Cascaded third-harmonic-generation converter based on a single ADP crystal  

作　　者：亓宏伟 孙玉祥 王正平 张栩朝 于法鹏 孙洵 许心光 赵显 

机构地区：[1]State Key Laboratory of Crystal Materials Shandong University Jinan 250100,China [2]Key Laboratory of Functional Crystal Materials and Devices(Shandong University),Ministry of Education,Jinan 250100,China

出　　处：《Chinese Physics B》2017年第8期181-184,共4页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.61178060,51202129,and 91022034);the Independent Innovation Foundation of Shandong University,China(Grant No.2011GN056);the Natural Science Foundation for Distinguished Young Scholar of Shandong Province,China(Grant No.2012JQ18)

摘　　要：Based on a specially designed optical structure, an efficient cascaded third-harmonic-generation（THG） output of a 1064-nm, pico-seconds pulse laser is successively realized by using an NH_4H_2PO_4（ADP） crystal that acts as the secondharmonic-generation component and sum-frequency-generation component. The maximum THG output is 1.61 mJ, and the highest conversion efficiency from 1064 nm to 355 nm reaches 35%, which are obviously superior to the results obtained using a KDP crystal under the same circumstance. The further phase-matching analysis indicates that this THG configuration of ADP crystal can be applied to various fundamental wavelengths in a range of 1 μm–1.1 μm. Compared with the previously reported KDP THG converter, which is based on a similar principle, the present ADP THG converter is favorable for large-energy, high-efficiency operation because of the larger effective nonlinear optical coefficient deffand higher laser damage threshold.Based on a specially designed optical structure, an efficient cascaded third-harmonic-generation（THG） output of a 1064-nm, pico-seconds pulse laser is successively realized by using an NH_4H_2PO_4（ADP） crystal that acts as the secondharmonic-generation component and sum-frequency-generation component. The maximum THG output is 1.61 mJ, and the highest conversion efficiency from 1064 nm to 355 nm reaches 35%, which are obviously superior to the results obtained using a KDP crystal under the same circumstance. The further phase-matching analysis indicates that this THG configuration of ADP crystal can be applied to various fundamental wavelengths in a range of 1 μm–1.1 μm. Compared with the previously reported KDP THG converter, which is based on a similar principle, the present ADP THG converter is favorable for large-energy, high-efficiency operation because of the larger effective nonlinear optical coefficient deffand higher laser damage threshold.

关 键 词：third-harmonic-generation ADP crystal POLARIZATION ultraviolet laser 

分 类 号：TN771[电子电信—电路与系统]