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Optically stimulated luminescence (OSL) was studied in undoped and rare‐earth doped fluoride–phosphate glass. Following exposure to 90Sr/90Y β‐radiation, the samples demonstrated strong OSL in the 350–600 nm wavelength range. Here, we explore the effects of fabrication conditions and rare‐earth dopants on the OSL. We found that the OSL intensity increases linearly with radiation dosage, indicating the suitability of fluoride–phosphate glass as a dosimeter material.

The accepted version of an article is the version that incorporates all amendments made during the peer review process, but prior to the final published version (the Version of Record, which includes; copy and stylistic edits, online and print formatting, citation and other linking, deposit in abstracting and indexing services, and the addition of bibliographic and other material.Self-archiving of the accepted version is subject to an embargo period of 12-24 months. The embargo period is 12 months for scientific, technical, and medical (STM) journals and 24 months for social science and humanities (SSH) journals following publication of the final article.• the author's personal website • the author's company/institutional repository or archive • not for profit subject-based repositories such as PubMed Central Articles may be deposited into repositories on acceptance, but access to the article is subject to the embargo period.The version posted must include the following notice on the first page: "This is the peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving."The version posted may not be updated or replaced with the final published version (the Version of Record). Authors may transmit, print and share copies of the accepted version with colleagues, provided that there is no systematic distribution, e.g. a posting on a listserve, network or automated delivery.There is no obligation upon authors to remove preprints posted to not for profit preprint servers prior to submission. May 2017Surface analysis and treatment of extruded fluoride phosphate glass preforms for optical fibre fabrication Abstract Fabrication of fluoride phosphate glass optical fibres using the extrusion method for preform fabrication has been studied using the commercial Schott N-FK51A glass. The extrusion step was found to create a surface layer of differing composition from the bulk glass material, leading to defects drawn down onto the optical fibre surface during fibre fabrication, resulting in high loss and fragile fibres. Similar phenomena have also been observed in other fluoride-based glasses. Removal of this surface layer from preforms prior to fibre drawing was shown to improve optical fibre loss from >5 dB/m to 0.5 -1.0 dB/m. The removal of this surface layer is therefore necessary to produce low-loss fluoride phosphate optical fibres.

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