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A research team, headed by Pan Shilie from the Xinjiang Technical Institute of Physics and Chemistry at the Chinese Academy of Sciences, has achieved a significant breakthrough in the realm of vacuum ultraviolet nonlinear optical crystal materials. They have successfully synthesized the ammonium borofluoride (ABF) crystal, overcoming the technical hurdles associated with growing large-sized crystals and processing them into devices. Leveraging birefringent phase-matching technology, the team has, for the first time ever, accomplished the direct frequency-doubling of a vacuum ultraviolet laser to a wavelength of 158.9nm. This breakthrough provides a crucial material for the development of all-solid-state vacuum ultraviolet lasers. Such an achievement is poised to have a profound impact on precision manufacturing and cutting-edge scientific research endeavors.
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