共查询到19条相似文献,搜索用时 109 毫秒
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反射相移对光学玻璃电流传感器抗电磁干扰能力的影响 总被引:1,自引:0,他引:1
在光学玻璃电流传感器中,如果光线反射转向时在光的p,s分量之间引入反射相移,则会对该传感器的抗电磁干扰能力产生不良影响,本文对这种情况进行了理论上的分析,并给出了数值模拟和实验的结果。 相似文献
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埋入式光纤法布里—珀罗温度和应变传感器模型研究 总被引:2,自引:0,他引:2
研究了埋入式内置和外置型法布里-珀罗光纤传感器模型,这一框蒋 传感器中应变和温度的变化同反射光强联系起来,其中;子模型Ⅰ建立了传感器内的温度与应变同传感器长度变化及传感器光学性质变化的函数关系;子模型Ⅱ建立了传感器长度和光学性质的变化同反射光强变化的函数关系。 相似文献
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研究了埋入式内置和外置型法布里-珀罗(Fabry-Perot)光纤传感器模型,这一模型将传感器中应变和温度的变化同反射光强联系起来,其中:子模型Ⅰ建立了传感器内的温度与应变同传感器长度变化及传感器光学性质变化的函数关系;子模型Ⅱ建立了传感器长度和光学性质的变化同反射光强变化的函数关系 相似文献
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光纤法布里-珀罗(F-P)传感器反射光谱的对比度直接影响解调精度,利用模式耦合理论分析了端面倾斜角度对F-P传感器的反射光谱对比度以及信号强度的影响。通过理论和试验证明:随着光纤端面倾斜角度的增大,反射光谱对比度迅速下降,当角度达到5°以上时,反射光谱无法解调。 相似文献
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将CD光盘的聚碳酸酯基底纳米条纹作为光子晶体传感器,考察了其传感性质。在40~120℃温度范围内,CD光子晶体的反射光谱强度由64.5%上升到99.1%,且温度与反射光谱强度的变化呈线性响应,相关系数R2为0.999 5。结果表明,该聚碳酸酯光子晶体膜可以作为温度传感器。另外,还考察了不同的有机醇对传感器的反射光谱强度的影响。发现在甲醇中,最大反射率与作用时间呈线性关系,在乙醇、正丙醇、正丁醇中也有同样的规律,不同醇的介电常数与反射光谱强度也有线性关系,表明本传感器还可以作为醇的检测手段。 相似文献
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反射相移色散对OCS灵敏度影响的理论研究 总被引:5,自引:3,他引:2
以琼斯矩阵为数学工具,利用理论分析和计算机仿真的方法研究了单层保偏反射膜反射相移的色散特性及其对光学电流传感器灵敏度的影响.在光学电流传感器系统中,光源的驱动电流与环境温度改变,都会造成光源峰值波长移动.由于反射膜上产生的反射相移的色散特性,会使光学电流传感器的灵敏度随光源波长的变化而改变.研究结果表明,反射相移的色散特性会对输出曲线的尺度因子产生明显的影响.因此,光源的恒温控制与光源驱动电流的恒流控制是必要的. 本研究结果可为光学电流传感器的研究设计人员提供有用的参考. 相似文献
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反射相移对Faraday电流传感器灵敏度及稳定性影响的理论分析 总被引:1,自引:0,他引:1
光学法拉第电流传感器内的反射相移能降低传感器的灵敏度与稳定性。本文对此效应给予了定量的理论分析。 相似文献
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This paper presents an electro-optic modulated circular heterodyne modified Mach–Zehnder interferometer and a convenient two-phase signal-processing algorithm for the measurement of variations in the magnitude of phase retardation and the angle of principal axis in optical materials. The developed method solves the problems of normalized intensity jump and limited phase retardation measurement range associated with the circular heterodyne interferometer proposed previously. The present method uses a saw-tooth wave signal to drive an electro-optic (EO) modulator, and employs a lock-in amplifier to demodulate the principal axis angle and the phase retardation. Specifically, this paper considers two main sources of measurement errors, namely the misorientation of the EO modulator and the reflection phase retardation of the beam splitter. Furthermore, the study develops calibration procedures and identifies a means to minimize measurement errors induced by the reflection phase retardation of the beam splitter. 相似文献
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F. Bielsa A. Dupays M. Fouché R. Battesti C. Robilliard C. Rizzo 《Applied physics. B, Lasers and optics》2009,97(2):457-463
In this paper we present a review of the existing data on interferential mirror birefringence. We also report new measurements
of two sets of mirrors that confirm that mirror phase retardation per reflection decreases when mirror reflectivity increases.
We finally developed a computational code to calculate the expected phase retardation per reflection as a function of the
total number of layers constituting the mirror. Different cases have been studied and we have compared computational results
with the trend of the experimental data. Our study indicates that the origin of the mirror intrinsic birefringence can be
ascribed to the reflecting layers close to the substrate. 相似文献
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A diode ring cavity incorporating Faraday rotators and a variable phase retarder has been constructed aiming at achieving dual-frequency lasing operation with orthogonal linear polarizations. The orthogonal-polarization oscillations were observed in the 0.8-μm region with various operation wavelengths by changing the applied retardation. Furthermore the output power definitely depended on the applied retardation. Its dependence was theoretically studied, and the gain analysis taking into consideration the reflection at the laser diode amplifier facets was in good accordance with the experimental results. 相似文献
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A novel type of corner reflector for the reflection of surface plasmon polariton (SPP) is proposed. The reflector consists
of two layers of compensatory media whose permittivity and permeability take opposite signs to that of the corresponding layer
of the SP waveguide. By rigorously solving Maxwell's equations, the reflected SPP is proved to exist. The transverse wave
vector of the reflected SPP is always antiparallel to that of the incident SPP and no phase retardation is introduced. 相似文献
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理论研究和数值模拟研究表明激光在等离子体中诱导的等离子体密度调制可以起类似布拉格反射镜的作用,使得后面的入射光在等离子体平均密度远低于临界密度的区域就对入射光产生相位反射.相位反射的发生会影响激光在等离子体中的传播,例如激光在等离子体中相对传播时会出现激光场空洞现象.进一步的理论和数值模拟研究表明,相位反射持续发生的时间以及反射率的高低与等离子体的密度、等离子体区域的长度、激光强度以及脉宽等因素密切相关,这些都会对激光在等离子体中的传输产生影响.
关键词:
相位反射
密度调制
激光等离子体
粒子模拟 相似文献
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S. De Nicola P. Ferraro A. Finizio G. Pierattini 《Applied physics. B, Lasers and optics》1995,60(4):405-407
We describe an optical heterodyne polarization interferometer that can be efficiently used for the precision measurement of the change in the state of polarization of a light wave induced by polarizing optical devices. This technique is used to measure the change with wavelength of the phase retardation of a quarter-wave plate. A theoretical derivation is presented to permit computation of the wavelength dependence of the phase shift induced by a quarter-wave plate. 相似文献