{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T15:41:30Z","timestamp":1785426090456,"version":"3.56.0"},"reference-count":44,"publisher":"Optica Publishing Group","issue":"26","license":[{"start":{"date-parts":[[2025,12,24]],"date-time":"2025-12-24T00:00:00Z","timestamp":1766534400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,12,24]],"date-time":"2025-12-24T00:00:00Z","timestamp":1766534400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"DOI":"10.13039\/501100000266","name":"Engineering and Physical Sciences Research Council","doi-asserted-by":"publisher","award":["EP\/M013294\/1"],"award-info":[{"award-number":["EP\/M013294\/1"]}],"id":[{"id":"10.13039\/501100000266","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000266","name":"Engineering and Physical Sciences Research Council","doi-asserted-by":"publisher","award":["EP\/T001046\/1"],"award-info":[{"award-number":["EP\/T001046\/1"]}],"id":[{"id":"10.13039\/501100000266","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000266","name":"Engineering and Physical Sciences Research Council","doi-asserted-by":"publisher","award":["EP\/Z533178\/1"],"award-info":[{"award-number":["EP\/Z533178\/1"]}],"id":[{"id":"10.13039\/501100000266","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000266","name":"Engineering and Physical Sciences Research Council","doi-asserted-by":"publisher","award":["EP\/T517938\/1"],"award-info":[{"award-number":["EP\/T517938\/1"]}],"id":[{"id":"10.13039\/501100000266","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100006041","name":"Innovate UK","doi-asserted-by":"publisher","award":["10004810"],"award-info":[{"award-number":["10004810"]}],"id":[{"id":"10.13039\/501100006041","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Opt. Express"],"published-print":{"date-parts":[[2025,12,29]]},"abstract":"<jats:p>\n                    Single-frequency AlGaInP-based VECSELs are high-brightness, low-noise lasers with capacity for compact power scaling, making them excellent candidates for quantum technology applications based on cold strontium (Sr) atoms, which require high-power, low-noise light at 689\u00a0nm. We demonstrate lateral power-scaling of an AlGaInP-VECSEL, producing multimode output power of 2\u00a0W around 689\u00a0nm and 1\u00a0W single-frequency at the Sr\n                    <jats:sup>1<\/jats:sup>\n                    S\n                    <jats:sub>0<\/jats:sub>\n                    \u2192\n                    <jats:sup>3<\/jats:sup>\n                    P\n                    <jats:sub>1<\/jats:sub>\n                    cooling transition frequency (434.82\u00a0THz) using intracavity filtering. Relative to previous reports, this system offers an increase in multimode output power of &gt;350%. The thermal resistance of the system is estimated as 4.3(1)\u00a0K\/W, consistent with other AlGaInP-VECSEL reports. Single-frequency output power and wavelength stability are observed as 4.3% and 445\u00a0fm (280\u00a0MHz) rms over a 1-hour period, respectively. The single-frequency VECSEL was also locked to a Fabry-Perot reference cavity, demonstrating ultra-low relative intensity noise (RIN) of &lt;-152.9\u00a0dBc\/Hz for frequencies above 1\u00a0kHz. Further frequency noise measurements resulted in estimated free-running and locked linewidths of 71(1)\u00a0kHz (0.02\u00a0s) and 7.26(1)\u00a0kHz (20\u00a0s), respectively, demonstrating suitability for high-power quantum applications based on cold Sr.\n                  <\/jats:p>","DOI":"10.1364\/oe.583172","type":"journal-article","created":{"date-parts":[[2025,12,15]],"date-time":"2025-12-15T09:00:07Z","timestamp":1765789207000},"page":"55185","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["1-watt single-frequency 689\u00a0nm VECSEL for quantum technologies"],"prefix":"10.1364","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-6486-4635","authenticated-orcid":true,"given":"Charlotte A.","family":"Hodges","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/00n3w3b69","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6761-191X","authenticated-orcid":true,"given":"Paulo Hisao","family":"Moriya","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/00n3w3b69","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4066-7411","authenticated-orcid":true,"given":"Jennifer E.","family":"Hastie","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/00n3w3b69","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2025,12,24]]},"reference":[{"key":"oe-33-26-55185-R1","doi-asserted-by":"publisher","first-page":"865","DOI":"10.1007\/s11128-011-0293-3","type":"journal-article","volume":"10","author":"Daley","year":"2011","journal-title":"Quantum Inf. 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Rep."},{"key":"oe-33-26-55185-R6","doi-asserted-by":"publisher","first-page":"011","DOI":"10.1088\/1475-7516\/2020\/05\/011","type":"journal-article","volume":"2020","author":"Badurina","year":"2020","journal-title":"J. Cosmol. Astropart. Phys."},{"key":"oe-33-26-55185-R7","doi-asserted-by":"publisher","first-page":"1107","DOI":"10.1007\/s00340-014-5932-9","type":"journal-article","volume":"117","author":"Poli","year":"2014","journal-title":"Appl. Phys. B"},{"key":"oe-33-26-55185-R8","doi-asserted-by":"publisher","first-page":"024014","DOI":"10.1088\/2058-9565\/abd83e","type":"journal-article","volume":"6","author":"Tino","year":"2021","journal-title":"Quantum Sci. Technol."},{"key":"oe-33-26-55185-R9","doi-asserted-by":"publisher","first-page":"085005","DOI":"10.1088\/1361-6455\/ab707f","type":"journal-article","volume":"53","author":"Manai","year":"2020","journal-title":"J. Phys. 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Further distribution of this work must maintain attribution to the author(s) and the published article\u2019s title, journal citation, and DOI.","name":"copyright","label":"Copyright"}]}}