Luminescence properties of chlorine molecules in glassy SiO2 and optical fibre waveguides

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dc.contributor.authorSkuja, Linards
dc.contributor.authorKajihara, Koichi
dc.contributor.authorSmits, Krisjanis
dc.contributor.authorAlps, Kalvis
dc.contributor.authorSilins, Andrejs
dc.contributor.authorTeteris, Janis
dc.date.accessioned2020-07-08T16:33:52Z
dc.date.available2020-07-08T16:33:52Z
dc.date.issued2017
dc.descriptionThe support from Latvian Research Program IMIS 2, project “Photonics and materials for photonics” is acknowledged. K.K. was partially supported by the Collaborative Research Project of Materials and Structures Laboratory, Tokyo Institute of Technology. The publication costs of this article were covered by the Estonian Academy of Sciences and the University of Tartu.en_US
dc.description.abstractGlassy SiO2 is the basic material for optical fibre waveguides and manufacturing-induced Cl impurities reduce their transparency in UV spectral range. This work reports in-depth study/spectroscopic parameters of the near-infrared (1.23 eV) low-temperature photo-luminescence (PL) of interstitial Cl2 molecules in SiO2. The zero-phonon line position was estimated at 2.075 eV on the basis of anharmonicity of Cl2 PL vibronic data. The vibronic sub-bands are broadened by coupling to phonons and by an additional contribution from the glassy disorder. The Huang‒Rhys factor is ≈13. The PL decay time is between 1 and 10 ms in the temperature range 100 K‒13 K and can be reproduced by 3 exponents. Cl2 PL retains relatively high quantum yield and its characteristic structured shape, when the temperature is increased from 13 K to the liquid nitrogen temperature. This allows using it conveniently as a high-sensitivity diagnostic tool for detecting Cl2 impurities in optical fibre waveguides. Time-resolved measurements of optical fibre waveguides indicate that the lower detection limit is below 1010 Cl2/cm3.en_US
dc.description.sponsorshipTokyo Institute of Technology, MSD K.K.,Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART².en_US
dc.identifier.doi10.3176/proc.2017.4.23
dc.identifier.issn1736-6046
dc.identifier.urihttps://dspace.lu.lv/dspace/handle/7/52354
dc.identifier.urihttps://www.kirj.ee/public/proceedings_pdf/2017/issue_4/proc-2017-4-455-561.pdf
dc.language.isoengen_US
dc.publisherEstonian Academy Publishersen_US
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/739508/EU/Centre of Advanced Material Research and Technology Transfer/CAMART²en_US
dc.relation.ispartofseriesProceedings of the Estonian Academy of Sciences;66 (4)
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectphotonicsen_US
dc.subjectamorphous SiO2en_US
dc.subjectluminescenceen_US
dc.subjectCl2 impuritiesen_US
dc.subjectoptical fibresen_US
dc.subjectResearch Subject Categories::NATURAL SCIENCES:Physicsen_US
dc.titleLuminescence properties of chlorine molecules in glassy SiO2 and optical fibre waveguidesen_US
dc.typeinfo:eu-repo/semantics/articleen_US
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