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5-Hz, 150-TW Ti:sapphire Laser with High Spatiotemporal Quality

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Abstract

150-TW, 23-fs laser pulses with high spatial and temporal qualities have been generated at 5 Hz from a chirped-pulse amplification Ti:sapphire laser. The temporal and the spatial qualities of the laser pulse were optimized and characterized for high availability in the fields of high-field science and relativistic laser-matter interactions. The pulse duration was optimized by maximizing the spectral bandwidth and by minimizing the spectral phase error. A temporal contrast was enhanced using an ultrafast Pockels cell and a double plasma mirror, and wavefront aberrations were corrected using an adaptive optics system. Spatiotemporal couplings were characterized by measuring a frequency-resolved wavefront to estimate their effect on the peak intensity at the focus. Due to the high spatiotemporal quality resulting from this optimization and characterization of the laser beam, the 5-Hz 150-TW Ti:sapphire laser will be the workhorse for a variety of research on relativistic laser-matter interactions.

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Acknowledgments

The work was supported by the Institute for Basic Science, South Korea under the project code, IBS-R012-D1 and by GIST Research Institute (GRI) grant funded by the GIST, South Korea in 2020.

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Correspondence to Seong Ku Lee.

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Sung, J.H., Yoon, J.W., Choi, I.W. et al. 5-Hz, 150-TW Ti:sapphire Laser with High Spatiotemporal Quality. J. Korean Phys. Soc. 77, 223–228 (2020). https://doi.org/10.3938/jkps.77.223

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  • DOI: https://doi.org/10.3938/jkps.77.223

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