{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,29]],"date-time":"2026-03-29T06:07:12Z","timestamp":1774764432156,"version":"3.50.1"},"reference-count":50,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2010,3,5]],"date-time":"2010-03-05T00:00:00Z","timestamp":1267747200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>An overview on high-resolution and fast interrogation of optical-fiber sensors relying on laser reflection spectroscopy is given. Fiber Bragg-gratings (FBGs) and FBG resonators built in fibers of different types are used for strain, temperature and acceleration measurements using heterodyne-detection and optical frequency-locking techniques. Silica fiber-ring cavities are used for chemical sensing based on evanescent-wave spectroscopy. Various arrangements for signal recovery and noise reduction, as an extension of most typical spectroscopic techniques, are illustrated and results on detection performances are presented.<\/jats:p>","DOI":"10.3390\/s100301823","type":"journal-article","created":{"date-parts":[[2010,3,8]],"date-time":"2010-03-08T11:22:08Z","timestamp":1268047328000},"page":"1823-1845","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":42,"title":["Optical Fiber Sensing Based on Reflection Laser Spectroscopy"],"prefix":"10.3390","volume":"10","author":[{"given":"Gianluca","family":"Gagliardi","sequence":"first","affiliation":[{"name":"Consiglio Nazionale delle Ricerche, Istituto Nazionale di Ottica (INO), Via Campi Flegrei, 34 I-80078 Napoli, Italy"}]},{"given":"Mario","family":"Salza","sequence":"additional","affiliation":[{"name":"Consiglio Nazionale delle Ricerche, Istituto Nazionale di Ottica (INO), Via Campi Flegrei, 34 I-80078 Napoli, Italy"}]},{"given":"Pietro","family":"Ferraro","sequence":"additional","affiliation":[{"name":"Consiglio Nazionale delle Ricerche, Istituto Nazionale di Ottica (INO), Via Campi Flegrei, 34 I-80078 Napoli, Italy"}]},{"given":"Edmond","family":"Chehura","sequence":"additional","affiliation":[{"name":"Engineering Photonics Group, School of Engineering, Cranfield University, Bedford MK43 OAL, UK"}]},{"given":"Ralph P.","family":"Tatam","sequence":"additional","affiliation":[{"name":"Engineering Photonics Group, School of Engineering, Cranfield University, Bedford MK43 OAL, UK"}]},{"given":"Tarun K.","family":"Gangopadhyay","sequence":"additional","affiliation":[{"name":"Central Glass & Ceramic Research Institute (CSIR), 196, Raja S.C.Mullick Road, Kolkata-700 032, India"}]},{"given":"Nicholas","family":"Ballard","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Queen\u2019s University, Kingston, ON, K7L 3N6, Canada"}]},{"given":"Daniel","family":"Paz-Soldan","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Queen\u2019s University, Kingston, ON, K7L 3N6, Canada"}]},{"given":"Jack A.","family":"Barnes","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Queen\u2019s University, Kingston, ON, K7L 3N6, Canada"}]},{"given":"Hans-Peter","family":"Loock","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Queen\u2019s University, Kingston, ON, K7L 3N6, Canada"}]},{"given":"Timothy T.-Y.","family":"Lam","sequence":"additional","affiliation":[{"name":"Centre for Gravitational Physics, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia"}]},{"given":"Jong H.","family":"Chow","sequence":"additional","affiliation":[{"name":"Centre for Gravitational Physics, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia"}]},{"given":"Paolo","family":"De Natale","sequence":"additional","affiliation":[{"name":"Consiglio Nazionale delle Ricerche, Istituto Nazionale di Ottica (INO), Via Campi Flegrei, 34 I-80078 Napoli, Italy"}]}],"member":"1968","published-online":{"date-parts":[[2010,3,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1006\/ofte.1996.0036","article-title":"A Review of Recent Developments in Fiber Optic Sensor Technology","volume":"2","author":"Kersey","year":"1996","journal-title":"Opt. Fiber Technol"},{"key":"ref_2","unstructured":"Yu, F.T.S., and Yin, S. (2002). In Fiber Optic Sensors, Marcel Dekker, Inc."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"355","DOI":"10.1088\/0957-0233\/8\/4\/002","article-title":"In-Fibre Bragg Grating Sensors","volume":"8","author":"Rao","year":"1997","journal-title":"Meas. Sci. Technol"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1487","DOI":"10.1049\/el:19951037","article-title":"Interrogation of Fiberoptic in Interferometric Sensors Using Acoustooptic Tunable Filter","volume":"31","author":"Xu","year":"1995","journal-title":"Electron. Lett"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1930","DOI":"10.1364\/OL.23.001930","article-title":"Highly Sensitive Dynamic Strain Measurements by Locking Lasers to Fiber Bragg Gratings","volume":"23","author":"Lissak","year":"1998","journal-title":"Opt. Lett"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1923","DOI":"10.1364\/OL.30.001923","article-title":"Demonstration of a Passive Subpicostrain Fiber Strain Sensor","volume":"30","author":"Chow","year":"2005","journal-title":"Opt. Lett"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"S507","DOI":"10.1088\/1464-4258\/8\/7\/S31","article-title":"Interrogation of FBG-Based Strain Sensors by Means of Laser Radio-Frequency Modulation Techniques","volume":"8","author":"Gagliardi","year":"2006","journal-title":"J. Opt. A-Pure Appl. Opt"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"3093","DOI":"10.1103\/PhysRevLett.83.3093","article-title":"Ultrasensitive Surface Spectroscopy with a Miniature Optical Resonator","volume":"83","author":"Pipino","year":"1999","journal-title":"Phys. Rev. Lett"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"6594","DOI":"10.1021\/ac0491253","article-title":"Phase-Shift Fiber-Loop Ring-Down Spectroscopy","volume":"76","author":"Tong","year":"2004","journal-title":"Anal. Chem"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"4818","DOI":"10.1063\/1.1614877","article-title":"Fiber-Loop Ring-Down Spectroscopy: A Sensitive Absorption Technique for Small Liquid Samples","volume":"74","author":"Tong","year":"2003","journal-title":"Rev. Sci. Instrum"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1243","DOI":"10.1109\/50.400692","article-title":"Bragg Grating-Based Laser Sensors Systems with Interferometric Interrogation and Wavelength-Division Multiplexing","volume":"13","author":"Koo","year":"1995","journal-title":"J. Lightwave Technol"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"11077","DOI":"10.1364\/OE.17.011077","article-title":"Pico-Strain Multiplexed Fiber Optic Sensor Array Operating Down to Infra-Sonic Frequencies","volume":"17","author":"Littler","year":"2009","journal-title":"Opt. Express"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"724","DOI":"10.1364\/OPEX.12.000724","article-title":"Discrimination of Temperature and Strain with a Single Fbg Based on the Birefringence Effect","volume":"12","author":"Oh","year":"2004","journal-title":"Opt. Express"},{"key":"ref_14","unstructured":"Salza, M., Gagliardi, G., Di Maio, A., Ferraro, P., De Natale, P., Chehura, E., and Tatam, R.P. Laser-Frequency Locking Techniques for High-Sensitivity Strain Measurements by High-Birefringence Fiber Bragg Gratings and Resonators. San Diego, CA, USA."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2377","DOI":"10.1364\/OPEX.13.002377","article-title":"Fiber Bragg-Grating Strain Sensor Interrogation Using Laser Radio-Frequency Modulation","volume":"13","author":"Gagliardi","year":"2005","journal-title":"Opt. Express"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1007\/BF00702605","article-title":"Laser Phase and Frequency Stabilization Using an Optical Resonator","volume":"31","author":"Drever","year":"1983","journal-title":"Appl. Phys. B"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"888","DOI":"10.1088\/0964-1726\/13\/4\/027","article-title":"Characterization of the Response of Fibre Bragg Gratings Fabricated in Stress and Geometrically Induced High Birefringence Fibres to Temperature and Transverse Load","volume":"13","author":"Chehura","year":"2004","journal-title":"Smart Mater. Struct"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"441","DOI":"10.1016\/0030-4018(80)90069-3","article-title":"Laser Frequency Stabilization by Polarization Spectroscopy of a Reflecting Reference Cavity","volume":"35","author":"Hansch","year":"1980","journal-title":"Opt. Commun"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"2100","DOI":"10.1364\/JOSAB.11.002100","article-title":"Characterization of UV-Induced Birefringence in Photosensitive Ge-Doped Silica Optical Fibers","volume":"11","author":"Erdogan","year":"1994","journal-title":"J. Opt. Soc. Am. B"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1463","DOI":"10.1109\/JLT.2002.800259","article-title":"Numerical Analysis of the Contribution of the Transverse Asymmetry in the Photo-Induced Index Change Profile to the Birefringence of Optical Fiber","volume":"20","author":"Dossou","year":"2002","journal-title":"J. Lightwave Technol"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"3715","DOI":"10.1364\/OE.15.003715","article-title":"Interrogation of Fiber Bragg-Grating Resonators by Polarization-Spectroscopy Laser-Frequency Locking","volume":"15","author":"Gagliardi","year":"2007","journal-title":"Opt. Express"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1677","DOI":"10.1109\/68.544716","article-title":"Experimental Demonstration of a Fiber Bragg Grating Accelerometer","volume":"8","author":"Berkoff","year":"1996","journal-title":"IEEE Photon. Technol. Lett"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1605","DOI":"10.1109\/68.726764","article-title":"Flexural Beam-Based Fiber Bragg Grating Accelerometers","volume":"10","author":"Todd","year":"1998","journal-title":"IEEE Photon. Technol. Lett"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"085306","DOI":"10.1088\/0957-0233\/19\/8\/085306","article-title":"Design and Test of a Laser-Based Optical-Fiber Bragg-Grating Accelerometer for Seismic Applications","volume":"19","author":"Gagliardi","year":"2008","journal-title":"Meas. Sci. Technol"},{"key":"ref_25","unstructured":"Gagliardi, G., Salza, M., Lam, T.T.-Y., Chow, J.H., and De Natale, P. (, January October). 3-Axis Accelerometer Based on Lasers Locked to \u03a0\u2013Shifted Fibre Bragg Gratings. Edinburgh Conference Centre, Scotland, UK."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"1344","DOI":"10.1049\/el:19940920","article-title":"Pi-Phase-Shifted Periodic Distributed Structures in Optical Fibers by Uv Post-Processing","volume":"30","author":"Canning","year":"1994","journal-title":"Electron. Lett"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1063\/1.1142305","article-title":"Using Diode-Lasers for Atomic Physics","volume":"62","author":"Wieman","year":"1991","journal-title":"Rev. Sci. Instrum"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"4617","DOI":"10.1364\/OE.14.004617","article-title":"Laser Frequency-Noise-Limited Ultrahigh Resolution Remote Fiber Sensing","volume":"14","author":"Chow","year":"2006","journal-title":"Opt. Express"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"2735","DOI":"10.1364\/AO.48.002735","article-title":"Recording the Sound of Musical Instruments with Fbgs: The Photonic Pickup","volume":"48","author":"Loock","year":"2009","journal-title":"Appl. Optics"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"A16","DOI":"10.1021\/ac00265a711","article-title":"Chemical Sensors Based on Fiber Optics","volume":"56","author":"Seitz","year":"1984","journal-title":"Anal. Chem"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"105","DOI":"10.1016\/0022-2860(93)80093-B","article-title":"New Directions in Fiber Optic Chemical Sensors\u2014Sensors Based on Polymer Swelling","volume":"292","author":"Seitz","year":"1993","journal-title":"J. Mol. Struct"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"3859","DOI":"10.1021\/ac060490z","article-title":"Fiber-Optic Chemical Sensors and Biosensors","volume":"78","author":"Wolfbeis","year":"2006","journal-title":"Anal. Chem"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"135","DOI":"10.1080\/10408348808085620","article-title":"Chemical Sensors Based on Immobilized Indicators and Fiber Optics","volume":"19","author":"Seitz","year":"1988","journal-title":"Crit. Rev. Anal. Chem"},{"key":"ref_34","first-page":"41","article-title":"Fiber Optic Probes for Determining Enzyme-Activities","volume":"10","author":"Wolfbeis","year":"1988","journal-title":"Select. Electr. Rev"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"1075","DOI":"10.1088\/0957-0233\/17\/5\/S23","article-title":"Distributed Fibre Optics Polarimetric Chemical Sensor","volume":"17","author":"Caron","year":"2006","journal-title":"Meas. Sci. Technol"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"3567","DOI":"10.1364\/AO.41.003567","article-title":"Cavity-Ring-Down Principle for Fiber-Optic Resonators: Experimental Realization of Bending Loss and Evanescent-Field Sensing","volume":"41","author":"Sigrist","year":"2002","journal-title":"Appl. Optics"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"1140","DOI":"10.1088\/0957-0233\/17\/5\/S34","article-title":"Implementation of Optical Chemsensors Based on Hf-Etched Fibre Bragg Grating Structures","volume":"17","author":"Zhou","year":"2006","journal-title":"Meas. Sci. Technol"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"12","DOI":"10.1016\/j.optlaseng.2006.04.011","article-title":"Design and Operation of an Evanescent Optical Fiber Sensor","volume":"45","author":"Golnabi","year":"2007","journal-title":"Opt. Laser Eng"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1585","DOI":"10.1063\/1.1629279","article-title":"Surface-Plasmon-Resonance-Enhanced Cavity Ring-Down Detection","volume":"120","author":"Pipino","year":"2004","journal-title":"J. Chem. Phys"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1069","DOI":"10.1364\/OL.34.001069","article-title":"Surface-Plasmon Resonance Sensor Using Silica-Core Bragg Fiber","volume":"34","author":"Ma","year":"2009","journal-title":"Opt. Lett"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"2804","DOI":"10.1016\/j.bios.2009.02.007","article-title":"Novel U-Bent Fiber Optic Probe for Localized Surface Plasmon Resonance Based Biosensor","volume":"24","author":"Sai","year":"2009","journal-title":"Biosens. Bioelectron"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"199","DOI":"10.1016\/j.snb.2008.12.020","article-title":"Novel Concept of Multi-Channel Fiber Optic Surface Plasmon Resonance Sensor","volume":"139","author":"Spackova","year":"2009","journal-title":"Sensors and Actuators B-Chemical"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1878","DOI":"10.1364\/OL.27.001878","article-title":"Cavity-Enhanced Spectroscopy in Optical Fibers","volume":"27","author":"Gupta","year":"2002","journal-title":"Opt. Lett"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"655","DOI":"10.1016\/j.trac.2006.05.003","article-title":"Ring-Down Absorption Spectroscopy for Analytical Microdevices","volume":"25","author":"Loock","year":"2006","journal-title":"Trac-Trend Anal. Chem"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"1774","DOI":"10.1364\/OL.34.001774","article-title":"Fiber Loop Ring-Down Spectroscopy with a Long-Period Grating Cavity","volume":"34","author":"Pu","year":"2009","journal-title":"Opt. Lett"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"272","DOI":"10.1364\/OL.28.000272","article-title":"Shift of Whispering-Gallery Modes in Microspheres by Protein Adsorption","volume":"28","author":"Arnold","year":"2003","journal-title":"Opt. Lett"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"1896","DOI":"10.1364\/OL.31.001896","article-title":"Heavy Water Detection Using Ultra-High-Q Microcavities","volume":"31","author":"Armani","year":"2006","journal-title":"Opt. Lett"},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"591","DOI":"10.1038\/nmeth.1221","article-title":"Whispering-Gallery-Mode Biosensing: Label-Free Detection Down to Single Molecules","volume":"5","author":"Vollmer","year":"2008","journal-title":"Nat. Methods"},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"13158","DOI":"10.1364\/OE.16.013158","article-title":"Loss Determination in Microsphere Resonators by Phase-Shift Cavity Ring-Down Measurements","volume":"16","author":"Barnes","year":"2008","journal-title":"Opt. Express"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"288","DOI":"10.1364\/OL.7.000288","article-title":"All-Single-Mode Fiber Resonator","volume":"7","author":"Stokes","year":"1982","journal-title":"Opt. 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