LAUSR

Abstract The article is devoted to the study of the influence of mechanical vibration on optical properties of polycrystalline two-layer fibers based on solid solutions of silver halides. It is experimentally established that after exposure to vibration for 22 h with a frequency of F = 50 Hz, and an amplitude оf a = 1.1 mm using vibration protection, the transparency range is expanded towards shorter wavelengths. We also observed an increase in optical transparency compared to the initial by 60 - 10% in the range of 3–5 μm, respectively, in the absence of changes in the longer-wavelength region of transparency of the IR fiber 7–20 μm. This effect in the studied IR fibers is explained by the conversion under the action of vibration of a polycrystalline structure into a nano-subcrystalline one.