{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T03:41:11Z","timestamp":1760240471764,"version":"build-2065373602"},"reference-count":16,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2019,6,27]],"date-time":"2019-06-27T00:00:00Z","timestamp":1561593600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Key R&amp;D Program of China","award":["2017YFF0204901"],"award-info":[{"award-number":["2017YFF0204901"]}]},{"name":"Zhejiang Natural Science Foundation Project","award":["Y19F050039"],"award-info":[{"award-number":["Y19F050039"]}]},{"name":"Aerospace Science and Technology Fund","award":["1809KM20190019"],"award-info":[{"award-number":["1809KM20190019"]}]},{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","award":["2019FZA5001"],"award-info":[{"award-number":["2019FZA5001"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The multifunction integrated optical chip (MIOC) is one of the most critical parts of the interferometric fiber optic gyroscope (IFOG), and research on the halfwave voltage of the MIOC is meaningful for a high-precision IFOG. In this paper, the correlation between the frequency and halfwave voltage, which affects the interference light intensity of IFOG, is presented theoretically. A widespread measurement method for frequency dependence of the halfwave voltage, based on lock-in amplification and sinusoidal modulation, is proposed. Further, the measurement result and the oscillation of interference light intensity in the Sagnac interferometer are presented, which are in great agreement with the theory. This paper proposes the frequency dependence of the halfwave voltage and provides a new error research direction for the improvement of the MIOC in a high-precision IFOG.<\/jats:p>","DOI":"10.3390\/s19132851","type":"journal-article","created":{"date-parts":[[2019,6,27]],"date-time":"2019-06-27T08:47:13Z","timestamp":1561625233000},"page":"2851","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Research on the Frequency-Dependent Halfwave Voltage of a Multifunction Integrated Optical Chip in an Interferometric Fiber Optic Gyroscope"],"prefix":"10.3390","volume":"19","author":[{"given":"Ran","family":"Bi","sequence":"first","affiliation":[{"name":"State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, No. 38 Zheda Road, Hangzhou 310027, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lijun","family":"Miao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, No. 38 Zheda Road, Hangzhou 310027, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tengchao","family":"Huang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, No. 38 Zheda Road, Hangzhou 310027, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guangyao","family":"Ying","sequence":"additional","affiliation":[{"name":"State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shuangliang","family":"Che","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, No. 38 Zheda Road, Hangzhou 310027, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaowu","family":"Shu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, No. 38 Zheda Road, Hangzhou 310027, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,6,27]]},"reference":[{"key":"ref_1","unstructured":"Lef\u00e8vre, H.C. 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