{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T16:38:27Z","timestamp":1786552707462,"version":"build-2736575974"},"reference-count":16,"publisher":"Optica Publishing Group","issue":"16","license":[{"start":{"date-parts":[[2027,8,12]],"date-time":"2027-08-12T00:00:00Z","timestamp":1818028800000},"content-version":"am","delay-in-days":365,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#AM"},{"start":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T00:00:00Z","timestamp":1786492800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"name":"J.E. Sirrine Foundation"},{"DOI":"10.13039\/100000181","name":"United States Air Force Office of Scientific Research","doi-asserted-by":"crossref","award":["FA8655-25-1-7033"],"award-info":[{"award-number":["FA8655-25-1-7033"]}],"id":[{"id":"10.13039\/100000181","id-type":"DOI","asserted-by":"crossref"},{"id":"https:\/\/ror.org\/011e9bt93","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Opt. Lett."],"published-print":{"date-parts":[[2026,8,15]]},"abstract":"<jats:p>\n                    New glass compositions and fiber designs are sought to improve thulium fiber laser efficiency, simplify fiber structure, and increase output power\/energy. Herein, a gallosilicate fiber laser operating at moderate output power levels is demonstrated for proof-of-concept purposes. The fiber has a core composition of 3.6\u2009wt% Ga\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>3<\/jats:sub>\n                    and 2.0\u2009wt% Tm\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>3<\/jats:sub>\n                    , yielding an NA of 0.18. A simple fiber laser cavity is constructed with a high reflector and a flat fiber cleave. 8\u2009W output at 2030\u2009nm is achieved in a 7\u2009m long fiber, with an uncorrected launched power slope efficiency of 34%. By accounting for uncoupled and residual pump, the estimated slope efficiency with respect to absorbed power is 44%, exceeding the Stokes efficiency and indicating that the gallosilicate supports Tm\u2013Tm cross-relaxation. The work demonstrates that gallosilicate fibers have great potential for efficient, and possibly high-power, 2-\u00b5m class fiber lasers.\n                  <\/jats:p>","DOI":"10.1364\/ol.608616","type":"journal-article","created":{"date-parts":[[2026,7,27]],"date-time":"2026-07-27T14:00:10Z","timestamp":1785160810000},"page":"4669","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["8\u2009W thulium-doped gallosilicate fiber laser at 2\u2009\u00b5m"],"prefix":"10.1364","volume":"51","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3434-8059","authenticated-orcid":true,"given":"Brian","family":"Topper","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/037s24f05","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthew","family":"Walton","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/037s24f05","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lewis","family":"Kleman","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/037s24f05","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brandi","family":"Baldus","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/037s24f05","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kristin","family":"Chapman","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/037s24f05","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6954-6325","authenticated-orcid":true,"given":"Liang","family":"Dong","sequence":"additional","affiliation":[{"name":"Clemson University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7909-7869","authenticated-orcid":true,"given":"Thomas W.","family":"Hawkins","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/037s24f05","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5910-3504","authenticated-orcid":true,"given":"John","family":"Ballato","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/037s24f05","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Clemson University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,8,12]]},"reference":[{"key":"ol-51-16-4669-R1","doi-asserted-by":"publisher","first-page":"113","DOI":"10.1016\/0022-3093(95)00542-2","type":"journal-article","volume":"195","author":"Zou","year":"1996","journal-title":"J. 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All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.","name":"copyright","label":"Copyright"}]}}