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A 61-mJ, 1-kHz cryogenic Yb: YAG laser amplifier |
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| Affiliation: | 1.Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Advanced Material Diagnostic Technology, and College of Engineering Physics, Shenzhen Technology University(SZTU), Shenzhen 518118, China;2.College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China |
| Abstract: | We report a diode-pumped rod-type Yb:YAG laser amplifier operating at 1 kHz. Cryogenic cooling method was adopted to make the Yb:YAG crystal work with four-level behavior. A single-frequency fiber laser acts as the seed in an actively Q-switched Yb:YAG oscillator. The resonator delivers 5.75-mJ pulses at 1 kHz with a pulse duration of approximately 40 ns. The pulses were amplified to 61 mJ in a four-pass rod-type Yb:YAG amplifier with optical-to-optical efficiency of 24% in the main amplifier. The M2 parameter of the output laser is <1.4. |
| Keywords: | ytterbium laser system Yb:YAG laser amplifier cryogenic laser amplification high energy laser amplification |
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