High Efficiency Double-Pass-Pumped 2 m Periodically
Poled MgO:LiNbO₃ Optical Parametric Oscillator¹

G. Y. He, J. Guo, Z. X. Jiao*, and B. Wang

State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering,
Sun Yat-sen University, Guangzhou 510275, China

*e-mail: jiaozhx@mail.sysu.edu.cn

Received January 16, 2012; published online May 11, 2012

Abstract—A high efficiency near-degenerate periodically poled MgO:LiNbO₃ optical parametric oscillator
pumped by a nanosecond Nd:YVO₄ laser is demonstrated. Under a 1.064 m pump power of 7.2 W, an output
power of 5.3 W with an optical-to-optical conversion efficiency of 74% and a slope efficiency of 82% in the
2m region is obtained in a double-pass-pumped doubly resonant geometry at 20 kHz repetition rate.

DOI: 10.1134/S1054660X12060059

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