| Measurements of pressure induced self-broadening and frequency shift coefficients of methane R9 manifold of 2v_3 band |
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| 作者姓名： | 马维光 董磊 尹王保 李霖峰 张雷 贾锁堂 |
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| 作者单位： | State key Laboratory of Quantum Optics and Quantum Optics Devices College of Physics and Electronics Engineering，Shanxi University，Taiyuan 030006，State key Laboratory of Quantum Optics and Quantum Optics Devices College of Physics and Electronics Engineering，Shanxi University，Taiyuan 030006，State key Laboratory of Quantum Optics and Quantum Optics Devices College of Physics and Electronics Engineering，Shanxi University，Taiyuan 030006，State key Laboratory of Quantum Optics and Quantum Optics Devices College of Physics and Electronics Engineering，Shanxi University，Taiyuan 030006，State key Laboratory of Quantum Optics and Quantum Optics Devices College of Physics and Electronics Engineering，Shanxi University，Taiyuan 030006，State key Laboratory of Quantum Optics and Quantum Optics Devices College of Physics and Electronics Engineering，Shanxi University，Taiyuan 030006 |
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| 基金项目： | This work was partially supported by Excellent experts funds of development-plan council of Shanxi province and the Natural Science Funds of Shanxi province (No.20041037). |
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| 摘 要： | An external-cavity diode laser (ECDL) has been used to investigate pressure-induced self-broadening as well as frequency shift of 2v3 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.
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