{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T19:56:58Z","timestamp":1790798218073,"version":"4.1.0"},"reference-count":11,"publisher":"Optica Publishing Group","issue":"19","license":[{"start":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T00:00:00Z","timestamp":1790726400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR"},{"start":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T00:00:00Z","timestamp":1790726400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"name":"National Natural Science Foundation of\n\t\t\t\t\t\tChina","award":["62575061"],"award-info":[{"award-number":["62575061"]}],"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":[[2026,10,1]]},"abstract":"<jats:p>A dual-input silicon-on-insulator (SOI) arrayed waveguide grating (AWG)\n\t\t\t\t\tfiber Bragg grating (FBG) interrogator, enabled by an on-chip\n\t\t\t\t\tMach\u2013Zehnder interferometer (MZI) switch, is proposed and\n\t\t\t\t\texperimentally demonstrated. The device integrates a polarization beam\n\t\t\t\t\tsplitter (PBS), a thermo-optic MZI, and an asymmetric dual-input AWG.\n\t\t\t\t\tThe MZI enables on-chip selection of two AWG input ports, generating\n\t\t\t\t\tcomplementary spectral responses without increasing the number of\n\t\t\t\t\toutput channels. Due to fabrication-induced non-idealities in SOI-AWG\n\t\t\t\t\tresponses, conventional fitting-based interrogation methods suffer\n\t\t\t\t\tfrom increased errors. A feature-engineered feedforward neural network\n\t\t\t\t\t(FNN) is developed by exploiting multichannel responses from the two\n\t\t\t\t\tinput states. Experimental results show that the proposed dual-input\n\t\t\t\t\tFNN achieves an interrogation root-mean-square error (RMSE) of\n\t\t\t\t\t2.33\u2009pm on an independent external test set, reducing the error\n\t\t\t\t\tfrom 8.06\u2009pm obtained by polynomial fitting. This work provides\n\t\t\t\t\ta compact and high-precision solution for on-chip FBG\n\t\t\t\t\tinterrogation.<\/jats:p>","DOI":"10.1364\/ol.612115","type":"journal-article","created":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T12:00:11Z","timestamp":1789387211000},"page":"5585","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["MZI-switched dual-input SOI-AWG interrogator for neural-network-assisted FBG interrogation"],"prefix":"10.1364","volume":"51","author":[{"given":"Qichao","family":"Wang","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/04ct4d772","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jingzhou","family":"Sun","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/04ct4d772","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zixiao","family":"Zhu","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/04ct4d772","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3991-8156","authenticated-orcid":true,"given":"Binfeng","family":"Yun","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/04ct4d772","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guohua","family":"Hu","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/04ct4d772","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yiping","family":"Cui","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/04ct4d772","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,9,30]]},"reference":[{"key":"ol-51-19-5585-R1","doi-asserted-by":"publisher","first-page":"32577","DOI":"10.1364\/OE.560007","type":"journal-article","volume":"33","author":"Sun","year":"2025","journal-title":"Opt.\n\t\t\t\t\tExpress"},{"key":"ol-51-19-5585-R2","doi-asserted-by":"publisher","first-page":"25135","DOI":"10.1364\/OE.524568","type":"journal-article","volume":"32","author":"Liu","year":"2024","journal-title":"Opt.\n\t\t\t\t\tExpress"},{"key":"ol-51-19-5585-R3","doi-asserted-by":"publisher","first-page":"045034","DOI":"10.1088\/2515-7647\/ae0d3a","type":"journal-article","volume":"7","author":"Nagar","year":"2025","journal-title":"J. Phys.\n\t\t\t\t\tPhotonics"},{"key":"ol-51-19-5585-R4","doi-asserted-by":"publisher","first-page":"15827","DOI":"10.1364\/OE.519761","type":"journal-article","volume":"32","author":"Li","year":"2024","journal-title":"Opt.\n\t\t\t\t\tExpress"},{"key":"ol-51-19-5585-R5","doi-asserted-by":"publisher","first-page":"684","DOI":"10.1364\/PRJ.387816","type":"journal-article","volume":"8","author":"Zhang","year":"2020","journal-title":"Photonics\n\t\t\t\t\tRes."},{"key":"ol-51-19-5585-R6","doi-asserted-by":"publisher","first-page":"2300617","DOI":"10.1002\/lpor.202300617","type":"journal-article","volume":"18","author":"Shen","year":"2024","journal-title":"Laser Photonics\n\t\t\t\t\tRev."},{"key":"ol-51-19-5585-R7","doi-asserted-by":"publisher","first-page":"197","DOI":"10.1364\/OL.543769","type":"journal-article","volume":"50","author":"Yue","year":"2025","journal-title":"Opt. 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Opt.\n\t\t\t\t\tLett."}],"container-title":["Optics Letters"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/opg.optica.org\/viewmedia.cfm?URI=ol-51-19-5585&seq=0","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T19:10:27Z","timestamp":1790795427000},"score":1,"resource":{"primary":{"URL":"https:\/\/opg.optica.org\/abstract.cfm?URI=ol-51-19-5585"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,9,30]]},"references-count":11,"journal-issue":{"issue":"19","published-online":{"date-parts":[[2026]]},"published-print":{"date-parts":[[2026]]}},"URL":"https:\/\/doi.org\/10.1364\/ol.612115","relation":{},"ISSN":["0146-9592","1539-4794"],"issn-type":[{"value":"0146-9592","type":"print"},{"value":"1539-4794","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,9,30]]},"assertion":[{"value":"Optica Publishing Group","name":"publisher","label":"This article is maintained by"},{"value":"https:\/\/doi.org\/10.1364\/OL.612115","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":"26 July 2026","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"10 September 2026","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"30 September 2026","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}},{"value":"\u00a9 2026 Optica Publishing Group. All rights,\n\t\t\t\t\tincluding for text and data mining (TDM), Artificial Intelligence (AI)\n\t\t\t\t\ttraining, and similar technologies, are\n\t\t\t\t\treserved.","name":"copyright","label":"Copyright"}]}}