Self-Q-switched and mode-locked 946 nm Cr,Nd:YAG laser

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• 作者：Qinan Li ; Sumei Wang ; Shifeng Du ; Yuxian Shi ; Jie Xing ; Dongxiang Zhang ; Baohua Feng ; Zhiguo Zhang ; Shiwen Zhang
• 关键词：Cr ; Nd ; YAG crystal ; Self-Q-switched and mode-locked ; Quasi-three-level
• 刊名：Optics Communications
• 出版年：2008
• 出版时间：15 April 2008
• 年：2008
• 卷：281
• 期：8
• 页码：2184-2188
• 全文大小：139 K

文摘

A simultaneous self-Q-switched and mode-locked diode-pumped 946 nm laser by using a Cr,Nd:YAG crystal as gain medium as well as saturable absorber is demonstrated for the first time as we know. The maximum average output power of 751 mW with a slope efficiency of 18.38 % is obtained at an intra-cavity average peak power intensity of 4.83 × 10⁶ W/cm². Under this circumstance, the repetition rate of Q-switched envelopes is 9.63 kHz and the pulse width is about 460 ns. Almost 100 % mode-locked modulation depth is obtained at all time in the experiment process whether the incident pump power is low or high. The repetition rate of mode-locked pulses within a Q-switched envelope is 135.13 MHz and the mode-locked pulse width is within 600 ps. The laser produces high-quality pulses in TEM₀₀-mode in the simultaneous self-Q-switched and mode-locked experiment.