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H. T. Huang, J. L. He, S. D. Liu, J. F. Yang, B. T. Zhang, and F. Q. Liu, “Efficient ... T. Tao, S. J. Zhang, and H. J. Zhang, “A KTiOAsO4 Raman laser,” Appl. Phys.
Simultaneous pulse generation of orthogonally polarized dual-wavelength at 1091 and 1095 nm by coupled stimulated Raman scattering Haitao Huang,1 Deyuan Shen,1 and Jingliang He2,* 2

1 School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Ji’nan 250100, China *[email protected]

Abstract: Intracavity coupled Raman conversions in KTP and KTA driven by a laser diode (LD) pumped Nd:YAG/Cr4+:YAG 1064 nm laser is demonstrated in this paper. Simultaneous pulse generation of orthogonally polarized dual-wavelength at 1091 and 1095 nm are achieved by balancing the Raman gain of KTP and KTA. Under the LD pump power of 8.1 W, the maximum average output powers at 1091 and 1095 nm are 170 and 150 mW, respectively. The corresponding pulse width and repetition rate are measured to be 3.3 ns and 11.2 kHz, with the pulse peak powers calculated to be 4.6 and 4.1 kW, respectively. The laser source with such small wavelength separation and orthogonal polarization provides the interest for terahertz generation in the 1 THz range. Our study provides a simple and flexible method to achieve orthogonally polarized dual-wavelength laser source by Raman-based intracavity coupled nonlinear frequency conversions. ©2012 Optical Society of America OCIS codes: (140.3480) Lasers, diode-pumped; (190.4400) Nonlinear optics, materials; (190.5650) Nonlinear optics, Raman effect.

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(C) 2012 OSA

Received 4 Oct 2012; accepted 9 Nov 2012; published 29 Nov 2012

3 December 2012 / Vol. 20, No. 25 / OPTICS EXPRESS 27838

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