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dc.contributor.authorCoucheron, David Andre
dc.contributor.authorFokine, Michael
dc.contributor.authorPatil, Nilesh
dc.contributor.authorBreiby, Dag Werner
dc.contributor.authorBuset, Ole Tore
dc.contributor.authorHealy, Noel
dc.contributor.authorPeacock, Anna
dc.contributor.authorHawkins, Thomas A.
dc.contributor.authorJones, Maxwell
dc.contributor.authorBallato, John
dc.contributor.authorGibson, Ursula
dc.identifier.citationNature Communications 2016, 7:13265nb_NO
dc.description.abstractGlass fibres with silicon cores have emerged as a versatile platform for all-optical processing, sensing and microscale optoelectronic devices. Using SiGe in the core extends the accessible wavelength range and potential optical functionality because the bandgap and optical properties can be tuned by changing the composition. However, silicon and germanium segregate unevenly during non-equilibrium solidification, presenting new fabrication challenges, and requiring detailed studies of the alloy crystallization dynamics in the fibre geometry. We report the fabrication of SiGe-core optical fibres, and the use of CO2 laser irradiation to heat the glass cladding and recrystallize the core, improving optical transmission. We observe the ramifications of the classic models of solidification at the microscale, and demonstrate suppression of constitutional undercooling at high solidification velocities. Tailoring the recrystallization conditions allows formation of long single crystals with uniform composition, as well as fabrication of compositional microstructures, such as gratings, within the fibre core.nb_NO
dc.publisherNature Publishing Groupnb_NO
dc.rightsNavngivelse 3.0 Norge*
dc.titleLaser recrystallization and inscription of compositional microstructures in crystalline SiGe-core fibresnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.journalNature Communicationsnb_NO
dc.description.localcodeThis work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit

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