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When measuring sulfur dioxide concentrations, detection sensitivity and limit of detection (\n                    <jats:italic toggle=\"yes\">LoD<\/jats:italic>\n                    ) achieved 10-fold and two-fold improvements, respectively. This study provides a novel, to our knowledge, method for enhancing measurements based on DOAS.\n                  <\/jats:p>","DOI":"10.1364\/ao.589108","type":"journal-article","created":{"date-parts":[[2026,3,10]],"date-time":"2026-03-10T14:00:38Z","timestamp":1773151238000},"page":"3350","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Signal-enhanced DOAS based on the secondary diffraction spectrum and its application in sulfur dioxide measurement"],"prefix":"10.1364","volume":"65","author":[{"given":"Lin","family":"Wang","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02y0rxk19","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Feng","family":"Qin","sequence":"additional","affiliation":[{"name":"Harbin Institute of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhenzhen","family":"Song","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02y0rxk19","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bing","family":"Tu","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02y0rxk19","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8489-2736","authenticated-orcid":true,"given":"Min","family":"Lai","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02y0rxk19","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8467-5520","authenticated-orcid":true,"given":"Yungang","family":"Zhang","sequence":"additional","affiliation":[{"name":"Yanshan University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhiguo","family":"Zhang","sequence":"additional","affiliation":[{"name":"Harbin Institute of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,3,27]]},"reference":[{"key":"ao-65-10-3350-R1","doi-asserted-by":"publisher","first-page":"124625","DOI":"10.1016\/j.saa.2024.124625","type":"journal-article","volume":"321","author":"Zheng","year":"2024","journal-title":"Spectrochim. 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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"}]}}