Laser dual-wavelength interferometric measurement of the structure and refractive parameters of carbon tetrachloride
Laser dual-wavelength interferometric measurement of the structure and refractive parameters of carbon tetrachloride
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DOI：
10.1016/s0925-3467(97)00015-3
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发表时间：
1997-09-01
影响因子：
3.9
通讯作者：
Elkashef, H
中科院分区：
文献类型：
--
作者：
Elkashef, H
采用双波长激光马赫-曾德尔干涉技术测量了重要的激光染料溶剂四氯化碳（CTC）的折射率及其温度梯度。使用波长分别为514.5nm和632.8nm的氩和He-Ne激光器。应用麦克斯韦方程和洛仑兹-洛仑兹方程，计算了晶体的结构参数（光学介电常数、介电常数的热系数、比折射率和摩尔折射率、极化率、分子半径、常数偶极矩、弛豫时间、阻抗、介电常数和摩尔折射率）。等），在两个波长下计算溶剂的浓度。使用折射率及其随温度的梯度的测量数据进行计算。另一方面，确定了折射率随密度的梯度。计算了CTC在不同温度下的光学介电常数、密度和摩尔极化率。利用Caushy方程推导了折射率和介电常数随波长的变化关系。使用Murphy-Alpert方程计算折射率梯度（dn/dT）和介电常数梯度（d λ/dT）与波长的关系。此外，还绘出了柯西方程常数A和B随温度的变化曲线。准确性，灵敏度和讨论的细节。(C)1997年Elsevier Science B.V.
The dual-wavelength laser Mach-Zehnder interferometric technique was used for measuring the refractive index and its gradient with temperature for the important laser dye solvent carbon tetrachloride (CTC). The Argon and He-Ne laser, at wavelengths 514.5 nm and 632.8 nm respectively, are used. Applying Maxwell's and Lorentz-Lorenz equations, the structure parameters (optical permittivity, thermal coefficient of permittivity, specific and molar refraction, polarizability, molecular radius, constant dipole moment, relaxation time, impedance, ... etc), of the solvent are calculated at the two wavelengths. The calculations are carried out using the measured data for the refractive index and its gradient with temperature. On the other hand the refractive index gradient with density was determined. Accordingly the optical permittivity, density and molar polarization of CTC at different temperatures were calculated. Using Caushy's equation the refractive index and permittivity as a function of wavelength were deduced. The gradient of refractive index (dn/dT) and hence the gradient of permittivity (d epsilon/dT) versus wavelength are calculated using Murphy-Alpert's equation. In addition the constants A and B of Cauchy equation are plotted as a function of temperature. Accuracy, sensitivity and discussions are treated in details. (C) 1997 Elsevier Science B.V.