{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T20:47:08Z","timestamp":1792788428504,"version":"4.5.0"},"reference-count":30,"publisher":"Optica Publishing Group","issue":"20","license":[{"start":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T00:00:00Z","timestamp":1790553600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR-OA"},{"start":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T00:00:00Z","timestamp":1790553600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"name":"Natural Science Foundation of Hangzhou","award":["2025SZRJJ1384"],"award-info":[{"award-number":["2025SZRJJ1384"]}]},{"name":"Central Government Funds for Guiding Local Science and Technology Development","award":["2026ZY01054"],"award-info":[{"award-number":["2026ZY01054"]}]},{"name":"Funds of Hangzhou Leading Innovation and Entrepreneurship Teams","award":["TD2025003"],"award-info":[{"award-number":["TD2025003"]}]},{"name":"Hangzhou Joint Fund of the Zhejiang Provincial Natural Science Foundation of China","award":["LHZY24F030002"],"award-info":[{"award-number":["LHZY24F030002"]}],"id":[{"id":"https:\/\/ror.org\/04aqat463","id-type":"ROR","asserted-by":"crossref"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Opt. Express"],"published-print":{"date-parts":[[2026,10,5]]},"abstract":"<jats:p>\n                    Broadband-source-driven resonant fiber-optic gyroscopes provide a promising route to suppress coherence-related parasitic effects while retaining a resonator-based differential-frequency discriminator. However, existing interrogation schemes still rely heavily on phase-modulator-based frequency shifting, which can introduce reset transients, half-wave-voltage drift, residual intensity modulation and harmonic distortion. Here, we demonstrate a broadband resonant optical gyroscope based on dual acousto-optic frequency modulation and closed-loop resonance interrogation. A broadband ASE source interrogates a fiber ring resonator, while two acousto-optic modulators independently control the counter-propagating optical frequencies. One AOM applies dual-frequency frequency-shift modulation to sample the resonator response on both sides of the resonance, converting the symmetric resonance envelope into an antisymmetric error signal. The second AOM applies an RF-defined feedback frequency that compensates the Sagnac-induced frequency detuning, allowing the angular rate to be recovered directly from the closed-loop feedback signal. With a 500 m fiber ring resonator, a 70 mm mean diameter and a 30 nm-bandwidth ASE source centered near 1550 nm, the system shows stable closed-loop operation under zero-rate conditions. A 5 h continuous data segment selected from a continuous acquisition gives an angle-random-walk estimate of 0.00163\n                    <jats:sup>\u2218<\/jats:sup>\n                    \/h from the one-second Allan-deviation level and a minimum Allan deviation of 0.00172\n                    <jats:sup>\u2218<\/jats:sup>\n                    \/h. The results establish dual-AOM frequency control as a flexible interrogation strategy for broadband resonant optical gyroscopes and provide a practical route to reducing phase-modulator-induced errors in low-coherence resonant inertial sensing.\n                  <\/jats:p>","DOI":"10.1364\/oe.610900","type":"journal-article","created":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T18:47:58Z","timestamp":1790621278000},"page":"37803","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Broadband resonant optical gyroscope using dual acousto-optic frequency modulation and closed-loop interrogation"],"prefix":"10.1364","volume":"34","author":[{"given":"Fan","family":"Wu","sequence":"first","affiliation":[{"name":"Northwestern Polytechnical University"},{"name":"Flight Automatic Control Research Institute"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun","family":"Li","sequence":"additional","affiliation":[{"name":"Flight Automatic Control Research Institute"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3482-9592","authenticated-orcid":true,"given":"Yang","family":"Du","sequence":"additional","affiliation":[{"name":"University of Chinese Academy of Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,9,28]]},"reference":[{"key":"oe-34-20-37803-R1","doi-asserted-by":"publisher","first-page":"2284","DOI":"10.3390\/s17102284","type":"journal-article","volume":"17","author":"Passaro","year":"2017","journal-title":"Sensors"},{"key":"oe-34-20-37803-R2","first-page":"65","article-title":"Fiber Optic Gyro Development at Honeywell","author":"UddUdd","year":"2019"},{"key":"oe-34-20-37803-R3","doi-asserted-by":"publisher","first-page":"031302","DOI":"10.3788\/COL202422.031302","type":"journal-article","volume":"22","author":"Guo","year":"2024","journal-title":"Chin. Opt. Lett."},{"key":"oe-34-20-37803-R4","doi-asserted-by":"publisher","first-page":"4023","DOI":"10.1109\/JLT.2023.3260839","type":"journal-article","volume":"41","author":"Song","year":"2023","journal-title":"J. Lightwave Technol."},{"key":"oe-34-20-37803-R5","doi-asserted-by":"publisher","first-page":"14121","DOI":"10.1364\/OE.27.014121","type":"journal-article","volume":"27","author":"Li","year":"2019","journal-title":"Opt. Express"},{"key":"oe-34-20-37803-R6","doi-asserted-by":"publisher","first-page":"3546","DOI":"10.1109\/JLT.2016.2587667","type":"journal-article","volume":"35","author":"Ma","year":"2017","journal-title":"J. Lightwave Technol."},{"key":"oe-34-20-37803-R7","doi-asserted-by":"publisher","first-page":"15088","DOI":"10.1364\/OE.23.015088","type":"journal-article","volume":"23","author":"Ma","year":"2015","journal-title":"Opt. 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Commun."},{"key":"oe-34-20-37803-R16","doi-asserted-by":"publisher","first-page":"542","DOI":"10.1364\/PRJ.443496","type":"journal-article","volume":"10","author":"Zhao","year":"2022","journal-title":"Photonics Res."},{"key":"oe-34-20-37803-R17","doi-asserted-by":"publisher","first-page":"1137","DOI":"10.1364\/OL.451372","type":"journal-article","volume":"47","author":"Zhao","year":"2022","journal-title":"Opt. Lett."},{"key":"oe-34-20-37803-R18","doi-asserted-by":"publisher","first-page":"4971","DOI":"10.1364\/AO.460419","type":"journal-article","volume":"61","author":"Liu","year":"2022","journal-title":"Appl. Opt."},{"key":"oe-34-20-37803-R19","doi-asserted-by":"publisher","first-page":"5100","DOI":"10.1364\/OL.470933","type":"journal-article","volume":"47","author":"Liu","year":"2022","journal-title":"Opt. 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Lightwave Technol."},{"key":"oe-34-20-37803-R24","doi-asserted-by":"publisher","first-page":"4840","DOI":"10.1364\/AO.525243","type":"journal-article","volume":"63","author":"Xu","year":"2024","journal-title":"Appl. Opt."},{"key":"oe-34-20-37803-R25","doi-asserted-by":"publisher","first-page":"8589","DOI":"10.1364\/AO.539581","type":"journal-article","volume":"63","author":"Hu","year":"2024","journal-title":"Appl. Opt."},{"key":"oe-34-20-37803-R27","doi-asserted-by":"publisher","first-page":"504","DOI":"10.1016\/j.optcom.2017.10.037","type":"journal-article","volume":"410","author":"Zheng","year":"2018","journal-title":"Opt. Commun."},{"key":"oe-34-20-37803-R28","doi-asserted-by":"publisher","first-page":"131588","DOI":"10.1016\/j.optcom.2025.131588","type":"journal-article","volume":"580","author":"Xu","year":"2025","journal-title":"Opt. 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