该文建立了考虑激光线宽影响后腔衰荡的多指数吸收模型,推导出对数衰荡函数的多项式拟合公式.“,”A multiexponential model of cavity ring down absorption spectroscopy is established for taking into account the laser linewidth effects.It is demonstrated that by fitting the logarithmic ring down function to a truncated polynomial,absorption coefficent can be extracted from coefficients of the first as well as higher order terms of the fitted polynomial.The new fit model results in higher accuracy and broader dynamic range than the previous ...