Self-induced pressure shift and temperature dependence measurements of CO₂ at 2.05 ¦Ìm with a tunable diode laser spectrometer

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• 作者：Jingsong Li ; Georges Durry ; Julien Cousin ; Lilian Joly ; Bertrand Parvitte ; Virginie Zeninari  ; ;   ; ^{virginie.zeninari@univ-reims.fr}
• 关键词：Carbon dioxide ; Near-infrared ; Self-induced shifts ; Temperature dependence ; TDLAS
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：2012
• 出版时间：January 2012
• 年：2012
• 卷：85
• 期：1
• 页码：74-78
• 全文大小：494 K

文摘

By using a high resolution tunable diode laser absorption spectrometer combined with a cryogenically cooled optical multi-pass cell, we have measured the self-induced pressure shift coefficients for 8 transitions in the R branch of the (20⁰1)_III ?(00⁰0)_I band of carbon dioxide around 2.05 ¦Ìm. This spectral region is of particular interest for the monitoring of atmospheric CO₂ with Differential Absorption Lidars (DiAL). The measurement of these shift coefficients was realized at five different temperatures ranging from 218 to 292 K in order to determine their temperature dependence. The results are thoroughly compared to previous values reported in the literature for the (20⁰1)_III ?(00⁰0)_I band of CO₂. The temperature dependence of the self-induced pressure shifts are reported experimentally for the first time for this specific CO₂ band.