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2009 Symposium on Photonics and Optoelectronics最新文献

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Investigate on the Feasibility of Introducing Dopants with High Phonon Enegy into Tellurite Host to Enhance 1.5μm Emission Efficiency 在碲基体中引入高声子能量掺杂剂提高1.5μm发射效率的可行性研究
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230254
Yanmin Yang, Zhi-ping Yang, Baojiu Chen
The glasses samples of Er 3+ doped boro-tellurite, germanium-tellurite, phosphate-tellurite with alternant- changed components have been prepared. The obtained data indicated that introducing the dopants (H3BO3 and NaPO3) into tellurite hosts can not enhance 1.5μm emission efficiency because of higher phonon energy and the lower refractive indexes n and GeO2 owing to lower phonon energy than that of borate and phosphate can enhance 1.5μm emission efficiency when introduced into tellurite hosts. In order to obtain higher 1.5μm emission efficiency the dopants owing to higher the index of refraction is suggested.
制备了掺er3 +硼碲酸盐、掺锗碲酸盐、掺磷碲酸盐组分交替变化的玻璃样品。得到的数据表明,将H3BO3和NaPO3掺杂到碲基体中,由于声子能量较高,不能提高1.5μm的发射效率;而将掺入硼酸盐和磷酸盐的掺入,由于声子能量较低,折射率n和GeO2较低,因此不能提高1.5μm的发射效率。为了获得更高的1.5μm发射效率,建议采用高折射率的掺杂剂。
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引用次数: 1
Analysis of Plasma Fluorescence Spectra Mechanism 等离子体荧光光谱机理分析
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230115
Shumei Gao, Jun Lu, L. Ge
the UV-induced plasma fluorescence spectra are obtained by FLS920 Spectrometer. There is a stronger and wider peak from 300nm to 410nm in the plasma fluorescence spectrum. Using soft analysis, it is found that the peak is actually consisted of two Gaussion curves, or two fluorophores, which are albumin and immunoglobulin (Ig). And their rate is about 58% and 37% completed. We are thought that the Albumin fluorescence is most, but the fluorescence information of Ig is more important for medical diagnoses. Abnormity of immune system may change Ig construction, and its spectral characteristics is altered. Therefore, based on UV-induced plasma spectra, Ig spectra can be indirectly studied by mathematical analysis. KeywordsUV-fluorescence, plasma, albumin, immunoglobulin (Ig)
紫外诱导等离子体荧光光谱由FLS920光谱仪获得。等离子体荧光光谱在300nm ~ 410nm处有一个更强、更宽的峰。通过软分析发现,该峰实际上是由两条高斯曲线或两个荧光团组成的,它们是白蛋白和免疫球蛋白(Ig)。它们的完成率约为58%和37%。我们认为白蛋白荧光是最重要的,但Ig的荧光信息对医学诊断更重要。免疫系统异常可改变Ig结构,改变其光谱特征。因此,基于紫外诱导等离子体光谱,可以通过数学分析间接研究Ig光谱。关键词:紫外荧光,血浆,白蛋白,免疫球蛋白
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引用次数: 0
Optical Data Buffering Based on Stimulated-Brillouin-Scattering-Induced Acoustic Storage in an As2Se3 Fiber As2Se3光纤中基于受激布里渊散射诱导声存储的光数据缓冲
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230052
Zhiyao Zhang, Xiaojun Zhou, Rui Liang, Zujun Qin, Yong Liu
Buffering of a 2.5 Gb/s bit stream with non-return-to- zero format is numerically demonstrated based on stimulated- Brillouin-scattering-induced acoustic storage in an As2Se3 fiber. The storage process and the retrieval process of the bit stream are separately controlled by a "Write" pulse and a "Read" pulse. Simulation results show that output signal-to-noise ratio of 21 dB, 18 dB, 16 dB, and readout efficiency of 71%, 47%, 31% can be achieved after 5-ns, 10-ns, 15-ns storage, respectively. The "Write" and "Read" pulses are chirped Gaussian ones with single pulse energy of ~0.25 �� J and spectrum-width of ~5 GHz, which are technically achievable. Buffering of a consecutive 10- bit-long 2.5 Gb/s non-return-to-zero bit stream has also been demonstrated in the As2Se3 fiber with length of 0.5 m. This buffering method can be used for all-optical buffering in optical- communication systems.
基于As2Se3光纤中受激布里渊散射诱导声存储,对不归零格式的2.5 Gb/s比特流进行了数值模拟。位流的存储过程和检索过程分别由一个“写”脉冲和一个“读”脉冲控制。仿真结果表明,在5-ns、10-ns、15-ns存储后,输出信噪比分别为21 dB、18 dB、16 dB,读出效率分别为71%、47%、31%。“写”和“读”脉冲为啁啾高斯脉冲,单脉冲能量为~0.25 J,谱宽为~5 GHz,在技术上是可以实现的。在长度为0.5 m的As2Se3光纤中也演示了连续10位长的2.5 Gb/s不归零比特流的缓冲。这种缓冲方法可用于光通信系统的全光缓冲。
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引用次数: 0
A Simplified Algorithm to the Atmospheric Transmittance 大气透射率的一种简化算法
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230276
Shan Chen, Ji-yin Sun
It is very complex that the infrared radiation's actual transmission process through earth's atmosphere. There is interaction between radiation and atmospheric component. The radiation transmittance will be weakened because of the absorption and the scattering. The atmospheric transmittance is an important parameter to measure the attenuation. This paper summarizes the infrared radiation's transmission process in atmosphere, studies the computation method of atmospheric transmittance, analyzes the absorption attenuation of the atmospheric gas such as steam and carbon dioxide, the scattering attenuation and the attenuation caused by meteorological condition, infers the computation method of the atmospheric equivalent path, and gives the atmospheric transmittance simplified algorithm. Finally this paper gives the atmospheric transmittance computation result under given meteorological condition, also gives the contrast curve with LOWTRAN7.0. The algorithm has certain reference value in the project application. The problem that the infrared radiation transmits in the atmosphere is always paid attention by the designers who deal with the photoelectricity measurement system and the researchers who deal with the radiation transmission in the earth atmosphere. There is more and more attached importance to the research of the atmospheric transmission model. There are many studies relating to the atmospheric transmission characteristic of infrared radiation, such as the object infrared detection, the navigation, the communication, the earth resource distance survey, etc. Generally there are three atmospheric radiation transmission models such as LOWTRAN, MODTRAN and FASCODE. These application softwares are developed by Air Force Geophysics Laboratory of America (AFGL) according to different application purpose. But it is complex to use these softwares by many project personnel. This paper gives a kind of atmospheric transmittance simplified algorithm.
红外辐射在地球大气中的实际传输过程是非常复杂的。辐射与大气成分之间存在相互作用。由于吸收和散射,辐射透过率会降低。大气透过率是测量衰减的重要参数。本文总结了红外辐射在大气中的传输过程,研究了大气透过率的计算方法,分析了大气中蒸汽、二氧化碳等气体的吸收衰减、散射衰减和气象条件引起的衰减,推导了大气等效路径的计算方法,给出了大气透过率的简化算法。最后给出了给定气象条件下的大气透过率计算结果,并给出了与LOWTRAN7.0的对比曲线。该算法在工程应用中具有一定的参考价值。红外辐射在大气中的传输问题一直是从事光电测量系统设计人员和从事地球大气辐射传输研究人员所关注的问题。大气传输模式的研究越来越受到重视。红外辐射大气传输特性的研究有很多,如目标红外探测、导航、通信、地球资源距离测量等。大气辐射传输模式一般有LOWTRAN、MODTRAN和FASCODE三种。这些应用软件是美国空军地球物理实验室(AFGL)根据不同的应用目的开发的。但是对于许多项目人员来说,使用这些软件是很复杂的。本文给出了一种大气透射率的简化算法。
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引用次数: 1
Experimental Investigation on How Sampling Frequency Affects the Measured Stiffness of an Optical Trap 采样频率对光阱测量刚度影响的实验研究
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230139
Y. Ren, Min-Cheng Zhong, Jianguang Wu, Ziqiang Wang, Yin-mei Li
The stiffness of an optical trap is an extremely important parameter in measuring mechanical properties of biological micro-particles or colloids. Few attentions are paid to experimental study of the stiffness v .s. sampling frequency dependence. We studied experimentally how the sampling frequency of a detector influences the measured transversal stiffness of a single beam optical trap. The stiffness of an optical trap was calibrated by detecting the reflected light signal by polystyrene spheres through a quadrant photodiode detector (QPD), and then calculated using the Boltzmann statistics method. In our experiments, polystyrene spheres had been used to conclude that in the directions both parallel (p) and perpendicular (s) to the laser polarization direction, the measured stiff-nesses are different and all varies with the sampling rate of the QPD used in our experiment. For a certain sampling frequency range, the measured stiffness decreases while the sampling frequency increases. Our results provide researchers information for sampling frequency selection in related experiments.
在测量生物微粒或胶体的力学性能时,光阱的刚度是一个非常重要的参数。目前国内外对结构刚度的实验研究较少。采样频率依赖性。实验研究了探测器的采样频率对单束光阱横向刚度的影响。通过四象限光电二极管探测器(QPD)检测聚苯乙烯球的反射光信号,标定了光阱的刚度,并用玻尔兹曼统计方法进行了计算。在我们的实验中,我们用聚苯乙烯球得出结论,在平行于激光偏振方向(p)和垂直于激光偏振方向(s)的方向上,测量的刚度是不同的,并且都随实验中使用的QPD的采样率而变化。在一定的采样频率范围内,实测刚度随采样频率的增加而减小。研究结果可为相关实验的采样频率选择提供参考。
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引用次数: 1
Deconvolution Algorithm with LTI Wiener Filter in Photoacousic Tomography 光声层析成像中LTI维纳滤波的反卷积算法
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230129
Tao Lu, Huiyong Mao
In order to improve the imaging contrast in photoacoustic tomography, the frequency spectrum of photoacoustic signal should be restored by deconvolving the transducer impulse response out of the photoacoustic signal of the tissue phantom. But it is difficult to generate photoacoustic impulse of a temporal delta function in experiment. To solve the problem, a method that the photoacoustic impulse was produced by a point optical absorber was proposed. The relationship between the transducer frequency response to a temporal delta function and a point optical absorber was studied. A LTI wiener filter was used during deconvolution in order to suppress noise adaptively. The photoacoustic image was finally reconstructed by time-domain spherical back projection algorithm. The feasibility of the method was demonstrated both by numerical simulation and experiment.
为了提高光声断层成像的成像对比度,需要将组织模态光声信号中的换能器脉冲响应进行反卷积,从而恢复光声信号的频谱。但是在实验中很难产生时间δ函数的光声脉冲。为了解决这一问题,提出了一种利用点光吸收器产生光声脉冲的方法。研究了换能器的时间δ函数频率响应与点光吸收器的关系。在反卷积过程中采用LTI维纳滤波器自适应抑制噪声。最后利用时域球面反投影算法重建光声图像。通过数值模拟和实验验证了该方法的可行性。
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引用次数: 3
Design of Cursor Signal Acquisition Module in Full Automated Intelligent Gyroscope 全自动智能陀螺仪中光标信号采集模块的设计
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230172
Yu-chi Lin, Guimei Dong, Li Feng, Mingchun Lin
The control system of full automated intelligent gyroscope is presented, in which the automatic cursor signal acquisition module is designed based on CCD sensor and digital signal process technique to get the accurate center of the moving cursor in the gyro. Using the novel light source LED instead of lamp, the CCD driver circuit is designed with CPLD. It has been proved through experiments that the module can substitute for manual measurement to recognize the cursor signal effectively. The precision of the gyroscope is improved from 20�" to 8�" .
介绍了全自动智能陀螺仪的控制系统,设计了基于CCD传感器和数字信号处理技术的游标信号自动采集模块,以获得陀螺仪中运动游标的准确中心。采用新型光源LED代替灯,采用CPLD设计CCD驱动电路。实验证明,该模块可以代替人工测量有效地识别光标信号。陀螺仪的精度由原来的20°"提高到8°"。
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引用次数: 0
Optical Biosensor for Sensitive and Fast Detection of Ampicillin Residues in Milk Samples 用于牛奶样品中氨苄西林残留灵敏快速检测的光学生物传感器
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230148
Zengfu Zhang, Jin Liu, Kexin Xu, F. Huang, Ting Shi
The use of a surface Plasmon resonance immunosensor for the analysis of ampicillin is described. An immunoassay was developed with a miniature surface plasmon resonance (SPR) biosensor to quantify the ampicillin residues in milk samples. It was a competitive inhibition assay with ampicillin covalently immobilized on the sensor surface. A fixed amount of monoclonal anti-ampicillin antibody was mixed with the sample and then the amount of free antibody was determined using biospecific interaction analysis by injection of the mixture over the ampicillin immobilized sensor surface. The limit of detection of the ampicillin is 2.5ng mL(-1), which is below the maximum residue limits (4ng mL(-1)). The measurement period for one is 10 min. Repeatability of the assay is very good, and the coefficient of variation at 2.5ng mL(-1) is 5.4% in different days.
描述了使用表面等离子体共振免疫传感器分析氨苄西林。采用微型表面等离子体共振(SPR)生物传感器,建立了一种定量牛奶样品中氨苄西林残留的免疫测定方法。这是一个竞争性抑制实验,氨苄西林共价固定在传感器表面。将一定量的单克隆抗氨苄西林抗体与样品混合,在氨苄西林固定化传感器表面注射单克隆抗氨苄西林抗体,用生物特异性相互作用分析法测定游离抗体的数量。氨苄西林的检出限为2.5ng mL(-1),低于最大残留限量(4ng mL(-1))。测定周期为10 min,重复性好,在2.5ng mL(-1)时,不同天的变异系数为5.4%。
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引用次数: 1
Analysis of Silicon Ion-Implanted Nd:YVO4 as a Waveguide Laser Medium Operating at 1.06 μm 硅离子注入Nd:YVO4作为工作在1.06 μm的波导激光介质的分析
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230328
G. Du, Gui-qiu Li, Shengzhi Zhao, J. An, Ming Li, Jian Liang, Tao Li, W. Wang
waveguide laser medium operating at 1.06 μm Guolong Du , Guiqiu Li, Shengzhi Zhao, Jing An, Ming Li, Jian Liang, Tao Li and Wei Wang School of Information Science and Engineering, Shandong University, Jinan 250100, China Abstract: The planar waveguide was formed in an x-cut Nd:YVO4 crystal by 3.0 MeV Si+ ion implantation at a dose of 1×1015 ions/cm2 at room temperature. The effective refractive indices of the waveguide propagation modes were measured by using a prism-coupling method after the annealing at 240°C for 60 min in air. Reflectivity calculation method (RCM) was applied to simulate the refractive index profile of the waveguide. It is found that relatively large positive change of ordinary refractive index happens in the guiding region. According to the reconstructed refractive index distribution, it is demonstrated that the fundamental mode operating at 1.06 μm can be confined in the Si+ ion-implanted Nd:YVO4 waveguide. Meanwhile, the pump threshold of laser oscillation is theoretically estimated.
杜国龙,李贵球,赵圣智,安静,李明,梁建,李涛,王伟。摘要:在室温下,以1×1015离子/cm2的剂量注入3.0 MeV的Si+离子,在x切割Nd:YVO4晶体中形成了平面波导。在空气中240℃退火60 min后,用棱镜耦合法测量了波导传播模式的有效折射率。采用反射率计算方法(RCM)模拟了波导的折射率分布。结果表明,在导光区,普通折射率发生较大的正变化。根据重构的折射率分布,证明了Si+离子注入Nd:YVO4波导中工作在1.06 μm的基模可以被限制。同时,从理论上估计了激光振荡的泵浦阈值。
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引用次数: 0
Extreme Value Characteristic of Dispersion Period Lengths on Dispersion Management Soliton in TIRPCF under Compton Scattering 康普顿散射下TIRPCF中色散管理孤子色散周期长度的极值特性
Pub Date : 2009-09-01 DOI: 10.1109/SOPO.2009.5230316
Yao-fu Heng, Xiao-fei Hao, D. Hao
Using the dispersion management soliton concept and inelastic collision model between an electron and a multi-photon group the extreme value characteristic of the dispersion period lengths in the total internal reflective photonic crystal fiber TIRPCF under multiphoton nonlinear Compton scattering. The result shows that there is a multi-extreme value system between the coupling pulse propagation distance and disturbance period and there is a better propagation passage to every extreme value. When the disturbance period is 0.2 the soliton propagation intensity is weaker and its scattering probability is littler. Along with the increasing of the propagation distance the scattering probability are increased. When the disturbance period is 0.4 the propagation passages of the soliton are thebest. Keywordsdispersion-managed soliton period disturbance many extreme values Compton scattering
利用色散管理孤子概念和电子与多光子群之间的非弹性碰撞模型,研究了全内反射光子晶体光纤在多光子非线性康普顿散射作用下色散周期长度的极值特性。结果表明,耦合脉冲传播距离与扰动周期之间存在多极值系统,每个极值处都有一条较好的传播通道。当扰动周期为0.2时,孤子的传播强度较弱,散射概率较小。随着传播距离的增加,散射概率增大。当扰动周期为0.4时,孤子的传播孔道最好。色散管理孤子周期扰动多极值康普顿散射
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引用次数: 0
期刊
2009 Symposium on Photonics and Optoelectronics
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