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Express"],"published-print":{"date-parts":[[2025,9,22]]},"abstract":"<jats:p>\n                    A long-period fiber grating (LPFG) sensor coated with zinc oxide (ZnO) film is proposed for the detection of hydrogen sulfide (H\n                    <jats:sub>2<\/jats:sub>\n                    S), which is based on the combined high-response characteristics of asymmetric cladding modes and the sensitive film. The asymmetric cladding modes are excited by fabricating the grating in an asymmetric dual-core fiber (ADCF). By simulating the sensitivity of the ADCF-LPFG sensor with different thicknesses in the mode transition region, the optimal film thickness is determined to be 120 nm. Experimentally, the sensor achieves a maximum H\n                    <jats:sub>2<\/jats:sub>\n                    S concentration sensitivity of 63.21 pm\/ppm in the range of 4.93-41.6 ppm. It also exhibits excellent stability of 0.0011% and a detection limit of 2.432 ppm. Additionally, the sensor demonstrates a temperature sensitivity of -83.17 pm\/\u00b0C over the range of 10-40\u00b0C. The designed sensor features high sensitivity and compact structure, demonstrating significant potential for simultaneous detection of H\n                    <jats:sub>2<\/jats:sub>\n                    S concentration and temperature.\n                  <\/jats:p>","DOI":"10.1364\/oe.572641","type":"journal-article","created":{"date-parts":[[2025,9,4]],"date-time":"2025-09-04T15:00:11Z","timestamp":1756998011000},"page":"40304","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["High-sensitivity H\n                    <sub>2<\/sub>\n                    S gas sensor based on asymmetric modes in long-period fiber grating"],"prefix":"10.1364","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4381-6291","authenticated-orcid":true,"given":"Yi","family":"Huang","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/006teas31","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yingying","family":"He","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/006teas31","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chuanlu","family":"Deng","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/006teas31","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Feng","family":"Zhu","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/006teas31","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiafan","family":"Liao","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/006teas31","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yunxiang","family":"Wang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/006teas31","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chengyong","family":"Hu","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/006teas31","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanhua","family":"Dong","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/006teas31","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qi","family":"Zhang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/006teas31","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9228-8720","authenticated-orcid":true,"given":"Xiaobei","family":"Zhang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/006teas31","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tingyun","family":"Wang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/006teas31","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2025,9,15]]},"reference":[{"key":"oe-33-19-40304-R1","doi-asserted-by":"publisher","first-page":"406","DOI":"10.1139\/cjc-2015-0425","volume":"94","author":"Marriott","year":"2016","journal-title":"Can. 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