脉冲Nd:YAG三倍频激光(355 nm)泵浦CH4的受激拉曼散射第一级斯托克斯光(395.6 nm)用作NO2差分吸收激光雷达的λon.为研究CH4的受激拉曼散射效应和定量解释其物理机理作了数值模拟计算,并作了一系列的实验.通过调节泵浦能量、光束质量和气体压强,得到了各级散射光的能量转化效率与三者间的函数关系,找到了第一级斯托克斯光的优化条件.
The first Stokes radiation (S1,395.6 nm) of SRS of CH4, pumped by a pulsed Nd:YAG laser at 355nm, is used as λon of NO2-DIAL. A numerical study is done, aiming to explain qualitatively the practically important physical behavior of the configurations. And a series of experiments are reported here on the generation of Stokes orders generated in CH4. By adjusting pumping laser energy, beam quality and the pressure of gas, the relationship between them and the energy conversion efficiency of scattering radiations is obtained. Finally, the appropriate condition to optimize S1 is found.
参考文献
| [1] | Wu Yonghua, Yue Guming, et al. Stimulated Raman scattering pumped by fourth harmonic Nd:YAG laser and its application in laser radar [J]. Chinese J. Lasers (中国激光), 2000, A 27:823-827 (in Chinese). |
| [2] | Xu Ben, Yue Guming, et al. Generation of UV laser light by stimulated Raman scattering in D2, D2/Ar and D2/He using a pulsed Nd:YAG laser at 355 nm [J]. Chin. Phys., 2003, 12: 1021-1025. |
| [3] | Schoulepnikoff L, Mitev V, et al. Experimental investigation of high-power single-pass Raman shifters in the ultraviolet with Nd:YAG and KrF lasers [J]. Appl. Opt., 1997, 36: 5026-5043. |
| [4] | Haner D A, Mcdermid I S. Stimulated Raman shifting of the Nd:YAG fourth harmonic (266 nm) in H2, HD, andD2 [J]. IEEE J. Quantum Electron., 1990, 26: 1292-1298. |
| [5] | Sentrayan K, Major L, et al. Observation of intense stokes and anti-Stokes lines in CH4 pumped by 355nm of a Nd:YAG laser [J]. Appl. Phys., 1992, B55: 311-318. |
| [6] | Chu Zhiping, Upendra N S, Thomas D W. Multiple Stokes wavelength generation in H2, D2, and CH4 for lidar aerosol measurements [J]. Appl. Opt., 1991, 30: 4350-4357. |
| [7] | Schoulepnikoff L, Mitev V. Hihg-gain single-pass stimulated Raman scattering and four-wave mixing in a focused beam geometry: a numerical study [J]. Pure Appl. Opt., 1996, 6: 277-302. |
| [8] | Heuvel J C, Putten F J M, Lerou R J L. Experimental and numerical study of stimulated Raman scattering in an astigmatic focus [J]. IEEE J. Quantum Electron., 1993, 29: 2267-2272. |
| [9] | Lou Qihong. Research on the characteristics of H2 Raman conversion pumping by a 1-J XeCl excimer laser [J].J. Appl. Phys., 1989, 66: 2265-2273. |
| [10] | Newton J H, et al. Numerical model of multiple-Raman-shifting excimer lasers to the blue-green in H2 [J]. Opt.Lett., 1981, 6: 125. |
| [11] | Bjorklund G C. Effects of focusing on third-order nonlinear processes in isotropic media [J]. IEEE J. Quantum Electron., 1975, QE-11: 287-296. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%