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2009 Symposium on Photonics and Optoelectronics最新文献

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A Measurement of Geometry Parameters in Large-Scale Pipes 大型管道几何参数的测量
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230173
Yali Guo, Yan Han, Linmao Liu
This paper presents a non-contact automatic measurement system on geometry parameters in large-scale pipes based on laser displacement sensor. It resorts to the precise laser displacement technology, inside and outside dimension measurement, servocontrol technology and accurate signal procession, designs a testing system which can measure inside and outside diameter, roundness and other shape parameters. The system composing and principle are presented. The system error calibration and measurement precision are put forward. This system is validated by experiments. The system presented in this paper is adaptive to multi-parameter test for large-scale pipes and any other kinds of pipes.�
提出了一种基于激光位移传感器的大型管道几何参数非接触式自动测量系统。利用精密的激光位移技术、内外尺寸测量、伺服控制技术和精确的信号处理,设计了一套能够测量内外径、圆度等形状参数的检测系统。介绍了系统的组成和工作原理。提出了系统误差标定和测量精度。实验验证了该系统的有效性。该系统适用于大型管道及其他类型管道的多参数测试
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引用次数: 1
Simulating the Illuminance and Efficiency of Sunlight/LED Hybrid Illuminating System Used in Indoor Lighting Design 日光/LED混合照明系统在室内照明设计中的照度及效率模拟
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230123
C. Tsuei, Wen-Shing Sun
In this study we simulate the illuminance and efficiency of sunlight/LED hybrid illuminating system for indoor illumination. According to our calculation results of the examination of simulations and real situations, we find that the sunlight/LED hybrid illumination do perform better than LED or traditional lights. We are assured of the potential advantages of sunlight/LED hybrid illuminating system in the future.
在本研究中,我们模拟了日光/LED混合照明系统的室内照明照度和效率。根据模拟和实际情况的计算结果,我们发现日光/LED混合照明的性能确实优于LED或传统照明。我们相信未来阳光/LED混合照明系统的潜在优势。
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引用次数: 2
Investigation and Experiment of Dynamic Light Disturbance 动态光扰动的研究与实验
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230079
Ming Liu, Y. Fan, Jian Ma, B. Zhang
Dynamic obtrusive light is one of latest light pollutions. In the general situation, the human eye can correctly observe and judge the outside things, such as the size, the shape, the color and so on. If the light color is much too complicated, the color area too small or the change of multicolor light too quick, the resolving capacity and the adaptive capacity of the human eye have a decrease. The impression investigation on dynamic lighting and static lighting was performed. The experiment lays emphasis on the influence of dynamic light pollution on visual perception of the general public by measuring subjects' contrast response under different experiment conditions. The influence of background brightness on subjects' disturbance was discussed and the correlation analysis was performed by SPSS. The results indicated that the flickers from some artistic lighting, such as the LED neon light, the stroboscopic light, laser, etc., result in light pollution. The dynamic light pollution can exert influences on the people’s psychology and emotion and even can cause the traffic accident and the visual damage. Keywords-dynamic light; investigation; obtrusive; psychology; emotion
动态突发性光是最新的光污染之一。在一般情况下,人眼能够正确地观察和判断外界的事物,如大小、形状、颜色等。如果光色太复杂、色面积太小或多色光变化太快,人眼的分辨能力和适应能力就会下降。对动态照明和静态照明进行了印象调查。本实验通过测量被试在不同实验条件下的对比反应,重点研究动态光污染对公众视觉感知的影响。讨论背景亮度对被试干扰的影响,并用SPSS软件进行相关分析。结果表明,LED霓虹灯、频闪灯、激光等艺术照明的闪烁会造成光污染。动态光污染会对人们的心理和情感产生影响,甚至会造成交通事故和视觉损害。Keywords-dynamic淡定;调查;强迫人的;心理学;情感
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引用次数: 0
Thermal Analysis of Rectangular Nd:YVO4 Crystal Double-Side-Pumped by LD LD双侧泵浦Nd:YVO4矩形晶体的热分析
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230310
Wen Chen, P. Shi, Z. Hua, Long Li, Ansheng Gan
Based on analytical theory, distributions of temperature field and thermal distortion field in a rectangular Nd:YVO4 crystal double-side-pumped by LD are investigated. Through the analysis of working characteristics of Nd:YVO4 crystal, a thermal model that matches actual situations of Nd:YVO4 crystal is established. General expressions of temperature field and thermal distortion field in Nd:YVO4 crystal are obtained. And two methods of effectively reducing thermal distortion in Nd:YVO4 crystal are put forward. Results show that a maximum temperature rise of 362.2°C and a maximum thermal distortion of 5.55 μm are obtained in Nd:YVO4 crystal when the output power of the two laser diodes used to pump the Nd:YVO4 crystal are both 30 W. When the off- center distance is 0.6mm, the maximum thermal distortion can be reduced by37.7%; when the thickness of the crystal is reduced by 30%, the maximum thermal distortion can be reduced by 31.7%. Results in this paper can offer theoretical base for better solving thermal problems in laser system.
基于解析理论,研究了LD双侧泵浦Nd:YVO4矩形晶体的温度场和热畸变场分布。通过对Nd:YVO4晶体工作特性的分析,建立了符合Nd:YVO4晶体实际情况的热模型。得到了Nd:YVO4晶体温度场和热畸变场的一般表达式。提出了两种有效减小Nd:YVO4晶体热畸变的方法。结果表明:当泵浦Nd:YVO4晶体的两个激光二极管输出功率均为30 W时,Nd:YVO4晶体的最大温升为362.2℃,最大热畸变为5.55 μm;当离中心距离为0.6mm时,最大热变形可降低37.7%;当晶体厚度减小30%时,最大热畸变可减小31.7%。本文的研究结果可为更好地解决激光系统中的热问题提供理论依据。
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引用次数: 0
Manipulating Overlapping of Bangap in One-Dimensional Complex Photonic Crystal Composed of Anisotropic Material 在各向异性材料组成的一维复光子晶体中控制Bangap的重叠
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230326
Yanling Han, Hong Wang, Liping Yu
The band structure of one-dimensional complex photonic crystals composed of anisotropic media is computed and analyzed using a 4 4× transfer matrix method. The overlapping of band structure has been investigated in detail. Numerical results indicate that through altering the relative orientation of the optical axes of the adjacent layers, it is possible to adjust and extend bandgap of the photonic band structure. Keywordsphotonic crystal; anisotropy; 4 4 × transfer matrix method
采用4×传递矩阵法计算和分析了由各向异性介质组成的一维复杂光子晶体的能带结构。详细研究了带结构的重叠现象。数值结果表明,通过改变相邻层光轴的相对取向,可以调节和扩展光子带结构的带隙。Keywordsphotonic晶体;各向异性;4 . 4 ×传递矩阵法
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引用次数: 0
Design on Driving and Control System of Step Motor in the Laser Quality Analyzing System 激光质量分析系统中步进电机驱动控制系统的设计
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230168
Caixia Wang
The measuring principle of laser beam quality analyzer was introduced and described in detail in the paper, which also discussed the step motor control system's action in the system. It was shown how to choose the type of motor according to the application circumstance and parameters. In order to make sure the position of sampling points for the charge couple device, the paper used AVR single-chip microcomputer whose model number is Mega16L as the central processing unit, chose high rotation torque step motor whose model number is 42BYG1.8 produced by the company called AKS as executive body to control the ball screw to make one-dimension rectilinear motion. Experiments showed that the system's locating precision satisfied the testing demand; the error caused by the step motor was less than 0.03%. System designed by the paper had characteristics such as smooth running and high reliability.
本文详细介绍了激光束质量分析仪的测量原理,并讨论了步进电机控制系统在系统中的作用。介绍了如何根据应用环境和参数选择电机的类型。为了保证电荷偶装置采样点的位置,本文采用型号为Mega16L的AVR单片机作为中央处理单元,选用AKS公司生产的型号为42BYG1.8的大转矩步进电机作为执行机构,控制滚珠丝杠作一维直线运动。实验表明,该系统的定位精度满足测试要求;步进电机产生的误差小于0.03%。本文设计的系统运行平稳,可靠性高。
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引用次数: 0
Design of 3D Optical Network on Chip 片上三维光网络的设计
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230071
Huaxi Gu, Jiang Xu
Optical network on chip is an emerging research topic, which can provide low latency and high bandwidth with significantly lower power dissipation. A 3D mesh based optical network on chip is developed together with a new optical router architecture as the basic units. The new router fully utilizes the properties of dimension order routing in 3D mesh networks, and reduce the number of microresonators required for ONoCs. We compared the loss property of the new router with four other schemes. The results show that the new router achieves the lowest loss for the longest path in the network of the same size. The proposed 3D mesh ONoC is compared with 2D counterpart in three aspects, i.e. energy, latency and throughput. The comparison of power consumption with electronic and 2D counterpart show that 3D ONoC can save about 79.9% energy compared to electronic one, 24.3% energy to the 2D ONoC, all containing 512 IP cores. The simulation of the network performance of the 3D mesh ONoC is carried out by OPNET under different configurations. The results also show the performance improvement over the 2D ONoC.
片上光网络是一个新兴的研究课题,它可以提供低延迟和高带宽,同时显著降低功耗。提出了一种基于三维网格的片上光网络,并以一种新的光路由器结构为基本单元。该路由器充分利用了三维网格网络的维序路由特性,减少了onoc所需的微谐振器数量。我们将新路由器的损耗特性与其他四种方案进行了比较。结果表明,在相同规模的网络中,该路由器在最长路径上的损耗最小。本文从能量、延迟和吞吐量三个方面对所提出的三维网格ONoC与二维网格ONoC进行了比较。与电子和2D ONoC的功耗比较表明,3D ONoC比电子ONoC节能约79.9%,比2D ONoC节能24.3%,均包含512个IP核。利用OPNET对三维网格ONoC在不同配置下的网络性能进行了仿真。结果还表明,与2D ONoC相比,该方法的性能有所提高。
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引用次数: 32
A Novel Violet and Blue Enhanced SINP Silicon Photovoltaic Device 一种新型紫蓝增强型SINP硅光电器件
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230108
Bo He, Q. Zhong, Xu Jing, Lei Zhao, Feng Li, Cheng Shen, N. Zhang, ZhengShan Yu, Yanting Yin
A novel ITO/SiO2/np Silicon SINP violet and blue enhanced photovoltaic device has been fabricated by thermal diffusion of phosphorus for shallow junction to enhance the spectral responsivity within the wavelength range of 400-600nm, low temperature thermally grown an ultrathin silicon dioxide and RF sputtering ITO antireflection coating to reduce the reflected light and enhance the sensitivity. The current-voltage (I-V) characteristics, spectral response and responsivity of high quantum efficiency of violet SINP photovoltaic device and deep junction SINP photovoltaic device were calculated and analyzed in detail. Keywords— ITO; SINP photovoltaic device; current-voltage(I-V) characteristics; spectral response; responsivity
采用磷的热扩散法制备了一种新型ITO/SiO2/np硅SINP紫蓝色增强光伏器件,该器件用于浅结,在400-600nm波长范围内提高了光谱响应性,低温热生长超薄二氧化硅和射频溅射ITO增透涂层,以减少反射光,提高灵敏度。对紫色SINP光伏器件和深结SINP光伏器件的高量子效率的电流-电压特性、光谱响应和响应率进行了详细计算和分析。关键词-伊藤;SINP光伏装置;电流电压(电流-电压)特征;光谱响应;反应性
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引用次数: 2
Investigation of Breast Disease Early Diagnosis Using Spatial Near-Infrared Spectroscopy 空间近红外光谱在乳腺疾病早期诊断中的应用研究
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230152
A. Xu, Jia-bi Chen, Wangcheng
For the early diagnosis and treatment of female breast diseases, the breast diseases diagnosis instrument based on spatial resolution near-infrared spectroscopy technology was invented. Meanwhile, an experiment is carried out to test the effectiveness and efficiency of the new instrument. In the experiment, the diagnosing results of thirty-four volunteers are obtained from the instrument, which show 95.45% specificity, 66.67% sensitivity and a coincidence rate of 85.29%. Keywords-spectrum; near infrared; breast disease; early diagnosis
为了女性乳腺疾病的早期诊断和治疗,发明了基于空间分辨率近红外光谱技术的乳腺疾病诊断仪。同时,通过实验验证了该仪器的有效性和高效性。实验中,该仪器对34名志愿者的诊断结果,特异性为95.45%,敏感性为66.67%,符合率为85.29%。Keywords-spectrum;近红外;乳腺疾病;早期诊断
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引用次数: 0
Research on Dispersion Compensating Property and Nonlinear Coefficient of Photonic Crystal Fiber 光子晶体光纤色散补偿特性及非线性系数研究
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230212
Qianghua Li, Chun-Xia Liu, Hua Li, Tailong Sun
A full-vector effective refractive index model is used to analyze the influence of the nonlinear coefficient and dispersion property on the structural parameters of photonic crystal fiber (PCF). It is possible to design dispersion compensating PCF flexibly with high dispersion value, negative dispersion slope and lower nonlinear coefficient around 1550 nm. Simulation and analysis show that highly nonlinear PCF provides great potential value as dispersion compensation fiber. Keywordsfiber optics; nonlinearity; dispersion compensation; nonlinear coefficient; photonic crystal fiber
利用全矢量有效折射率模型分析了非线性系数和色散特性对光子晶体光纤结构参数的影响。在1550 nm附近灵活设计高色散值、负色散斜率和较低非线性系数的色散补偿光子晶体光纤是可能的。仿真和分析表明,高度非线性的聚光光纤作为色散补偿光纤具有很大的潜在价值。Keywordsfiber光学;非线性;色散补偿;非线性系数;光子晶体光纤
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引用次数: 10
期刊
2009 Symposium on Photonics and Optoelectronics
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