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

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 componen...

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Bibliographic Details
Published inChinese physics B Vol. 26; no. 8; pp. 181 - 184
Main Author 亓宏伟 孙玉祥 王正平 张栩朝 于法鹏 孙洵 许心光 赵显
Format Journal Article
LanguageEnglish
Published 01.08.2017
Subjects
ADP
二次谐波
变换器
晶体相
激光损伤阈值
激光输出
级联型
非线性光学系数
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Summary: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.
Bibliography: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.
Hong-Wei Qi1,2, Yu-Xiang Sun1,2, Zheng-Ping Wang1,2, Xu-Zhao Zhang1,2, Fa-Peng Yu1,2, Xun Sun1,2, Xin-Guang Xu1,2, and Xian Zhao1,2 （1 State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China 2Key Laboratory of Functional Crystal Materials and Devices （Shandong University）, Ministry of Education, Jinan 250100, China）
third-harmonic-generation, ADP crystal, polarization, ultraviolet laser
11-5639/O4
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/26/8/084201