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High power and excellent beam quality rod Yb: YAG regenerative amplifier

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Abstract

This paper demonstrates a laser diode double-ended pumped Yb: YAG rod regenerative amplifier (RA) with an average power of 37 W, which substantially exceeds the performance of previously reported bulk Yb: YAG medium RAs. Compared to other bulk Yb: YAG medium RAs, we have introduced several enhancements in thermal management, such as employing a double-ended pump to reduce the temperature gradient inside the crystal, and the cooling efficiency is significantly enhanced by designed heat sink. As a result, the thermal effect is effectively suppressed. The system attains high average output power and power stability (RMS = 0.56%) at a pulse repetition rate of 400 kHz. In addition, the output beam maintains excellent quality even under varying high pump powers, demonstrating an \(M^2\) consistently below 1.1.

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Funding

This research was funded by National Natural Science Foundation of China (61925507, 62075227, 62205351, 22227901), Shanghai Rising-Star Program (21QA1410200), Youth Innovation Promotion Association CAS (2020248).

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Authors and Affiliations

  1. Department of Optics and Optical Engineering, University of Science and Technology of China (USTC), Hefei, 230026, China

    Guangxin Luo

  2. State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai, 201800, China

    Guangxin Luo , Jiajun Song, Yujie Peng, Yinfei Liu, Liya Shen, Jianyu Sun & Yuxin Leng

  3. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China

    Yinfei Liu & Jianyu Sun

  4. School of Physical Science and Technology, Shanghai Tech University, Shanghai, 201210, China

    Liya Shen

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Luo and Song wrote the manuscript, designed and completed the experiments; Liu, Shen, and Sun participated in the experiments; Leng and Peng provided guidance and financial support. All authors reviewed the manuscript.

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Correspondence to Jiajun Song, Yujie Peng or Yuxin Leng.

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Luo , G., Song, J., Peng, Y. et al. High power and excellent beam quality rod Yb: YAG regenerative amplifier. Appl. Phys. B 130, 93 (2024). https://doi.org/10.1007/s00340-024-08223-y

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