中国激光, 2018, 45 (9): 0911002, 网络出版: 2018-09-08
光腔衰荡光谱方法测量分子的高精密谱线参数 
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Precise Parameters of Molecular Absorption Lines from Cavity Ring-Down Spectroscopy
图 & 表
图 4. (a)不同压力下0.8 mm附近一氧化碳R(5)跃迁谱线;(b)采用Voigt线型拟合光谱得到的拟合残差
Fig. 4. (a) R(5) CO transition at 0.8 mm under different pressures; (b) residuals fitted from Voigt profile
图 5. 12C16O所有测量谱线对应的(a)压力位移系数和(b)自碰撞加宽系数,其中P支谱线对应于m=-J,R支谱线对应于m=J+1
Fig. 5. (a) Pressure shift coefficients and (b) self-broadening coefficients for 12C16O transitions with m=-J for the P(J) lines and m=J+1 for the R(J) lines
图 6. 在39.8 kPa 压力下采用不同线型拟合氢分子的Q3(1)跃迁谱线。(a)圆点为实验测量得到的谱线,实线为采用Galatry线型拟合得到的谱线;(b)~(e)采用Voigt,SDVP(速度依赖的Voigt),Rautian,Galatry线型拟合光谱得到的拟合残差
Fig. 6. H2 Q3(1) transition at 39.8 kPa fitted with different profiles. (a) Experimental data (the dot line) fitted with Galatry profile (the solid line); residuals between Galatry profile and those from (b) Voigt;(c) SDVP; (d) Rautian; (e) Galatry profiles
图 7. (a)不同压力下测得氢分子的Q3(1)跃迁谱线;(b)不同压力下谱线相对位置与样品压力的线性关系;(c)不同压力下谱线拟合得到积分面积与样品压力关系
Fig. 7. (a) H2 Q3(1) transition measured with different pressures; (b) linear dependence of the relative line positions with corresponding sample pressures; (c) linear dependence of the integral areas with corresponding sample pressures
图 8. (a)测量得到谱线位置与计算值的比较,理论计算值来自文献[ 61],理论计算位置精度为0.0025 cm-1;(b)测量结果谱线强度值与计算值的比较理论计算值来自文献[ 61],精度为0.1%;另外实验测量值来自文献[ 62-63]
Fig. 8. (a) Line position comparison between this work and theoretical calculations from Ref. [61]; (b) line intensity comparison between this work and theoretical ones from Ref. [61] as well as other experimental results from Ref. [62-63]
图 9. 一氧化碳R(10)谱线在0.2~1.5 Pa压力条件下的测量光谱谱线
Fig. 9. CO R(10) transition measured at the pressure range of 0.2-1.5 Pa
表 1CO分子跃迁频率测量误差分析
Table1. Uncertainty analysis of frequency measurements for CO transitionkHz
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谈艳, 王进, 陶雷刚, 孙羽, 刘安雯, 胡水明. 光腔衰荡光谱方法测量分子的高精密谱线参数[J]. 中国激光, 2018, 45(9): 0911002. Tan Yan, Wang Jin, Tao Leigang, Sun Yu, Liu Anwen, Hu Shuiming. Precise Parameters of Molecular Absorption Lines from Cavity Ring-Down Spectroscopy[J]. Chinese Journal of Lasers, 2018, 45(9): 0911002.
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