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首页> 外文期刊>Japanese journal of applied physics >Nd~(3+)- and Cr~(3+)-Doped Yttrium Aluminum Garnet Ceramic Pulse Laser Using Cr~(4+)-Doped Yttrium Aluminum Garnet Crystal Passive Q-Switch
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Nd~(3+)- and Cr~(3+)-Doped Yttrium Aluminum Garnet Ceramic Pulse Laser Using Cr~(4+)-Doped Yttrium Aluminum Garnet Crystal Passive Q-Switch

机译：Nd〜（3 +）-和Cr〜（3+）掺杂钇铝石榴石陶瓷无源Q开关的脉冲陶瓷

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摘要

A passively Q-switched Nd~(3+)-and Cr~(3+) -doped yttrium aluminum garnet (YAG) ceramic laser using Cr~(4+):YAG crystal as a Q-switch element is reported for the first time. Unique temporal waveforms of the output laser pulses were observed. A temporal waveform of a Q-switched laser pulse was compared with one in a free-running pulse. Laser pulses of 130-300 ns duration were generated. A maximum output laser energy of 1.1 J and an average peak power of 0.1 MW were obtained for multiple Q-switched pulses by a single shot, and a maximum output laser energy of 80 mJ was obtained for a single pulse. The evaluated maximum peak power was 0.6 MW as determined from measured pulse energy and duration. The effective saturation fluence and maximum stored energy were lower than those of Nd:YAG. However, a high peak power can be obtained using an output coupler with a low reflectivity owing to the high gain as in the case of Nd:YAG. The threshold of the Nd/Cr:YAG ceramic laser oscillator is reduced to less than 10% of that of a Nd:YAG oscillator. It was determined by calculation that the output laser energy of the Nd/Cr:YAG ceramic laser was close to 4 times that of Nd:YAG.
机译：首次报道了使用Cr〜（4 +）：YAG晶体作为Q开关元件的无源Q开关Nd〜（3+）和Cr〜（3+）掺杂钇铝石榴石（YAG）陶瓷激光器。时间。观察到输出激光脉冲的唯一时间波形。将Q开关激光脉冲的时间波形与自由运行脉冲中的一个进行比较。产生了130-300 ns持续时间的激光脉冲。一次单脉冲获得多个Q开关脉冲的最大输出激光能量为1.1 J，平均峰值功率为0.1 MW，单个脉冲获得的最大输出激光能量为80 mJ。根据测得的脉冲能量和持续时间确定，评估的最大峰值功率为0.6 MW。有效饱和通量和最大储能均低于Nd：YAG。但是，与Nd：YAG一样，由于增益高，因此使用反射率低的输出耦合器可以获得高峰值功率。 Nd / Cr：YAG陶瓷激光振荡器的阈值降低到小于Nd：YAG振荡器的阈值的10％。通过计算确定，Nd / Cr：YAG陶瓷激光器的输出激光能量接近Nd：YAG的4倍。

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  • 来源
    《Japanese journal of applied physics》 |2009年第12期|122501.1-122501.7|共7页
  • 作者

    Taku Saiki; Shinji Motokoshi; Kazuo Imasaki; Kana Fujioka; Hidetugu Yoshida; Hisanori Fujita; Masahiro Nakatsuka; Chiyoe Yamanaka;

  • 作者单位

    Institute for Laser Technology, 1-8-4 Utsubo-honmachi, Nishi-ku, Osaka 550-0004, Japan;

    Institute for Laser Technology, 1-8-4 Utsubo-honmachi, Nishi-ku, Osaka 550-0004, Japan;

    Institute for Laser Technology, 1-8-4 Utsubo-honmachi, Nishi-ku, Osaka 550-0004, Japan;

    Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan;

    Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan;

    Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan;

    Institute for Laser Technology, 1-8-4 Utsubo-honmachi, Nishi-ku, Osaka 550-0004, Japan;

    Institute for Laser Technology, 1-8-4 Utsubo-honmachi, Nishi-ku, Osaka 550-0004, Japan;

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