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Express"],"published-print":{"date-parts":[[2023,4,10]]},"abstract":"<jats:p>In this paper, we demonstrate the laser characterization of Cr:ZnS\/Se polycrystalline gain media in non-selective unpolarized, linearly polarized, and twisted mode cavities. Lasers were based on post-growth diffusion-doped, commercially available antireflective-coated Cr:ZnSe and Cr:ZnS polycrystals with a length of 9 mm. The spectral output of lasers based on these gain elements in non-selective unpolarized and linearly polarized cavities was measured to be broadened to \u223c20-50\u2005nm due to the spatial hole burning (SHB) effect. SHB alleviation in the same crystals was realized in the \u201ctwisted mode\u201d cavity, with linewidth narrowing to \u223c80-90 pm. 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