基于吸收光谱的光程长度测量方法研究

发布时间：2018-05-20 22:11

本文选题：光程长度测量 + 直接吸收谱　；参考：《光谱学与光谱分析》2017年09期

【摘要】：基于吸收光谱的基本原理,通过计算比尔-朗伯定律数学表达式中的参数实现了光程长度的测量。分析了高斯线型、洛伦兹线型和Voigt线型,采用了Voigt线型对光谱信号进行拟合。研究了Voigt线型峰值计算方法、洛伦兹线宽计算和误差函数求解三个内容。利用可调谐半导体激光吸收谱技术(TDLAS)中的直接吸收谱技术测量了氧气的吸收光谱,得到拟合的光谱峰值数据。将峰值数据带入比尔-朗伯定律数学表达式中,计算出实验光程长度为66.55cm。对比测量值66.04cm,测量精度为0.78%,该方法用于光程长度测量是可行的。
[Abstract]:Based on the basic principle of absorption spectrum, the measurement of optical path length is realized by calculating the parameters in the mathematical expression of Bear-Lambert 's law. The Gao Si, Lorentz and Voigt lines are analyzed, and the spectral signals are fitted by Voigt. The calculation method of Voigt linear peak value, the calculation of Lorentz linewidth and the solution of error function are studied. The absorption spectra of oxygen were measured by direct absorption spectroscopy in tunable semiconductor laser absorption spectroscopy (TDLAS), and the fitted peak spectral data were obtained. The peak value data is introduced into the mathematical expression of Bill Lambert's law and the experimental optical path length is calculated to be 66.55 cm. The measured value is 66.04 cm and the measuring accuracy is 0.78. This method is feasible for the measurement of optical path length.
【作者单位】：中国人民解放军装备学院激光推进及其应用国家重点实验室;
【基金】：国家自然科学基金项目(11404191)资助
【分类号】：O433.1

【相似文献】