Investigation of the effect of mechanical vibration on optical properties when transmitting infrared radiation through sliver halide fibers

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.