MIR imaging bundles of ordered silver halide polycrystalline fibres for thermal transmission and imaging
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MIR imaging bundles of ordered silver halide polycrystalline fibres for thermal transmission and imaging Elena Korsakova1 · Sarah Markham2 · Aladin Mani2 · Christophe Silien2 · Joanna Bauer3 · S. A. M. Tofail2 · Liya Zhukova1 · Aleksandr Korsakov1 Received: 31 August 2019 / Accepted: 7 May 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract In this study, we propose a way for miniaturization of mid-infrared (MIR) fibre bundles while maintaining low crosstalk and transmission losses. Such miniaturization of fibres is important when applying MIR in thin polycrystalline AgCl0.25Br0.75 fibres with a diameter of 110 µm, made using custom-designed extrusion components. These fibres were then mechanically assembled in an optical bundle of seven hexagonally arranged fibres. Transmission of MIR from a heat source through this bundle was compared with similar bundle of seven fibres with a diameter of 300 µm. It was found that both bundles are transparent to MIR in the spectral range of 2–20 µm corresponding to temperature range from –130 to + 1150 °C. They also have low crosstalks (
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