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The energy scaling in a side-pumped ultra-low-magnification unstable resonator by employing a compact master oscillator power amplifier

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Abstract

The energy scaling for a diode-side-pumped passively Q-switched Nd:YAG laser in an ultra-low-magnification unstable convex–concave resonator is investigated. Theoretical analysis and experimental results indicate the fact that the energy scaling is restricted by the increasing of side-pumping sources inside the resonator because of the significant pump-to-mode size mismatching. It is verified that employing the master oscillation power amplifier can effectively enlarge the output pulse energy and improve the beam quality. Up to 60-mJ pulse energy with 17-MW peak power is obtained at a pump energy of 520 mJ. A 1573-nm eye-safe laser emission with pulse energy up to 25 mJ is further attended via the extracavity optical parametric oscillator.

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Acknowledgments

The authors thank the Ministry of Science and Technology for their financial support of this research under Contract No. MOST-105-2112-M-009-012.

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Authors and Affiliations

  1. Department of Electrophysics, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu, Taiwan

    C. Y. Cho & K. W. Su

  2. Department of Physics, Soochow University, Taipei, Taiwan

    Y. P. Huang

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  1. C. Y. Cho
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  3. K. W. Su
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Correspondence to K. W. Su.

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Cho, C.Y., Huang, Y.P. & Su, K.W. The energy scaling in a side-pumped ultra-low-magnification unstable resonator by employing a compact master oscillator power amplifier. Appl. Phys. B 122, 261 (2016). https://doi.org/10.1007/s00340-016-6535-4

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  • DOI: https://doi.org/10.1007/s00340-016-6535-4

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