Investigation of bend loss in multimode core-shell silver halide MIR fibres

In this paper, we describe the experimental study of bend losses in single-layer multimode silver halide polycrystalline fibres in a PEEK shell bent into a circle. The experiment was conducted for Ø 525-µm AgBr
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fibre over the bend radius range of 1.5-52.5 mm for the wavelength sweep of 4–25 µm, The revealed dependencies can be very useful for designing fibre-optic systems intended for measurements in restricted spaces.