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Loss minima in two fluoride glass and chalcogenide glass fibres were calculated. The intrinsic losses are predicted to be 1 × 10−3 dB/km at 3.4 μm for BaF2-GdF3-ZrF4 glass fibre, 1 × 10−2 dB/km at 2.7 μm for BaF2-CaF2-YF3-AlF3 glass fibre and 1 × 10−2 dB/km at 4.5 μm for GeS3 glass fibre.
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Shibata et al. (1981) studied this question.
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