1. Changchun University of Science and Technology, College of Science, Changchun, Jilin 130022, China
2. National Institute of Metrology, Beijing 100029, China
3. Tsinghua University, Department of Precision Instrument, Beijing 100084, China
Abstract：Frequency-stabilized cavity ring-down spectroscopy is developed for tracing gas concentration with very high sensitivity and accuracy in recent years. However, line shape is the key factor affecting the concentration measurement based on the spectrum method. Using the frequency-stabilized cavity ring-down spectroscopy to study the N2-broadened CO lineshape for R12(3←0) line, six line profiles are used to investigate the relationship between the lineshape parameters. The results show that VP is not proper profile for describing the lineshape, pCqSDNGP is the best profile to obtain the parameters for CO absorption spectrum.
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2017, Vol. 38 
