{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T07:32:47Z","timestamp":1772263967319,"version":"3.50.1"},"reference-count":21,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2018,1,26]],"date-time":"2018-01-26T00:00:00Z","timestamp":1516924800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this paper, a hybrid sensor was fabricated using a IR-femtosecond laser to measure the thermal expansion and thermo-optical coefficient of silica-based fiber Bragg gratings (FBGs). The hybrid sensor was composed of an inline fiber Fabry-Perot interferometer (FFPI) cavity and a type-II FBG. Experiment results showed that the type-II FBG had three high reflectivity resonances in the wavelength ranging from 1100 to 1600 nm, showing the peaks in 1.1, 1.3 and 1.5 \u03bcm, respectively. The thermal expansion and thermo-optical coefficient (1.3 \u03bcm, 1.5 \u03bcm) of silica-based FBG, under temperatures ranging from 30 to 1100 \u00b0C, had been simultaneously calculated by measuring the wavelength of the type-II FBG and FFPI cavity length.<\/jats:p>","DOI":"10.3390\/s18020359","type":"journal-article","created":{"date-parts":[[2018,1,26]],"date-time":"2018-01-26T07:31:51Z","timestamp":1516951911000},"page":"359","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["A IR-Femtosecond Laser Hybrid Sensor to Measure the Thermal Expansion and Thermo-Optical Coefficient of Silica-Based FBG at High Temperatures"],"prefix":"10.3390","volume":"18","author":[{"given":"Litong","family":"Li","sequence":"first","affiliation":[{"name":"State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fibre and Cable Joint Stock Limited Company, Wuhan 430073, China"}]},{"given":"Dajuan","family":"Lv","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fibre and Cable Joint Stock Limited Company, Wuhan 430073, China"},{"name":"National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China"}]},{"given":"Minghong","family":"Yang","sequence":"additional","affiliation":[{"name":"National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China"}]},{"given":"Liangming","family":"Xiong","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fibre and Cable Joint Stock Limited Company, Wuhan 430073, China"}]},{"given":"Jie","family":"Luo","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fibre and Cable Joint Stock Limited Company, Wuhan 430073, China"}]}],"member":"1968","published-online":{"date-parts":[[2018,1,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"17936","DOI":"10.1364\/OE.25.017936","article-title":"FBGs written in specialty fiber for high pressure\/high temperature measurement","volume":"25","author":"Huang","year":"2017","journal-title":"Opt. 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Express"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"4048","DOI":"10.1364\/OL.41.004048","article-title":"Behavior of femtosecond laser-induced eccentric fiber bragg gratings at very high temperatures","volume":"41","author":"Chah","year":"2016","journal-title":"Opt. Lett."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"4591","DOI":"10.1364\/OE.21.004591","article-title":"Inscription of first-order sapphire bragg gratings using 400 nm femtosecond laser radiation","volume":"21","author":"Elsmann","year":"2013","journal-title":"Opt. Express"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"335","DOI":"10.1364\/OL.38.000335","article-title":"Single microchannel high-temperature fiber sensor by femtosecond laser-induced water breakdown","volume":"38","author":"Qu","year":"2013","journal-title":"Opt. Lett."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1109\/JPHOT.2016.2555580","article-title":"High-temperature strain sensing using sapphire fibers with inscribed first-order bragg gratings","volume":"8","author":"Habisreuther","year":"2016","journal-title":"IEEE Photonics J."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"247","DOI":"10.1364\/OL.38.000247","article-title":"Temperature and strain characterization of regenerated gratings","volume":"38","author":"Wang","year":"2013","journal-title":"Opt. Lett."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"860","DOI":"10.1016\/j.applthermaleng.2015.08.096","article-title":"Sapphire fiber bragg gratings for high temperature and dynamic temperature diagnostics","volume":"91","author":"Habisreuther","year":"2015","journal-title":"Appl. Therm. Eng."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"3714","DOI":"10.1364\/OE.24.003714","article-title":"Temperature sensing up to 1300 \u00b0C using suspended-core microstructured optical fibers","volume":"24","author":"Warrensmith","year":"2016","journal-title":"Opt. Express"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1016\/j.polymertesting.2016.03.001","article-title":"Optical sensor-based measurements of thermal expansion coefficient in additive manufacturing","volume":"51","author":"Economidou","year":"2016","journal-title":"Polym. Test."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"313","DOI":"10.1364\/OE.25.000313","article-title":"Simultaneous measurement of thermo-optic and thermal expansion coefficients with a single arm double interferometer","volume":"25","author":"Domenegueti","year":"2017","journal-title":"Opt. Express"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"075102","DOI":"10.1088\/0957-0233\/27\/7\/075102","article-title":"Measurement of thermal expansion coefficient of graphene diaphragm using optical fiber Fabry-Perot interference","volume":"27","author":"Li","year":"2016","journal-title":"Meas. Sci. Technol."},{"key":"ref_15","first-page":"21","article-title":"FFPI-FBG hybrid sensor to measure the thermal expansion and thermo-optical coefficient of a silica-based fiber at cryogenic temperatures","volume":"13","author":"Li","year":"2015","journal-title":"Chin. Opt. Lett."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1223","DOI":"10.1109\/JSEN.2008.926186","article-title":"Multiparameter sensor based on single high-order fiber bragg grating made with IR-Femtosecond radiation in single-mode fibers","volume":"8","author":"Dan","year":"2008","journal-title":"IEEE Sens. J."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1612","DOI":"10.1016\/j.optcom.2010.11.010","article-title":"Integration of miniature Fabry\u2013Perot fiber optic sensor with FBG for the measurement of temperature and strain","volume":"284","author":"Li","year":"2011","journal-title":"Opt. Commun."},{"key":"ref_18","first-page":"U1300","article-title":"Material composition and structure design in PCVD silica-based single-mode fiber","volume":"6352","author":"Han","year":"2006","journal-title":"Proc. SPIE Int. Soc. Opt. Eng."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"16750","DOI":"10.1364\/OE.23.016750","article-title":"Fiber-optic refractometer based on a phase-shifted fiber bragg grating on a side-hole fiber","volume":"23","author":"Zhang","year":"2015","journal-title":"Opt. Express"},{"key":"ref_20","first-page":"525","article-title":"Thermo-optic coefficient and temperature sensitivity of long-period fiber gratings","volume":"30","author":"Zhang","year":"2004","journal-title":"Opt. Tech."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1141","DOI":"10.1364\/OL.25.001141","article-title":"Fiber bragg grating sensor for simultaneous measurement of displacement and temperature","volume":"25","author":"Yu","year":"2000","journal-title":"Opt. 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