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Study on the non-paraxial beam parameters of single-mode fiber

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Study on the non-paraxial beam parameters of single-mode fib...

2010亚洲光电子会议信息光学和光存储技术分会场

作者： Lianhuang Li * , Fuyuan Guo key laboratory of OptoElectronic Science and technology for Medicine of Ministry of Education fujian provincial key laboratory for photonics technology Institute of Laser and Optoelectronics technology, fujian Normal University, Fuzhou 350007, P. R. China

Based on the non-paraxial vectorial moment theory of light beam propagation and waveguide mode theory, the beam parameters of single-mode fiber including mode-field radius, divergence half-angle and beam propagation factor are analyzed and calculated. Especially, the results of beam propagation factor show that if both the core and cladding layer fields are considered, M 2 ＞1 is always obtained and neglect of the cladding layer field will lead to M 2 ＜1. These conclusions may be useful for further research on beam quality of fiber laser beam.

关键词： Fiber optics beam parameters non-paraxial vectorial moment theory

Frequency hopping sequences based on d-form functions

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The Journal of China Universities of Posts and Telecommunications 2010年第4期17卷 58-62页

作者： KE Pin-hui,ZHANG Sheng-yuan key laboratory of Network Security and Cryptology,fujian Normal University,Fuzhou 350007,China key laboratory of Network Security and Cryptology Fujian Normal University Fuzhou 350007 China

By using d-form function, a new construction of frequency hopping sequence with optimal Hamming correlation is presented in this article, which generalizes the results presented by Ding （2007）. Furthermore, a new class of non-power function style d-form function is proposed and an upper bound of the Hamming autocorrelation of the corresponding sequence is also derived.

关键词： frequency hopping sequence hamming correlation d-form function spread spectrum communication

Propagation of ultrasound modulation scattering signal in multi-layer scattering media:simulations and experiments

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Propagation of ultrasound modulation scattering signal in mu...

2007亚洲光电子会议保健与生物医学光学分会场

作者： Lili Zhu HuiLi Shaofeng Yang Liuhui Chen fujian provincial key laboratory of Photonic technology School of Physics and OptoElectronics technology fujian Normal University Fuzhou fujian 350007 China

In this work, we have studied the propagation of ultrasound modulation scattering signal in multi-layer scattering media. The relations to the modulation light intensity and its modulation depth contributed by the thickness, absorption coefficient and scattering coefficient of two- and three- layered scattering media are figured out. The results of Monte Carlo simulation and experiments show that the modulated depth of the modulated light is only dependent on optical and ultrasonic properties of scattering media within the ultrasound zoom, and doesn’t change in the propagation in multi-layer scattering media. And the modulated depth is a key factor in ultrasound-modulated optical tomography.

关键词： Optical ultrasound-modulation multi-scattering media Monte Carlo simulation modulation depth

Capillary electrophoresis with inhibited electrochemiluminescent detection for the trace analysis of epinephrine and dopamine

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Journal of Pharmaceutical Analysis 2010年第2期22卷 77-82页

作者： Xue-Yang Xiao,Long-Hua Guo,Bin Qiu,Zhen-Yu Lin,Guo-Nan Chen Ministry of Education key laboratory of Analysis and Detection for Food Safety,fujian provincial key laboratory of Analysis and Detection for Food Safety,Department of Chemistry,Fuzhou University,Fuzhou 350002,China. fujian provincial key laboratory of Analysis and Detection for Food Safety Department of Chemistry Fuzhou University Fuzhou 350002 China

In this paper,a novel electrochemiluminescent (ECL) detection approach was developed for highly sensitive detection of ECL inhibitors based on the ECL inhibition of Ru(bpy)32+/2-(Dibutylamino)ethanol (DBAE) system. A microfluidic ECL detection cell was fabricated to couple with the capillary electrophoresis system,the electrochemical system and the postcolumn injection system. Both Ru(bpy)32+ and DBAE solutions were injected directly to the working electrode surface by a micro-infusion system to obtain a high and stable ECL signal. The performance of this setup was demonstrated by the analysis of two typical ECL inhibitors,dopamine and epinephrine. Under the optimal conditions,the limit of detection (LOD) for dopamine and epinephrine was 50nM and 5nM respectively. The proposed method was also successfully used for the trace analysis of dopamine and epinephrine in human serum samples.

关键词： capillary electrophoresis inhibited electrochemiluminescence Ru(bpy)32+ epinephrine dopamine

Visualizing nitric oxide in live cells by confocal laser scanning microscopy

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Visualizing nitric oxide in live cells by confocal laser sca...

中国光学学会2011年学术大会

作者： Yimei Huang,Hongqin Yang,Xiuqiu Shen,Liqin Zheng,Hui Li,Shusen Xie key laboratory of Optoelectronic Science and technology for Medicine of Ministry of Education,fujian provincial key laboratory of Photonic technology,Institute of Laser and Optoelectronics technology,fujian Normal University,Fuzhou,fujian 350007,China

Nitric oxide（NO） is an im portant molecular involved in a wide range of physiological and pathological *** has dem onstrated that NO plays a contradictory role dependent on the concentration of ***,measuring the concentration of NO in living cells is essential to understanding whether NO functions as toxic or protective *** this paper,we presented an opti cal method that utilized a nitric oxide fluorescence probe to characterize the concentration of NO in HeLa cells and rat dorsal root ganglion（DRG） ne urons by confocal laser scanning *** addition,we o ptimized the measurement conditions for low photobleaching and *** results showed that there were differences between HeLa cells and DRG neurons on the concentration of NO.

关键词： nitric oxide HeLa dorsal root ganglion fluorescence probe adenosine-triphosphate confocal laser scanning microscopy

Rapid Fabrication of CdS Nanocrystals with Well Mesoporous Structure Under Ultrasound Irradiation at Room Temperature

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Chemical Research in Chinese Universities 2012年第1期28卷 124-128页

作者： YU Chang-lin1, ZHOU Wan-qin2,3, YU Jim-my4, YANG Jian-gao5 and FAN Qi-zhe1 1. School of Metallurgy and Chemical Engineering, 2. School of Information Engineering, Jiangxi University of Science and technology, Ganzhou 341000, P. R. China 3. fujian provincial key laboratory of Photocatalysis-State key laboratory Breeding Base, Fuzhou University, Fuzhou 350002, P. R. China 4. Department of Chemistry, Center of Novel Functional Molecules, and Environmental Science Programme, Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, P. R. China 5. Engineering Research Center of High-efficiency Development and Application technology of Tungsten Resources, Ministry of Education, Jiangxi University of Science and technology, Ganzhou 341000, P. R. China School of Metallurgy and Chemical Engineering Jiangxi University of Science and Technology Ganzhou 341000 School of Information Engineering Jiangxi University of Science and Technology Fujian Provincial Key Laboratory of Photocatalysis-State Key Laboratory Breeding Base Ganzhou 341000 Department of Chemistry Center of Novel Functional Molecules and Environmental Science Programme Chinese University of Hong Kong Hong Kong Engineering Research Center of High-efficiency Development and Application technology of Tungsten Resources Ministry of Education Jiangxi University of Science and Technology Ganzhou 341000

Sphere-like mesoporous CdS nanocrystals with high crystallinity and big surface area were successfully fabricated by ultrasound irradiation at room temperature. The as-synthesized CdS with and without ultrasound irra diation was investigated by the characterizations of X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, and Brunauer-Emmett-Teller（BET） surface areas. The photocatalytic acti vity of the CdS was evaluated by photocatalytic degradation of methyl orange under visible light（λ〉420 nm） irradia tion. A possible mechanism for the formation of the CdS nanocrystals with mesoporous structure under ultrasound irradiation was proposed. The results show that both the template role of the triblock copolymer of P123 and the effect of ultrasound-induced aggregation are mainly responsible for the formation of mesoporous structure. On the other hand, the energy generated from acoustic cavitation can effectively accelerate the crystallization process of the amorphous CdS.

关键词： CdS Crystallinity Mesoporous structure Ultrasound-induced aggregation

Texture-based classification of photoaged skin epidermis in vivo at different ages

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Texture-based classification of photoaged skin epidermis in ...

中国光学学会2011年学术大会

作者： Xiaoman Zhang,Shulian Wu,Shufei Xu and Hui Li key laboratory of Optoelectronic Science and technology for Medicine of Ministry of Education,fujian provincial key Lab of Photonic technology,School of Physics and OptoElectronics technology,fujian Normal University,Fuzhou,fujian 350007,China

The results based on a Gray Level Co-occurrence Matrix（GLCM） analysis and Fast Fourier Transform（FFT） analysis were presented for two sets of female’s cheek skin epidermis images at different ages in *** female from countryside have been exposed to sunlight from *** GLCM were utilized to evaluate the texture feature of the regions of interest（ROI） of the cheek skin in our *** texture classification,we used 25 images（320×240 pixels） of each sets at 20-30 years old and above 60 years old..Three texture features,i.e.,energy,contrast and correlation,were extracted from the skin images and analyzed at four orientations（0 。,45 。,90 。,135 。） accompanying with different distances between two *** characteristics of textures in different aging skins were uncovered by FFT in which the orientation index of dermatoglyph *** differences in texture feature changes are found in different aging skins,which can be good indicators for the statuses of aging skins.

关键词： Gray Level co-occurrence matrix Fast Fourier Transform Texture feature image processing

A bioactive glass functional hydrogel enhances bone augmentation via synergistic angiogenesis,self-swelling and osteogenesis

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Bioactive Materials 2023年第4期22卷 201-210页

作者： fujian Zhao Zhen Yang Huacui Xiong Yang Yan Xiaofeng Chen Longquan Shao Stomatological Hospital Southern Medical UniversityGuangzhou510280China Department of Biomedical Engineering School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou510641China National Engineering Research Center for Tissue Restoration and Reconstruction South China University of TechnologyGuangzhou510006China Guangdong provincial key laboratory of Construction and Detection in Tissue Engineering Guangzhou510515China

Bone augmentation materials usually cannot provide enough new bone for dental implants due to the material degradation and mucosal *** use of hydrogels with self-swelling properties may provide a higher bone augmentation,although swelling is generally considered to be a disadvantage in tissue ***,a double-crosslinked gelatin-hyaluronic acid hydrogels(GH)with self-swelling properties were ***,niobium doped bioactive glasses(NbBG)was dispersed in the hydrogel network to prepare the GH-NbBG *** composite hydrogel exhibited excellent biocompatibility and the addition of NbBG significantly improved the mechanical properties of the *** vivo results found that GH-NbBG synergistically promoted angiogenesis and increased bone augmentation by self-swelling at the early stage of *** addition,at the late stage after implantation,GH-NbBG significantly promoted new bone formation by activating RUNX2/Bglap signaling ***,this study reverses the self-swelling disadvantage of hydrogels into advantage and provides novel ideas for the application of hydrogels in bone augmentation.

关键词： Bioactive glass Bone formation Osteogenesis Angiogenesis

银胶浓度对电穿孔获取细胞内表面增强拉曼光谱的影响

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生物化学与生物物理进展 2011年第10期38卷 961-966页

作者：俞允林居强黄浩陈燕坪冯尚源苏颖陈杰斯陈荣福建师范大学医学光电科学与技术教育部重点实验室福建省光子技术重点实验室福州350007 福建中医药大学中西医结合学院福州350108 福建省肿瘤医院福州350001

探究了银胶浓度对于电穿孔导入银纳米粒子获取细胞内表面增强拉曼光谱(SERS)的影响.对6组含有不同浓度银胶的鼻咽癌细胞C666进行电穿孔,测量电穿孔后活细胞内表面增强拉曼光谱.以测得的SERS信号、光谱强度积分值和谱线重复性为指标,研... 详细信息

探究了银胶浓度对于电穿孔导入银纳米粒子获取细胞内表面增强拉曼光谱(SERS)的影响.对6组含有不同浓度银胶的鼻咽癌细胞C666进行电穿孔,测量电穿孔后活细胞内表面增强拉曼光谱.以测得的SERS信号、光谱强度积分值和谱线重复性为指标,研究银胶浓度对电穿孔获取细胞内SERS的影响,对电穿孔后活性C666细胞内SERS平均光谱进行初步谱峰归属.在脉冲电场强度875 V/cm,脉冲持续时间1 ms,电脉冲2次的条件下,每500μl电击缓冲液中含有50μl银胶时测得的细胞内SERS光谱信噪比高,且光谱具有较好的重复性.结果说明,正确选择银胶浓度可以提高电穿孔-SERS效果,获取高质量的活细胞内SERS信号.此研究有助于扩展表面增强拉曼光谱的应用,包括实时检测分析活细胞内生化成分及分布,实时监测细胞生化变化过程等.

关键词：表面增强拉曼散射(SERS) 电穿孔 C666细胞银胶浓度