High energy and high stability Cr:YAG passively Q-switched laser with convex-ARR unstable resonator |
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Authors: | Feng-Tie Wu Wen-Zhen Zhang |
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Institution: | Department of Physics, Hua Qiao University, Quanzhou, Fujian 362011, People's Republic of China |
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Abstract: | A convex-ARR (Anti-resonant Ring) unstable resonator was introduced in a Cr4+:YAG passively Q-switched Nd:YAG pulsed laser. There are two novel features in this cavity, one is the unstable resonator increasing output energy and improving laser mode; the other is the ARR structure efficiently enhancing the laser stability. A high energy and high stability Q-switched pulse with a single pulse energy of 85.6 mJ, a pulse width of 38 ns and an energy stability of 99.6% was obtained. The experimental results were analyzed well by using the mechanism of transient grating and the properties of the unstable resonator. |
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Keywords: | Cr4+ Unstable resonator Q-switch |
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