Passively Q-switched and mode-locked dual-wavelength Nd:GGG laser with Cr⁴⁺:YAG as a saturable absorber

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• 作者：Hongwei Chu ; Shengzhi Zhao ; Yufei Li ; Kejian Yang ; Guiqiu Li ; Dechun Li ; Jia Zhao ; Wenchao Qiao ; Tao Li ; Chuansheng Feng ; Haijuan Zhang
• 关键词：Nd ; GGG crystal ; Dual-wavelength ; QML laser
• 刊名：Optics Communications
• 出版年：15 March, 2014
• 年：2014
• 卷：315
• 期：Complete
• 页码：8-11
• 全文大小：727 K

文摘

By using neodymium-doped gadolinium gallium garnet (Nd:GGG) as a laser medium, a simultaneously passively Q-switched and mode-locked (QML) dual-wavelength laser with Cr⁴⁺:YAG as a saturable absorber is presented. The laser simultaneously oscillated at 1061 nm and 1063 nm, corresponding to a frequency difference of 0.53 THz. QML pulses with nearly 100% modulation depth were observed. The mode-locked pulse duration underneath the Q-switched envelope was estimated to be about 908 ps. The experimental results indicated that the dual-wavelength QML Nd:GGG laser can be an excellent candidate for the generation of THz waves.