Chinese Optics Letters, 2014, 12 (3): 031902, Published Online: Mar. 17, 2014   

Optimization of quadrature frequency conversion with type-II KDP for second harmonic generation of the nanosecond chirp pulse at 1053 nm Download: 543次

Author Affiliations
1 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Shanghai institute of laser plasma, Chinese academy of engineer and physics, Shanghai 201800, China
Abstract
A second harmonic generation system with two type II KDP crystals in quadrature is optimized for the nanosecond chirp pulse. The acceptance bandwidth of this optimizing scheme is close to 10 nm by using two crystals with slightly opposite angular detuning from phase matching and the conversion efficiency can reach 70% for top-hat chirp pulse at ~2 GW/cm2 in theory. The preliminary experimental results are obtained on the 9th beam of Shen Guang II SGII laser system, and the performance of optimization is partially verified.

Lailin Ji, Baoqiang Zhu, Chong Liu, Tao Wang, Zunqi Lin. Optimization of quadrature frequency conversion with type-II KDP for second harmonic generation of the nanosecond chirp pulse at 1053 nm[J]. Chinese Optics Letters, 2014, 12(3): 031902.

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