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Express"],"published-print":{"date-parts":[[2023,2,13]]},"abstract":"<jats:p>\n                    A sulfur dioxide (SO\n                    <jats:sub>2<\/jats:sub>\n                    ) gas sensor based on the photoacoustic spectroscopy technology in a sulfur hexafluoride (SF\n                    <jats:sub>6<\/jats:sub>\n                    ) gas matrix was demonstrated for SF\n                    <jats:sub>6<\/jats:sub>\n                    decomposition components monitoring in the power system. A passive\n                    <jats:italic toggle=\"yes\">Q<\/jats:italic>\n                    -switching laser diode (LD) pumped all-solid-state 266\u2005nm deep-ultraviolet laser was exploited as the laser excitation source. The photoacoustic signal amplitude is linear related to the incident optical power, whereas, a random laser power jitter is inevitable since the immature laser manufacturing technology in UV spectral region. A compact laser power stabilization system was developed for better sensor performance by adopting a photodetector, a custom-made internal closed-loop feedback controller and a Bragg acousto-optic modulator (AOM). The out-power stability of 0.04% was achieved even though the original power stability was 0.41% for \u223c 2 hours. A differential two-resonator photoacoustic cell (PAC) was designed for weak photoacoustic signal detection. The special physical constants of SF\n                    <jats:sub>6<\/jats:sub>\n                    buffer gas induced a high-\n                    <jats:italic toggle=\"yes\">Q<\/jats:italic>\n                    factor of 85. A detection limit of 140 ppbv was obtained after the optimization, which corresponds to a normalized noise equivalent absorption coefficient of 3.2 \u00d7 10\n                    <jats:sup>\u22129\u2005<\/jats:sup>\n                    cm\n                    <jats:sup>-1<\/jats:sup>\n                    WHz\n                    <jats:sup>-1\/2<\/jats:sup>\n                    .\n                  <\/jats:p>","DOI":"10.1364\/oe.483240","type":"journal-article","created":{"date-parts":[[2023,1,26]],"date-time":"2023-01-26T17:00:05Z","timestamp":1674752405000},"page":"6974","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":51,"title":["Trace photoacoustic SO\n                    <sub>2<\/sub>\n                    gas sensor in SF\n                    <sub>6<\/sub>\n                    utilizing a 266\u2005nm UV laser and an acousto-optic power stabilizer"],"prefix":"10.1364","volume":"31","author":[{"given":"Baisong","family":"Chen","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05s92vm98","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haokun","family":"Li","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05s92vm98","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoming","family":"Zhao","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05s92vm98","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Miao","family":"Gao","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05s92vm98","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kun","family":"Cheng","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05s92vm98","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaopeng","family":"Shao","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05s92vm98","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongpeng","family":"Wu","sequence":"additional","affiliation":[{"name":"Shanxi University"},{"name":"Jilin University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7379-3388","authenticated-orcid":true,"given":"Lei","family":"Dong","sequence":"additional","affiliation":[{"name":"Shanxi University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4840-9529","authenticated-orcid":true,"given":"Xukun","family":"Yin","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05s92vm98","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Changchun Institute of Optics"},{"name":"Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2023,2,10]]},"reference":[{"key":"oe-31-4-6974-R1","doi-asserted-by":"publisher","first-page":"693","DOI":"10.1109\/TEI.1986.348921","volume":"EI21","author":"Chu","year":"1986","journal-title":"IEEE Trans. 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