提出了一种新型的连续激光振铃吸收光谱方法,采用由高反射率腔镜组成的谐振腔作气体吸收池,通过压电晶体对谐振腔以4 Hz频率进行扫描调制,对连续波激发光源在一定光谱范围内以0.001 Hz的低重复频率进行同步光谱扫描,让振铃腔与激光频率形成共振.通过探测腔模的透射峰光强,获得光谱信息.采用该技术在0.5 mbar的极低气压下,探测到CO2在6537 cm-1和6577 cm-1附近的弱吸收谱线(10-27-10-26cm-1/(molecule.cm-2),其检测灵敏度远高于常规红外吸收光谱方法,为气态原子、分子和离子的微量探测提供了高灵敏度的光谱分析方法.
参考文献
| [1] | Berden G, Peeters R, Meijer G. Cavity ring-down spectroscopy: experimental schemes and applications [J]. Int.Rev. Phys. Chem., 2000, 19(4): 565-607 |
| [2] | Newman S M, Lane I C, Orr-Ewing AJ et al. Integrated absorption intensity and Einstein coefficients for the O2a1△g - X3 ∑-g (0,0) transition: a comparison of cavity ringdown and high resolution Fourier transform spectroscopy with a long-path absorption cell [J]. J. Chem. Phys., 1999, 110(22): 10749-10757 |
| [3] | Ball S M, Povey I M, Norton E G et al. Boardband cavity ringdown spectroscopy of the NO3 radical [J]. Chem.Phys. Lett., 2001, 342(1-2): 113-120 |
| [4] | Hahn Jae Won, Yoo Yong Shim, Lee Jae Yong et al. Cavity ringdown spectroscopy with a continuous-wave Laser:calculation of coupling efficiency and a new spectrometer design [J]. Appl. Opt-LP, 1999, 38(9): 1859-1866 |
| [5] | He Yabai, Orr Brian J. Optical heterodyne signal generation and detection in cavity ringdown spectroscopy based on a rapid swept cavity [J]. Chem. Phys. Lett., 2001, 335(3-4): 215-220 |
| [6] | He Yabai, Orr Brian J. Ringdown and cavity-enhanced absorption spectroscopy using a continuous-wave tunable diode laser and a rapidly swept optical cavity [J]. Chem. Phys. Lett. 2000, 319(1-2): 131-137 |
| [7] | Richard E, von Gert H, Giel B et al. Phase shift cavity ring down absorption spectroscopy [J]. Chem. Phys. Lett., 1996, 262 (1-2): 105-109 |
| [8] | Romanini D, Kachanov A A, Sadeghi N et al. CW cavity ring down spectroscopy [J]. Chem. Phys. Lett., 1997,264(3-4): 316-322 |
| [9] | Romanini D, Kachanov A A, Stoeckel F. Diode laser cavity ring down spectroscopy [J]. Chem. Phys. Lett., 1997,270(5-6): 538-545 |
| [10] | Romanini D, Kachanov A A, Stoeckel F. Cavity ringdown spectroscopy: broad band absolute absorption measurements [J]. Chem. Phys. Lett., 1997, 270(5-6): 546-550 |
| [11] | O'Keefe Anthony, Scherer James J, Paul Joshua B. CW integrated cavity output spectroscopy [J]. Chem. Phys.Lett., 1999, 307(5-6): 343-349 |
| [12] | He Y, Hippler M, Quack M. High-resolution cavity ring-down absorption spectroscopy of nitrous oxide and chloroform using a near-infrared cw diode laser [J]. Chem. Phys. Lett., 1998, 289 (5-6): 527-534 |
| [13] | Levenson M D, Paldus B A, Spence T G et al. Optical heterodyne detection in cavity ring-down spectroscopy [J]. Chem. Phys. Lett., 1998, 290(4-6): 335-340 |
| [14] | Levenson M D, Paldus B A, Spence T G et al. Frequency-switched heterodyne cavity ringdown spectroscopy [J].Opt. Lett., 2000, 25(12): 920-922 |
| [15] | Ye J, Hall J L. Cavity ringdown heterodyne spectroscopy: high sensitivity with microwatt light power [J]. Phys.Rev. A, 2000, 61(6): 061802 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%