Ultralow threshold green lasing and optical bistability in ZBNA (ZrF4–BaF2–NaF–AlF3) microspheres

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dc.contributor.authorWu, Yuqiang
dc.contributor.authorWard, Jonathan M.
dc.contributor.authorNic Chormaic, Síle
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderIrish Research Council for Science Engineering and Technologyen
dc.date.accessioned2011-02-24T13:10:17Z
dc.date.available2011-02-24T13:10:17Z
dc.date.copyright2010
dc.date.issued2010-02
dc.date.updated2010-10-12T09:54:30Z
dc.description.abstractUpconversion lasing and fluorescence from active microspheres fabricated from a novel fluorozirconate, Er3+ doped glass, ZBNA (ZrF4-BaF2-NaF-AlF3), when pumped at 978 nm via a tapered optical fiber is demonstrated. An ultralow, green lasing threshold of similar to 3 mu W for 550 nm emissions is measured. This is one order of magnitude lower than that previously reported for ZBLAN (ZrF4-BaF2-LaF3-AlF3-NaF) microspheres. Optical bistability effects in ZBNA microspheres are reported and the bistable mechanism is discussed and attributed to shifts of the whispering gallery modes due to thermal expansion of the sphere, where heating is achieved by optical pumping around 978 nm. The effect of the bistability on the upconversion lasing is examined and we report multiple bistability loops within the microspheres.en
dc.description.sponsorshipScience Foundation Ireland (Grant Nos. 02/IN1/128 and 07/RFP/PHYF518s2); IRCSET (Embark Initiative)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationWu, Y., Ward, J.M., Nic Chormaic, S., 2010. Ultralow threshold green lasing and optical bistability in ZBNA (ZrF4-BaF2-NaF-AlF3) microspheres. Journal of Applied Physics, 107(3), pp.033103-1 - 033103-6en
dc.identifier.doi10.1063/1.3277024
dc.identifier.endpage033103-6en
dc.identifier.issn0021-8979
dc.identifier.issn1089-7550
dc.identifier.issued3en
dc.identifier.journaltitleJournal of Applied Physicsen
dc.identifier.startpage033103-1en
dc.identifier.urihttps://hdl.handle.net/10468/226
dc.identifier.volume107en
dc.language.isoenen
dc.publisherAmerican Institute of Physicsen
dc.relation.urihttp://link.aip.org/link/doi/10.1063/1.3277024
dc.rights© 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Wu, Y., Ward, J.M., Nic Chormaic, S., 2010. Ultralow threshold green lasing and optical bistability in ZBNA (ZrF4-BaF2-NaF-AlF3) microspheres. Journal of Applied Physics, 107(3), pp.033103-1 - 033103-6 and may be found at http://link.aip.org/link/doi/10.1063/1.3277024en
dc.rights.urihttp://www.aip.org/aip/copyright.htmlen
dc.subjectThermal expansionen
dc.subjectOptical fabricationen
dc.subject.lcshLaser materialsen
dc.subject.lcshFluorescenceen
dc.subject.lcshSolid-state lasersen
dc.subject.lcshOptical bistabilityen
dc.subject.lcshOptical materialsen
dc.subject.lcshOptical pumpingen
dc.subject.lcshLaser beamsen
dc.titleUltralow threshold green lasing and optical bistability in ZBNA (ZrF4–BaF2–NaF–AlF3) microspheresen
dc.typeArticle (peer-reviewed)en
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