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 w...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/cm^2 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.展开更多
基金supported by the National Science and Technology Major Project of the Ministry of Science and Technology of China under Grant No.1229241A00
文摘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/cm^2 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.
