Abstract
A method for generating high-power, millijoule level single pulse energy optical vortex laser using a mode-selection slab resonator is proposed and experimentally demonstrated. The optical resonator forms a stable cavity with just two mirrors and a Nd: YAG laser slab, which is both streamlined and reliable. The mode-selection involves the tilt control of cavity mirrors and the radius control of the circular aperture in favor of the donut-shaped LG01 mode over others due to their different sensitivity to the resonator misalignment. By tuning the angle of the insert fused silica plate, nanosecond lasers in LG0,+1, and LG0,−1 modes are directly obtained with average power of 22.77 W and 21.85 W, and their pulse energies are 4.55 mJ and 4.37 mJ, respectively. The approach in this paper provides a concise solution for creating high-power vortex laser with slab resonator. Its potential for further power scaling holds promises for diverse applications, extending beyond industry manufacturing to fields like remote sensing, medical treatment, precision measurement, and scientific research.
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TLY and JY completed most of the manuscript writing and designed laser experiments. TLY and XPL completed the construction of the laser system. HW and ZZZ assisted in optimizing the laser and participated in testing, and YPW and XJW assisted in writing the manuscript. All authors reviewed the manuscript and provided their respective inputs.
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Yang, TL., Yang, J., Li, XP. et al. High power nanosecond optical vortex laser oscillation in mode-selection slab resonator. Appl. Phys. B 130, 92 (2024). https://doi.org/10.1007/s00340-024-08233-w
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DOI: https://doi.org/10.1007/s00340-024-08233-w