共查询到20条相似文献,搜索用时 87 毫秒
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基于Kirchoff定律,利用半导体激光器及钽酸锂热电器件设计了一种实用化的实时测温系统.根据待测目标的光谱辐出度及相对测温灵敏度随λT的变化关系,确定了系统工作波长的大致范围;通过对水冷遮蔽板的尺寸及其放置位置与波长间的关系、以及对大气的红外透射谱等的分析,确定了系统的工作波长;按照水冷遮蔽板的尺寸及其放置位置(H/R之值)对测温精度的影响,讨论了水冷遮蔽板的H/R之值,并由此分析了系统的抗干扰能力及测温精度.指出了引起系统测温不确定度的5种主要原因,并对其中的2种进行了简要的分析.实验结果表明,该系统的测温精度优于0.3%. 相似文献
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新概念高能激光武器的研究与发展已有四十多年的历史。第一代高能激光武器主要采用连续波化学激光器,其输出功率可达百万瓦。第二代高能激光武器主要采用了波长更短的节能固体激光器件,其输出功率为100kW。与第一代高能化学激光武器采用超高能量直接烧毁杀伤目标不同,第二代高能固体激光武器寻求节能型杀伤方式,即以最小程度的破坏来实现致命杀伤的效果。随着高能激光武器的发展和实战部署,作为高能激光武器核心的高能激光系统总体性能参数(能量/功率、激光波形、光束质量、近场和远场的强度分布、光束指向稳定性、光谱和偏振特性等)的计量和测试显得尤为重要。文中围绕新概念高能激光武器的历史、研究现状和未来发展展开论述。高能激光武器系统的研制对强激光光学计量检测技术提出的新要求和挑战有助于推进强激光光学计量检测技术的发展。 相似文献
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研制了用于测量二级轻气炮毫米级弹丸速度的遮挡式激光测速系统。该系统主要包括测速平台和激光测速仪,采用红光半导体激光器作光源,硅光电二极管为光电探测器。测速平台安装于炮管测速段,具有结构简单紧凑、抗振动、激光光幕易于准直和测量等特点。激光光幕高度为20 mm,避免了弹丸偏离轴线过多时因无法遮断光束导致的测速失败。运用该测速系统进行了一系列二级轻气炮测速实验,成功测量了金属弹丸和非金属弹丸的速度,测速范围为1.58~4.51 km/s。将测量数据与磁测速系统测量数据进行比较,结果表明,该激光测速系统的测量精度高、稳定性好、灵敏度高、抗干扰性强、适用范围广。 相似文献
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对40K-87Rb原子冷却的半导体激光系统提出了一种实验方案,并进行了初步实验.采用三台外腔光栅反馈半导体激光器(ECDL)、四台注入锁定从激光器和一台半导体激光放大器组成激光系统.三台ECDL通过声光调制器产生四束光,分别作为40K和87Rb原子的冷却光和再抽运光,四束不同频率成分的激光分别注入锁定四台从激光器,然后Rb冷却光、K冷却光和K再抽运光再同时注入半导体激光放大器进行放大.该装置可同时产生冷却40K和87Rb原子的冷却光和再抽运光,结构紧凑、工作稳定. 相似文献
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一种高精度光纤测温系统工作波长的优化设计 总被引:3,自引:0,他引:3
基于基尔霍夫定律 ,利用钽酸锂热释电探测器设计了一种实用化的双波长、高精度光纤测温系统。依照测温系统中单个探测器的温度分辨力、R(T)~T曲线的线性度、R(T)~T曲线的温度灵敏度及其相对温度灵敏度与各主要技术参量之间的关系 ,对采用钽酸锂热释电探测器作光电转换器件实现的实用化实时测温系统的工作波长进行了优化设计。实验表明 ,在测温范围 4 0 0~ 130 0℃内 ,当系统工作在λ1=2 .1μm、λ2 =2 .3μm时 ,其温度灵敏度高于 1.0× 10 -4℃ -1,相对温度灵敏度不低于 0 9,测温精度不低于 0 15 %。均符合设计要求 相似文献
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研制了一种可在野外使用的光轴平行性测量仪器,该仪器利用热靶技术进行1.06μm激光谱段到3~5μm、8—12μm红外谱段的转换,实现了对光电跟踪测量设备25MW强激光发射器光轴与红外传感器光轴间的平行性误差测量。仪器的设计主体采用完全对称的结构和积木式的组装方式,保证了仪器在野外恶劣环境下保持测量精度不变。通过巧妙地利用电磁开关控制,实现了仪器靶面的远距离控制转换。装调工艺和检测措施确保了仪器的测量精度,并通过各种环境试验验证了仪器的可靠性。对仪器精度和环境适应性测试表明,该仪器测量精度达到10",并可在-30℃-+60℃的条件下,保持精度≤10"。 相似文献
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杨氏弹性模量测量仪的改进 总被引:1,自引:0,他引:1
测定杨氏弹性模量的实验是大学物理实验课的重要实验之一,通过反复多次的实验探索,对杨氏弹性模量测量仪的关键性组件——光杠杆进行了有效改进从而彻底消除了光杠杆易翻落摔坏的隐患,使更换镜片方便,反射像十分易于寻找,实验效果非常明显. 相似文献
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Todd B. Sauke Joseph F. Becker 《Journal of Quantitative Spectroscopy & Radiative Transfer》2005,91(4):453-484
The instrument response function (IRF) of a spectrometer limits the accuracy of measured spectroscopic parameters by broadening recorded spectral lines/features. We describe methods to model the effects of the IRF on spectral data, to minimize the IRF widths, and to measure the resulting width of the spectrometer IRF. We have modeled the IRF of our Tunable Diode Laser Spectrometer as a Voigt function. A real-time method of eliminating the effects of low-frequency spectrometer drift has been implemented and has resulted in a substantial reduction in the width of the IRF, its residual Gaussian component reduced from about to about . An accurate measurement of the IRF Gaussian width utilizes a computationally simple method making use of the spectral dependence of the RMS noise of each signal-averaged data point. Various noise sources affecting the spectrometer (preamp/detector noise, laser AM noise, and laser FM noise) are identified and separately quantified by use of the same method. The IRF Gaussian-width measurement can be automatically applied to each measured spectrum of an experimental data set. A related method is discussed which allows accurate determination of the spectral dependence of statistical noise appropriate for use in quantitative Chi-square fitting of absorption spectra. We explore simple, efficient numerical processes which can dramatically enhance the quality and usefulness of acquired spectral data, improving the ability to apply TDL spectroscopy to high-precision, quantitative measurements and the determination of detailed spectroscopic lineshape parameters. This paper provides a guide for interested readers to implement these developments in their own spectrometers. 相似文献
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激光二极管反馈干涉的实验观测 总被引:5,自引:2,他引:5
利用LabView软件虚拟示波器和信号源,观测了激光二极管反馈干涉实验现象.实验证明反馈回激光二极管的光的入射方向和入射光强以及信号处理电路的带宽,对反馈干涉信号有很大的影响. 相似文献
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P. Glas M. Naumann A. Schirrmacher H. R. Mü ller V. Reichel S. Unger 《Fiber and Integrated Optics》1997,16(1):103-113
A novel method is described that enables the prediction of the main laser parameters (threshold pump power, output power, slope- and extraction efficiency) without having realized the laser itself. The emitted fluorescence power of an end-on pumped fiber is absolutely measured along the fiber. Using specific material parameters of the doped glass and the waveguide attenuation, we calculate the laser properties without taking the resonator losses into account. This approach is extremely useful for fibers with special design parameters. We have used this method to characterize a fiber with a novel design, the M-profile fiber. Combining the results with the measurements on the realized laser, the impact of resonator losses (e.g., tilted fiber endfaces, effects of butt-coupled mirrors) can be inferred and improvements can be undertaken. 相似文献
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P. Glas M. Naumann A. Schirrmacher H. R. Müller V. Reichel S. Unger 《Fiber and Integrated Optics》2013,32(1):103-113
Abstract A novel method is described that enables the prediction of the main laser parameters (threshold pump power, output power, slope- and extraction efficiency) without having realized the laser itself. The emitted fluorescence power of an end-on pumped fiber is absolutely measured along the fiber. Using specific material parameters of the doped glass and the waveguide attenuation, we calculate the laser properties without taking the resonator losses into account. This approach is extremely useful for fibers with special design parameters. We have used this method to characterize a fiber with a novel design, the M-profile fiber. Combining the results with the measurements on the realized laser, the impact of resonator losses (e.g., tilted fiber endfaces, effects of butt-coupled mirrors) can be inferred and improvements can be undertaken. 相似文献