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Diode-pumped passively Q-switched YAG/Yb:YAG laser with Cr4+:YAG as a saturable absorber |
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| Authors: | Wanjiang Zheng Tongguo Chen Haibo Liu |
| Institution: | 1. College of Mechanical & Vehicle Engineering, Changchun University, Changchun, 130022, China 2. NanYang Radio and TV University, NanYang, 473066, China 3. Changchun Institute of Optics, Fine Mechanics, and Physics Chinese Academy of Sciences, Changchun, 130033, China |
| Abstract: | We design an efficient passively Q-switched laser using a composite YAG/Yb:YAG crystal as the laser gain medium and a Cr4+:YAG crystal as a saturable absorber. We obtain an average output power of 1.81 W in 1030 nm laser at an absorbed pump power of 4.8 W, corresponding to an optical-to-optical efficiency of 37.7% and a slope efficiency of 47.3%. The pulsed laser has a repetition rate of about 28.6 kHz and a pulse width of 15.8 ns, with the highest peak power of 4 kW. In addition, using a LBO as the intracavity frequency doubler, we obtain a maximum power of 246 mW in 515 nm pulsed laser at an absorbed pump power of 3.8 W. |
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