SLM is used to produce a computer-generated holographic grating that diffracts a linearly polarized incident light into the +1st and -1st diffraction orders with desired wavefronts. After the two diffraction beams pass through two quarter wave-plates, the left-and right-handed circularly polarizations are yielded, respectively. Then a Rochi grating is utilized to recombine the two beams into single one such that any desired polarization configuration is achieved. We demonstrate the versatility of our method through optical experiment, in which a variety of polarization beams are realized. By making use of the incident wave with helical phase, our technique can produce both cylindrically symmetric and asymmetric polarizations. To the best of our knowledge, the experimental realization of cylindrically asymmetric polarization is reported for first time. We also study the focal properties of vector beam through a high numerical aperture lens. Starting from Richards-Wolf vectorial diffraction theory we calculate the focal field distribution and obtain some interesting focal volume structures, such as flat-topped focus, doughnut focus with special dark volume structure.

关键词： vector beam focus shaping spatial light modulator vectorial diffraction optical vortex computer-generated holography

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Chinese Journal of Lasers 2000年第2期9卷 175-181页

作者： GONG Jiamin FANG Qiang LIU Juan WANG Yongchang (Insitute of Modern Physics, Xi' an Jiaotang university, Xi' an 710049, china department of Telecommunications, Xi' an Institute of Posts and Telecommunications, Xi' an 710061, china ) 西安交通大学陕西西安西安邮电学院陕西西安

The non-dispersion-limited analytic acutions of unidirectional N-channel transient stimulated Raman scattering (SRS) coupling wave equation which governing the propagation of the optical signals in single-mode (SM) silica fiber have been presented. Taking into account the SRS cross coupling among the N- channels, the analytic solutions are applicable to the system with arbitrary channel separation and input signal light power.

关键词： stimulated Raman scattering (SRS) wavelength division multiplexing (WDM) fused silica fiber Raman amplification Raman crosstalk

ASYMPTOTIC STABILITY OF SOLUTION TO THE INITIAL-BOUNDARY VALUE PROBLEM FOR SCALAR VISCOUS CONSERVATION LAWS CORRESPONDING TO RAREFACTION WAVES

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Systems Science and Mathematical Sciences 1999年第4期12卷 366-377页

作者： LIU HongXia(department of Mathematics, Jinan university, Guangzhou 510632, china)PAN Tao(department of Mathematics and Information Science, Guangxi university, Nanning 530004, china) 暨南大学数学系广东广州 510632 广西大学数学和信息科学系广西南宁 530004

This paper is concerned with the asymptotic behaviors of solutions of thegeneral initial-boundary value problem to scalar viscous conservation law uxx on R+ with the conditions u（0, t） = u-（t） u-（t ）,u（x,0） = u0（x） u+（x-）, where f"（u） > 0 for all u under consideration, u- 0 admits the rarefaction wave. Ourproblem is divided into five cases depending on the signs of the characteristic speeds of the boundary state u- at t= and the far field state u+ = u（+）. Both the globalexistence of the solution and the asymptotic stability are shown in all cases.

关键词： Viscous conservation law rarefaction wave asymptotic stability boundary.

Diallyl disulfide suppresses growth of HL-60 cell through increasing his-tone acetylation and p21WAF1expression in vivo and in vitro

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Acta Pharmacologica Sinica 2006年第11期27卷 1459-1466页

作者： Jie ZHAO~(2,3)Wei-guo HUANG~2 Jie HE~2 Hui TAN~2 Qian-jin LIAO~2 Qi SU~(2,4)2 Cancer Research Institute,Nanhua university,Hengyang 421001,china 3 department of Pathology,Mawangdui Hospital,Changsha 410016.china Cancer Research Institute Nanhua University Hengyang China department of Pathology Mawangdui Hospital Changsha China

Aim:To examine the differentiation induction and growth inhibition of HL-60 cellsby diallyl disulfide（DADS）,and its relationship with the alterations of histoneacetylation and p21WAF1expression in vitro and in ***:Differentiationwas studied by nitroblue tetrazolium（NBT）reduction of HL-60 cell in ***-60cells 5×10～6 were injected into the right side of the peritoneal cavity of severecombined immunodeficiency（SCID）*** the peritoneal neoplasms weredetected,the SCID mice were randomly divided into 3 groups and received an ipinjection of vehicle alone（NS）,DADS or sodium butyrate（SB）.The growthinhibition of peritoneal neoplasms induced by DADS was observed by a *** cycle distribution of HL-60 cells in SCID mice was monitored by *** expression of acetylated histone H3,H4 and p21WAF1were mea-sured by Western ***:After treatment with DADS for 0-72 h,the NBTreduction ability of HL-60 cells increased in a time-dependent manner,comparedwith no treatment of HL-60 *** the HL-60 cells treated with DADS for 24 h,theexpression of acetylated histone H3,H4,and p21WAF1increased *** with DADS,tumor growth was markedly ***-60 cells frommice treated with DADS were blocked in the G1phase,from 25.4% to 63.4%.Thetumors from the mice treated with DADS showed an increase of acetylated his-tone H3,H4,and ***:DADS could induce differentiation andinhibit the growth of HL-60 cells through increasing the expression of acetylatedhistone H3,I44,and p21WAF1in vitro and in vivo.

关键词： diallyl disulfide leukemia growth inhibition histone acetylation p21WAF1

艰难的啮合——从文学作品看美国华人寻求文化身份的进程

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新乡师范高等专科学校学报 2003年第4期17卷 89-91页

作者：滕毅南京师范大学文学院，江苏南京2l0097

长期以来，华人移民在美国社会寻求自己文化身份的历程也是他们不断融入美国社会的历程，这个融合走过了一段漫长而艰难的路程，在克服文化差异上的诸多困难后，今天，终于能够以多元文化的参与者成为美国社会多样性文化的组成部分之一... 详细信息

长期以来，华人移民在美国社会寻求自己文化身份的历程也是他们不断融入美国社会的历程，这个融合走过了一段漫长而艰难的路程，在克服文化差异上的诸多困难后，今天，终于能够以多元文化的参与者成为美国社会多样性文化的组成部分之一。通过文学作品来回顾并梳理这一文化融合过程，对于今天中华传统文化在21世纪如何复兴，以及以什么样的面目复兴的问题，都有着不可或缺的参考意义。

关键词：多元文化融合价值体系文化传统文学作品美国华人

TRANSFORMATION OF Nd_(14)Fe_(73)Co_6B_7 ALLOY UNDER HYDROGEN TREATMENT

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Acta Metallurgica Sinica(English Letters) 1993年第6期6卷 379-382页

作者： LIU Jian QIU Baoqin LIU Muyi XIAO Yaofu university of Science and Technology Beijing,Beijing,china associate professor,department of Materials,university of Science and Technology Beijing,Beijing 100083,china Univ of Science and Technology Beijing Beijing China

The phase constitution and variation of Nd_(14)Fe_(73)Co_6B_7 alloy after hydriding and subsequent dehydriding treatment at 770℃ have been investigated respectively by means of X-ray diffraction,SEM,TEM and magnetic measurement *** original coarse,as cast grain structure,is dissolved into α-Fe,Nd hydride and Fe_2B mixture with average dimension of 0.1 μm,during hydriding process,and subsequently the triphase mixture recombined into finely unique Nd_2Fe_(14)B phase with dimension of 0.3 μm by desorbing the *** was found that the Nd-rich phase distributed at the boundary of as-cast grain structure diffused into matrix Nd_2Fe_(14)B grain during *** remains during dehydriding and distribute homogeneously around some colonies composed of fine grains of Nd_2Fe_(14)B.

关键词： Nd_(14)Fe_(73)Co_6B_7 Nd-rich phase phase transformation hydriding

Organic anion transporting polypeptide-1B1 haplotypes in Chinese patients

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Acta Pharmacologica Sinica 2007年第10期28卷 1693-1697页

作者： Lin-yong XU~2,Yi-jing HE~3,Wei ZHANG~3,Sheng Deng~4,Qing LI~3,Wei-xia ZHANG~3,Zhao-qian LIU~3,Dan WANG~3,Yuan-feiHUANG~3,Hong-hao ZHOU~(3,5),Zhen-qiu SUN~(2,5)~2 department of Epidemic and Health Statistics,School of Public Health,Central South university,Changsha 410078,china,~3 Pharmaeoge-netics Research Institute,Institute of Clinical Pharmacology,Central South university,Changsha 410078,china ~4 Affiliated XiangyaHospital of Central South university,Changsha 410078,china department of Epidemic and Health Statistics School of Public Health Central South University Changsha China Pharmacogenetics Research Institute Institute of Clinical Pharmacology Central South University Changsha China Affiliated Xiangya Hospital of Central South university Changsha China

Aim:To detect 388G>A and 521T>C variant alleles in the organic anion trans-porting polypeptide-1B 1 （OATP 1B 1,encoding gene SLCO 1B 1） ***:One hundred and eleven healthy volunteers were screened for OATP1B 1 alleles inour ***-restriction fragment length polymorphism was used to identifythe 388G>A polymorphism and a 1-step tetra-primer method was developed forthe determination of 521T>C ***:The frequencies of the 388G>Aand 521T>C variant alleles in the Chinese population were 73.4% and 14.0%,*** frequencies of the SLCO1B1*1b and*15 haplotypes were59.9% and 14.0%,***:The SLCO1B1*1b and SLCO1B1*15variants are relatively common in the Chinese *** frequencies aresimilar to that in the Japanese,but significantly different from that in Caucasiansand blacks.

关键词： organic anion transporting polypeptide-1B1 388G>A 521T>C genotyping Chinese patients

The study of two-color excitation upconversion of Pr(0.5)Yb(3):ZBLAN

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Science china(Physics,Mechanics & Astronomy) 2006年第2期49卷 169-177页

作者： CHEN Xiaobo1 & SONG Zengfu2 1. Applied Optics Beijing Area Major Laboratory, Analysis and testing center, Beijing normal university, Beijing 100875, china 2. Peking university, Physics School, Beijing 100871, china Applied Optics Beijing Area Major Laboratory Analysis and testing center Beijing Normal University Beijing China Physics School Peking University Beijing China

The excited state absorption upconversion of Pr(0.5)Yb(3):ZBLAN glass material, under two-color excitation of the 960 nm semiconductor laser and the Xe lamp light simultaneously, is reported in this article. It was found that the upconversion emission spectra of 480.1, 519.0, 601.9 and 631.8 nm coincide with the common emission spectra. Meanwhile, the upconversion-excitation spectrum has three obvious peaks under two-color excitation, and they respectively correspond to the 856.0 nm upconversion ex-citation transition [1G4(Pr3+)→1I6(Pr3+) and 1G4(Pr3+)→3P1(Pr3+)], the 789.0 nm upconver-sion excitation transition 1G4(Pr3+)→3P2(Pr3+), and the 803.7 nm upconversion excitation transition 3H6(Pr3+)→1D2(Pr3+). The upconversion excitation transition 1G4(Pr3+)→1I6(Pr3+) is strong because its oscillator strength f = 23.040×10?6 is large, which results in a large peak appearing in the upconversion excitation spectrum. That is just the new interesting two-color excitation upconversion luminescence phenomenon of Pr(0.5)Yb(3):ZBLAN induced by one laser and one continuous normal light simultaneously.

关键词： upconversion volumetric three-dimensional display two-color excitation.

Crystal　Growth　and　Nonlinear　Optical　Properties　of　4－Br－4＇－Methoxychalcone（BMC）

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Chinese Journal of Lasers 1994年第6期B3卷 553-556页

作者： CAO Yang ZHU Zhidong SHEN Xiaoping(department of Chemistly, Suzbou university, Suzhou 2 15006, china) Suzhou Univ SuZhou China

ＣｒｙｓｔａｌＧｒｏｗｔｈａｎｄＮｏｎｌｉｎｅａｒＯｐｔｉｃａｌＰｒｏｐｅｒｔｉｅｓｏｆ４－Ｂｒ－４＇－Ｍｅｔｈｏｘｙｃｈａｌｃｏｎｅ（ＢＭＣ）￥ＣＡＯＹａｎｇ；ＺＨＵＺｈｉｄｏｎｇ；ＳＨＥＮＸｉａｏｐ... 详细信息

ＣｒｙｓｔａｌＧｒｏｗｔｈａｎｄＮｏｎｌｉｎｅａｒＯｐｔｉｃａｌＰｒｏｐｅｒｔｉｅｓｏｆ４－Ｂｒ－４＇－Ｍｅｔｈｏｘｙｃｈａｌｃｏｎｅ（ＢＭＣ）￥ＣＡＯＹａｎｇ；ＺＨＵＺｈｉｄｏｎｇ；ＳＨＥＮＸｉａｏｐｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣ...

关键词： crystal growth second--order nonlinear hyperpolarizibility BMC