基于Lorentzian模型与伪Voigt模型的谱拟合算法的准确性比较  

Accuracy comparison of spectrum fitting algorithms based on Lorentzian model and pseudo-Voigt model

作　　者：莫巧灵 MO Qiaoling(Department of Electronic and Information Security,Guangxi Vocational College of Safety Engineering,Nanning 530100,China)

机构地区：[1]广西安全工程职业技术学院电子与信息安全系,南宁530100

出　　处：《光通信技术》2024年第1期46-50,共5页Optical Communication Technology

摘　　要：为了比较基于Lorentzian模型与伪Voigt模型的2种谱拟合算法的准确性,基于布里渊散射的分布式光纤传感原理,首先比较了实测布里渊谱的Lorentzian模型和伪Voigt模型的计算结果,然后通过伪Voigt模型数值生成了具有不同形状和信噪比的布里渊谱,并分别采用基于Lorentzian模型与伪Voigt模型的谱拟合算法计算了布里渊频移。最后,对这2种算法的准确性进行了比较。仿真结果表明,在不同布里渊谱形状和信噪比条件下,基于Lorentzian模型与伪Voigt模型的谱拟合算法的计算准确性相近,但前者的计算量小于后者。In order to compare the accuracy of two spectrum fitting algorithms based on the Lorentzian model and the pseudo-Voigt model,a distributed optical fiber sensing principle based on Brillouin scattering is used.Firstly,the calculation results of the measured Brillouin spectra using the Lorentzian model and the pseudo-Voigt model are compared.Then,The Brillouin spectrum with different shapes and signal-to-noise ratios is generated numerically through the pseudo-Voigt model,and the Brillouin frequency shift is calculated using spectral fitting methods based on the Lorentzian model and the pseudo-Voigt model,respectively.Finally,the accuracy of these two algorithms is compared.The simulation results show that underdifferent Brillouin spectrum shapes and signal-to-noise ratio conditions,the computational accuracy of the spectrum fitting algorithm based on the Lorentzian model and the pseudo-Voigt model is similar,but the former requires less computation than the latter.

关 键 词：布里渊谱 布里渊频移 分布式光纤传感 Lorentzian模型 伪Voigt模型 

分 类 号：TN247[电子电信—物理电子学]