Stimulated Rotational Raman Scattering at Multiwavelength
under TEA CO₂ Laser Pumping with a Multiple-Pass Cell¹

D. J. Li^a, *, G. L. Yang^a, F. Chen^a, J. J. Xie^a, L. M. Zhang^a, J. Guo^a,
C. L. Shao^a, Z. Q. Peng^b, and Q. P. Lu^b

^a State Key Laboratory of Laser Interaction with Matter, Changchun Institute of Optics, Fine Mechanics and Physics,
Chinese Academy of Sciences, Changchun, 130033 China

^b State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics,
Chinese Academy of Sciences, Changchun, 130033 China

*e-mail: lidj0906@163.com

Received November 23, 2011; in final form, December 5, 2011; published online April 3, 2012

Abstract—Stimulated rotational Raman scattering (SRRS) at multiwavelength pumped by TEA CO₂ laser was
demonstrated in this paper. Raman mediums were cooled by liquid-N₂ and a multiple-pass cell (MPC) with 25
passes was designed and used. When the para-H2 was pumped by single-longitudinal-mode (SLM) circular
polarized TEA CO₂ laser on 10P(20), 9P(20), and 10R(20), 50 mJ 16.95 m, 350 mJ 14.44 m, and 536 mJ
16.9 m radiations were obtained, corresponding to energy conversion efficiency of 1.2, 11.7, and 13.4%,
respectively. When the ortho-D₂ was pumped by CO₂ laser on 10R(18), 108 mJ 12.57 m Raman laser was
obtained with energy conversion efficiency of 2.9%.

DOI: 10.1134/S1054660X12050167

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