红外与激光工程
2022, 51(1): 20220017
Author Affiliations
Abstract
State key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006
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.
300.1030 absorption 170.4090 modulation techniques Chinese Optics Letters
2005, 3(6): 06367
