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Proceedings Paper

H2 stimulated Raman scattering in a multi-pass cell
Author(s): Xianglong Cai; Jingwei Guo; Canhua Zhou; Dongjian Zhou; Jinbo Liu; Zhe Shi; Hui Li; Shu Hu; Baodong Gai; Dong Liu; Yong Tan; Hongxing Cai; Yuqi Jin
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Paper Abstract

Stimulated Raman Scattering (SRS) is an effective means of laser wavelength conversion. Hydrogen is an excellent Raman medium for its high stimulated Raman gain coefficient and good flowability which can rapidly dissipate the heat generated by SRS process. In this paper we reported the H2 SRS in multiple-pass cell pumped by the fundamental frequency output of a Q-switched Nd: YAG laser. Two concave reflection mirrors (with 1000 mm curvature radius and 50 mm diameter) were used in our experiment, both mirrors with a hole near the edge and were positioned to form co-center cavity, therefore the laser could repeatedly pass and refocus in the Raman cell to achieve a high SRS conversion efficiency and reduce SRS threshold for pump laser. By changing the pass number (1~17) of optical path in the Raman cell and the pump power(0~2.5MW), the Stokes conversion efficiency is optimized. Experimental results indicated that the Raman threshold was 0.178MW and the highest photon conversion efficiency was 50 %.

Paper Details

Date Published: 3 February 2015
PDF: 7 pages
Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92552I (3 February 2015); doi: 10.1117/12.2065351
Show Author Affiliations
Xianglong Cai, Changchun Univ. of Science and Technology (China)
Dalian Institute of Chemical Physics (China)
Jingwei Guo, Dalian Institute of Chemical Physics (China)
Canhua Zhou, Dalian Institute of Chemical Physics (China)
Dongjian Zhou, Dalian Institute of Chemical Physics (China)
Jinbo Liu, Dalian Institute of Chemical Physics (China)
Zhe Shi, Changchun Univ. of Science and Technology (China)
Dalian Institute of Chemical Physics (China)
Hui Li, Dalian Institute of Chemical Physics (China)
Shu Hu, Dalian Institute of Chemical Physics (China)
Baodong Gai, Dalian Institute of Chemical Physics (China)
Dong Liu, Dalian Institute of Chemical Physics (China)
Yong Tan, Changchun Univ. of Science and Technology (China)
Hongxing Cai, Changchun Univ. of Science and Technology (China)
Yuqi Jin, Dalian Institute of Chemical Physics (China)


Published in SPIE Proceedings Vol. 9255:
XX International Symposium on High-Power Laser Systems and Applications 2014
Chun Tang; Shu Chen; Xiaolin Tang, Editor(s)

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