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Lett."],"published-print":{"date-parts":[[2022,4,1]]},"abstract":"<jats:p>Ultraviolet solid-state light sources, especially in the short-wave ultraviolet band, are attracting great attention for potential applications in high-density optical data storage, biomedical research, and water and air purification and sterilization. As one of the means to generate solid-state short-wavelength lasers, upconversion technology, which can transform a low-energy photon to a high-energy photon, has a simple structure and does not require strict phase-matching conditions. However, because of the high non-radiative decay rate during multiphoton absorption process, the short-wave upconversion ultraviolet lasing is still difficult to achieve. Here, under 450<jats:italic toggle=\"yes\">\u2005<\/jats:italic>nm blue laser excitation, we have successfully obtained ultraviolet C random lasing from a Pr<jats:sup>3+<\/jats:sup> doped YPO<jats:sub>4<\/jats:sub> single crystal via two-photon absorption. 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