Double-Arched LDA Stagger-Pumped Electro-Optic Q-Switched Nd:YAG Green Laser Using KTP Double-Crystal Extracavity Frequency Doubling

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• 作者：Li Yue ; Chen Xinyu ; Yu Yongji ; Wang Chao…
• 关键词：solid ; state laser ; green laser ; extra cavity frequency doubling ; double ; crystal KTP
• 刊名：Journal of Russian Laser Research
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：37
• 期：6
• 页码：598-603
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Optics, Lasers, Photonics, Optical Devices; Microwaves, RF and Optical Engineering;
• 出版者：Springer US
• ISSN：1573-8760
• 卷排序：37

文摘

We develop a laser utilizing second harmonic generation that exhibits both high single-pulse energy and high beam quality. The system starts with a double-arched laser-diode-array stagger-pumped electro-optic Q-switched Nd:YAG with a thermal lensing compensated convex-concave resonator. The 1,064 nm output beam is then frequency doubled in an extracavity KTP double-crystal assembly that offsets birefringence walk-off. We obtain a maximum single-pulse energy of 72.7 mJ at 532 nm with 176 mJ at 1,064 nm. The corresponding optical-to-optical conversion efficiency is 41.3%, and the pulse width is 9.2 ns at a repetition rate of 20 Hz. The beam quality factor M2 is 1.83 in both horizontal and vertical directions at the maximum output energy, and the energy stability is better than 3% across half an hour.