Chinese Optics Letters, 2005, 3 (6): 06367, Published Online: Jun. 6, 2006  

Measurements of pressure induced self-broadening and frequency shift coefficients of methane R9 manifold of 2ν3 band

Author Affiliations
State key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006
Abstract
An external-cavity diode laser (ECDL) has been used to investigate pressure-induced self-broadening as well as frequency shift of 2ν3 band R9 manifold of methane. A phase sensitivity detection technology has been employed to determine the pressure induced frequency shift coefficient, however, which is obtained by line shape analyses of the recorded absorption spectrum. F1 and F2 unresolved double lines near 6105.626 cm^(-1) were measured as an object because they are often used to the high sensitivity detection of trace methane. The results show that the self-broadening and pressure induced frequency shift coefficients are 0.0232(+-)0.003 and 0.0055(+-)0.0007 MHz/Pa, respectively.

Weiguang Ma, Lei Dong, Wangbao Yin, Linfeng Li, Lei Zhang, Suotang Jia. Measurements of pressure induced self-broadening and frequency shift coefficients of methane R9 manifold of 2ν3 band[J]. Chinese Optics Letters, 2005, 3(6): 06367.

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