{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T17:49:08Z","timestamp":1791481748641,"version":"4.3.4"},"reference-count":26,"publisher":"Optica Publishing Group","issue":"20","license":[{"start":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T00:00:00Z","timestamp":1791417600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR"},{"start":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T00:00:00Z","timestamp":1791417600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"name":"National Natural Science Foundation of China","award":["62475189"],"award-info":[{"award-number":["62475189"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]},{"name":"National Natural Science Foundation of China","award":["62375076"],"award-info":[{"award-number":["62375076"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Opt. Lett."],"published-print":{"date-parts":[[2026,10,15]]},"abstract":"<jats:p>\n                    We demonstrate watt-level single-longitudinal-mode (SLM) high-order Hermite\u2013Gaussian (HG) mode lasing from an off-axis-pumped Nd:YVO\n                    <jats:sub>4<\/jats:sub>\n                    laser with a unidirectional ring cavity. This configuration combines simple pump-position-controlled transverse-mode selection with a mature and efficient architecture for SLM operation, offering a practical route toward power-scalable SLM structured-light lasers. The intrinsic astigmatism of the ring cavity further constrains the eigenmodes, supporting high-purity HG lasing and independent tuning of the two mode indices through the pump position. At an incident pump power of 3.18\u2009W, the maximum output power of the high-order modes reaches 1.14\u2009W, with slope efficiencies above 30%. SLM Laguerre\u2013Gaussian beams are also obtained through astigmatic mode conversion. The influence of output coupling on laser efficiency and mode purity is investigated, revealing their trade-off and providing a reference for further power scaling.\n                  <\/jats:p>","DOI":"10.1364\/ol.614999","type":"journal-article","created":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T13:42:10Z","timestamp":1791466930000},"page":"5774","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Watt-level single-longitudinal-mode Hermite\u2013Gaussian lasing in a unidirectional ring cavity"],"prefix":"10.1364","volume":"51","author":[{"given":"Dechen","family":"Zhan","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/012tb2g32","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Tianjin University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1850-6643","authenticated-orcid":true,"given":"Quan","family":"Sheng","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/012tb2g32","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Tianjin University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mingcheng","family":"Tian","sequence":"additional","affiliation":[{"name":"Tianjin University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianing","family":"Li","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/012tb2g32","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Tianjin University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pengbo","family":"Jiang","sequence":"additional","affiliation":[{"name":"Qilu University of Technology (Shandong Academy of Sciences)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhenxu","family":"Bai","sequence":"additional","affiliation":[{"name":"Hebei University of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7923-4349","authenticated-orcid":true,"given":"Shijie","family":"Fu","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/012tb2g32","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Tianjin University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Shi","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/012tb2g32","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Tianjin University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3105-4370","authenticated-orcid":true,"given":"Jianquan","family":"Yao","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/012tb2g32","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Tianjin University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,10,8]]},"reference":[{"key":"ol-51-20-5774-R1","doi-asserted-by":"publisher","first-page":"253","DOI":"10.1038\/s41566-021-00780-4","type":"journal-article","volume":"15","author":"Forbes","year":"2021","journal-title":"Nat. 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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"}]}}