lonizing radiation-resistant optical fibre amplifier

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An amplifying or laser optical fibre comprises a central core suitable for transmitting and amplifying an optical signal and an optical cladding surrounding the central core and suitable for confining the transmitted optical signal within the core. The core has a matrix and contains rare-earth-doped silica-based nanoparticles. Each nanoparticle contains at least 85% by weight (85 wt%) silica. Such a fibre can be used in an environment with strong ionizing radiation with limited optical losses.