Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/137089
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dc.contributor.authorSidharthan, Raghuramanen_US
dc.contributor.authorJi, Junhuaen_US
dc.contributor.authorLim, Kang Jieen_US
dc.contributor.authorLim, Serene Huitingen_US
dc.contributor.authorLi, Huizien_US
dc.contributor.authorLua, Jian Weien_US
dc.contributor.authorZhou, Yanyanen_US
dc.contributor.authorTse, Chun Hoen_US
dc.contributor.authorHo, Darylen_US
dc.contributor.authorSeng, Yue Menen_US
dc.contributor.authorChua, Song Liangen_US
dc.contributor.authorYoo, Seongwooen_US
dc.date.accessioned2020-02-21T06:20:23Z-
dc.date.available2020-02-21T06:20:23Z-
dc.date.issued2018-
dc.identifier.citationSidharthan, R., Ji, J., Lim, K. J., Lim, S. H., Li, H., Lua, J. W., . . ., Yoo, S. (2018). Step-index high-absorption Yb-doped large-mode-area fiber with Ge-doped raised cladding. Optics Letters, 43(23), 5897-5900. doi:10.1364/OL.43.005897en_US
dc.identifier.issn0146-9592en_US
dc.identifier.urihttps://hdl.handle.net/10356/137089-
dc.description.abstractWe report an all-solid large-mode-area (LMA) step-index fiber offering high absorption and low core numerical aperture (NA) by introducing a highly ytterbium-doped P:Al core and germanium-doped cladding. The fiber provides core absorption of ∼1200  dB/m at 976 nm with a low 0.07 core NA, due to the raised Ge cladding. Furthermore, matched profiles of P and Al across the core are successfully obtained with high concentration of Yb2O3 around 0.4 mol%. The fiber characteristics are routinely achievable by conventional modified chemical vapor deposition with a solution doping technique. A highly efficient laser with >100  W output power, 86% slope efficiency with respect to launched pump power, and a mean M2 of 1.34 has been demonstrated using the fabricated LMA step-index fiber. We also report 80% laser slope efficiency with 58 W output power (pump power limited) within only 0.5 m of the fiber when pumped by a wavelength-stabilized laser diode.en_US
dc.language.isoenen_US
dc.relation.ispartofOptics lettersen_US
dc.rights© 2018 Optical Society of America. All rights reserved. This paper was published in Optics Letters and is made available with permission of Optical Society of America.en_US
dc.subjectEngineering::Electrical and electronic engineeringen_US
dc.titleStep-index high-absorption Yb-doped large-mode-area fiber with Ge-doped raised claddingen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.contributor.organizationThe Photonics Instituteen_US
dc.contributor.organizationCentre of Optical Fibre Technologyen_US
dc.identifier.doi10.1364/OL.43.005897-
dc.description.versionAccepted versionen_US
dc.identifier.pmid30499969-
dc.identifier.scopus2-s2.0-85057490619-
dc.identifier.issue23en_US
dc.identifier.volume43en_US
dc.identifier.spage5897en_US
dc.identifier.epage5900en_US
dc.subject.keywordsFiber Design and Fabricationen_US
dc.subject.keywordsFiber Measurementsen_US
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