{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T14:40:04Z","timestamp":1756305604330,"version":"3.44.0"},"reference-count":20,"publisher":"Optica Publishing Group","issue":"17","license":[{"start":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T00:00:00Z","timestamp":1756252800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR"},{"start":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T00:00:00Z","timestamp":1756252800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"name":"Key Research and Development Program of Shandong Province, China","award":["2023ZLYS03","2024CXPT098"],"award-info":[{"award-number":["2023ZLYS03","2024CXPT098"]}]},{"DOI":"10.13039\/501100012166","name":"National Key Research and Development Program of China","doi-asserted-by":"publisher","award":["2023YFB3609800","2021YFA1400604"],"award-info":[{"award-number":["2023YFB3609800","2021YFA1400604"]}],"id":[{"id":"10.13039\/501100012166","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Opt. Lett."],"published-print":{"date-parts":[[2025,9,1]]},"abstract":"<jats:p>PT-symmetric semiconductor laser bars are fabricated and experimentally harnessed via spectral beam combining. A 22.20% reduction in the PT-symmetry-breaking threshold current is observed, compared to that of free-running operation, which is justified by the numerical analysis, based on a three-mirror equivalent model and the gain-clamping effect. At 26\u2009A, the measured <jats:italic toggle=\"yes\">M<\/jats:italic><jats:sup>2<\/jats:sup> values of spectral beam combining are 1.83 and 1.86 for the slow and the fast axes, respectively. Calculated peak brightness reaches 411\u2009MW\u00b7cm<jats:sup>\u22122<\/jats:sup>\u00b7sr<jats:sup>\u22121<\/jats:sup> with 13.16\u2009W output power. This work achieves flexible exceptional-point control via external cavity feedback, with brightness enhanced.<\/jats:p>","DOI":"10.1364\/ol.571774","type":"journal-article","created":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T15:59:44Z","timestamp":1753891184000},"page":"5454","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["High-brightness PT-symmetric laser bars with exceptional point modulation via spectral beam combining"],"prefix":"10.1364","volume":"50","author":[{"given":"Zijie","family":"Gao","sequence":"first","affiliation":[{"name":"Institute of Semiconductors"},{"name":"University of Chinese Academy of Sciences"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weiqiao","family":"Zhang","sequence":"additional","affiliation":[{"name":"Weifang Academy of Advanced Opto-Electronic Circuits"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ting","family":"Fu","sequence":"additional","affiliation":[{"name":"Weifang Academy of Advanced Opto-Electronic Circuits"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lingqian","family":"Meng","sequence":"additional","affiliation":[{"name":"Institute of Semiconductors"},{"name":"University of Chinese Academy of Sciences"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jialong","family":"Mu","sequence":"additional","affiliation":[{"name":"Institute of Semiconductors"},{"name":"University of Chinese Academy of Sciences"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fengxin","family":"Dong","sequence":"additional","affiliation":[{"name":"Weifang Academy of Advanced Opto-Electronic Circuits"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xuyan","family":"Zhou","sequence":"additional","affiliation":[{"name":"Institute of Semiconductors"},{"name":"Weifang Academy of Advanced Opto-Electronic Circuits"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9158-6681","authenticated-orcid":true,"given":"Wanhua","family":"Zheng","sequence":"additional","affiliation":[{"name":"Institute of Semiconductors"},{"name":"University of Chinese Academy of Sciences"},{"name":"Weifang Academy of Advanced Opto-Electronic Circuits"},{"name":"Institute of Semiconductors, CAS"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"285","published-online":{"date-parts":[[2025,8,27]]},"reference":[{"key":"ol-50-17-5454-R1","doi-asserted-by":"publisher","first-page":"5243","DOI":"10.1103\/PhysRevLett.80.5243","volume":"80","author":"Bender","year":"1998","journal-title":"Phys. Rev. Lett."},{"key":"ol-50-17-5454-R2","doi-asserted-by":"publisher","first-page":"206805","DOI":"10.1103\/PhysRevLett.103.206805","volume":"103","author":"Guo","year":"2009","journal-title":"Phys. Rev. Lett."},{"key":"ol-50-17-5454-R3","doi-asserted-by":"publisher","first-page":"192","DOI":"10.1038\/nphys1515","volume":"6","author":"R\u00fcter","year":"2010","journal-title":"Nat. Phys."},{"key":"ol-50-17-5454-R4","doi-asserted-by":"publisher","first-page":"167","DOI":"10.1038\/nature11298","volume":"488","author":"Regensburger","year":"2012","journal-title":"Nature"},{"key":"ol-50-17-5454-R5","doi-asserted-by":"publisher","first-page":"752","DOI":"10.1038\/s41566-017-0031-1","volume":"11","author":"Feng","year":"2017","journal-title":"Nat. Photonics"},{"key":"ol-50-17-5454-R6","doi-asserted-by":"publisher","first-page":"20440","DOI":"10.1364\/OE.423266","volume":"29","author":"Fu","year":"2021","journal-title":"Opt. Express"},{"key":"ol-50-17-5454-R7","doi-asserted-by":"publisher","first-page":"149","DOI":"10.1038\/s41377-023-01175-6","volume":"12","author":"Seker","year":"2023","journal-title":"Light Sci. Appl."},{"key":"ol-50-17-5454-R8","doi-asserted-by":"publisher","first-page":"47647","DOI":"10.1364\/OE.546242","volume":"32","author":"Zhang","year":"2024","journal-title":"Opt. Express"},{"key":"ol-50-17-5454-R9","doi-asserted-by":"publisher","first-page":"405","DOI":"10.1364\/ol.25.000405","volume":"25","author":"Daneu","year":"2000","journal-title":"Opt. Lett."},{"key":"ol-50-17-5454-R10","doi-asserted-by":"publisher","first-page":"225","DOI":"10.1007\/s00340-006-2159-4","volume":"83","author":"Jensen","year":"2006","journal-title":"Appl. Phys. B"},{"key":"ol-50-17-5454-R11","doi-asserted-by":"publisher","first-page":"5684","DOI":"10.1364\/oe.17.005684","volume":"17","author":"Vijayakumar","year":"2009","journal-title":"Opt. Express"},{"key":"ol-50-17-5454-R12","doi-asserted-by":"publisher","first-page":"3627","DOI":"10.1364\/OE.21.003627","volume":"21","author":"Zhang","year":"2013","journal-title":"Opt. Express"},{"key":"ol-50-17-5454-R13","doi-asserted-by":"publisher","first-page":"17804","DOI":"10.1364\/OE.22.017804","volume":"22","author":"Zhu","year":"2014","journal-title":"Opt. Express"},{"key":"ol-50-17-5454-R14","doi-asserted-by":"publisher","first-page":"045811","DOI":"10.1088\/1612-202X\/aa5f99","volume":"14","author":"Meng","year":"2017","journal-title":"Laser Phys. Lett."},{"key":"ol-50-17-5454-R15","doi-asserted-by":"publisher","first-page":"3518","DOI":"10.1364\/OE.26.003518","volume":"26","author":"Zhao","year":"2018","journal-title":"Opt. Express"},{"key":"ol-50-17-5454-R16","doi-asserted-by":"publisher","first-page":"764","DOI":"10.1364\/OL.37.000764","volume":"37","author":"Miri","year":"2012","journal-title":"Opt. Lett."},{"key":"ol-50-17-5454-R17","doi-asserted-by":"publisher","first-page":"8304","DOI":"10.1038\/s41467-023-43874-z","volume":"14","author":"Ji","year":"2023","journal-title":"Nat. Commun."},{"key":"ol-50-17-5454-R18","doi-asserted-by":"publisher","first-page":"2539","DOI":"10.1364\/PRJ.529008","volume":"12","author":"Chen","year":"2024","journal-title":"Photonics Res."},{"key":"ol-50-17-5454-R19","doi-asserted-by":"publisher","first-page":"1080","DOI":"10.1364\/OL.483315","volume":"48","author":"Zhang","year":"2023","journal-title":"Opt. Lett."},{"year":"2012","author":"Coldren","key":"ol-50-17-5454-R20"}],"container-title":["Optics Letters"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/opg.optica.org\/viewmedia.cfm?URI=ol-50-17-5454&seq=0","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T14:27:12Z","timestamp":1756304832000},"score":1,"resource":{"primary":{"URL":"https:\/\/opg.optica.org\/abstract.cfm?URI=ol-50-17-5454"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,8,27]]},"references-count":20,"journal-issue":{"issue":"17","published-online":{"date-parts":[[2025]]},"published-print":{"date-parts":[[2025]]}},"URL":"https:\/\/doi.org\/10.1364\/ol.571774","relation":{},"ISSN":["0146-9592","1539-4794"],"issn-type":[{"type":"print","value":"0146-9592"},{"type":"electronic","value":"1539-4794"}],"subject":[],"published":{"date-parts":[[2025,8,27]]},"assertion":[{"value":"Optica Publishing Group","name":"publisher","label":"This article is maintained by"},{"value":"https:\/\/doi.org\/10.1364\/OL.571774","name":"articlelink","label":"Crossref DOI link to publisher maintained version"},{"value":"letter","name":"content_type","label":"Article type"},{"value":"Screened by Similarity Check","name":"cross_check","label":"Similarity check"},{"value":"Yes","order":0,"name":"peer_reviewed","label":"Peer reviewed","group":{"name":"peer_review","label":"Peer review"}},{"value":"Single blind","order":1,"name":"review_process","label":"Review process","group":{"name":"peer_review","label":"Peer review"}},{"value":"25 June 2025","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"30 July 2025","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"27 August 2025","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}},{"value":"\u00a9 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.","name":"copyright","label":"Copyright"}]}}