Investigation of continuous-wave and Q-switched microchip laser characteristics of Yb:YAG ceramics and crystals

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• 作者：Jun Dong^a ; ^b ; ^{jdong@xmu.edu.cn} ; Guozhang Xu^a ; Jian Ma^a ; Mengjun Cao^a ; Ying Cheng^a ; Ken-ichi Ueda^b ; Hideki Yagi^c ; Alexander A. Kaminskii^d
• 关键词：Yb ; YAG ; Ceramics ; Single-crystal ; Passively Q-switched ; Polarization states
• 刊名：Optical Materials
• 出版年：2012
• 期刊代码：81_09253467
• 类别：ch
• 出版时间：April, 2012
• 卷：34
• 期：6
• 页码：959-964
• 文件大小：627 K

摘要

Continuous-wave and passively Q-switched microchip laser performance of Yb:YAG ceramics and single-crystals was investigated. Highly efficient continuous-wave Yb:YAG laser performance was observed at 1030 nm and 1049 nm for both Yb:YAG ceramics and crystals with different transmissions of output couplers. The laser performance of Yb:YAG ceramic is comparable to that of Yb:YAG single crystal. Meanwhile, the laser performance of laser-diode pumped Yb:YAG/Cr⁴⁺:YAG all-ceramics- and all-crystals-combination passively Q-switched microchip lasers were investigated. Sub-nanosecond laser pulses with peak power over 150 kW were obtained with different Yb:YAG/Cr⁴⁺:YAG combinations. Linearly polarized laser was observed in Yb:YAG/Cr⁴⁺:YAG all-crystals combination and circular polarized laser was obtained in Yb:YAG/Cr⁴⁺:YAG all-ceramics combination. The best laser performance was obtained with Yb:YAG/Cr⁴⁺:YAG all-crystals combination.