Interferometric Fiber Optic Sensors
Byeong Ha Lee,Youngho Kim,Kwan Seob Park,Joo Beom Eom,Myoung Jin Kim,Byung Sup Rho,Hae Young Choi +6 more
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TLDR
Each type of interferometric sensor is reviewed in terms of operating principles, fabrication methods, and application fields and some specific examples of recently reported interferometeric sensor technologies are presented in detail to show their large potential in practical applications.Abstract:
Fiber optic interferometers to sense various physical parameters including temperature, strain, pressure, and refractive index have been widely investigated. They can be categorized into four types: Fabry-Perot, Mach-Zehnder, Michelson, and Sagnac. In this paper, each type of interferometric sensor is reviewed in terms of operating principles, fabrication methods, and application fields. Some specific examples of recently reported interferometeric sensor technologies are presented in detail to show their large potential in practical applications. Some of the simple to fabricate but exceedingly effective Fabry-Perot interferometers, implemented in both extrinsic and intrinsic structures, are discussed. Also, a wide variety of Mach-Zehnder and Michelson interferometric sensors based on photonic crystal fibers are introduced along with their remarkable sensing performances. Finally, the simultaneous multi-parameter sensing capability of a pair of long period fiber grating (LPG) is presented in two types of structures; one is the Mach-Zehnder interferometer formed in a double cladding fiber and the other is the highly sensitive Sagnac interferometer cascaded with an LPG pair.read more
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Journal ArticleDOI
Multicore microstructured optical fibre for sensing applications
L. Sojka,L. Sojka,L. Pajewski,M. Śliwa,Pawel Mergo,Trevor M. Benson,Slawomir Sujecki,Elżbieta Bereś-Pawlik +7 more
TL;DR: In this article, the authors present the sensing capabilities of a novel N-path Mach-Zehnder interferometer (MZI) that relies on a multicore microstructured optical fiber (MC-MOF) connected between two sections of standard single mode fiber.
Journal ArticleDOI
Volume Strain Sensor Based on Spectra Analysis of In-Fiber Modal Interferometer
TL;DR: In this paper, an optical in-fiber modal interferometer-based volume strain sensor for earthquake prediction is proposed and experimentally demonstrated by wrapping a multimode-singlemode-multimode fiber structure onto a polyurethane hollow column.
Journal ArticleDOI
A Fiber Ring Laser Sensor with a Side Polished Evanescent Enhanced Fiber for Highly Sensitive Temperature Measurement.
TL;DR: Experimental results demonstrate that the side polished fiber can efficiently excite high-order cladding modes which enhance the modular interference increase the interaction between the evanescent wave and the isopropanol.
Mach Zehnder Interferometer and its Applications
TL;DR: In this article, the authors describe the design of Mach Zehnder Interferometer and review its applications in emerging optical communication networks, which is basically used to measure relative phase shift between two collimated beams from a coherent light source.
Journal ArticleDOI
Application of fiber-optic curvature sensor in deformation measurement process
TL;DR: In this article, an experiment performed in laboratory conditions, for the purpose of comparison of multiple methods for one-dimensional (1D) deformations detection, is described, where the fiber-optic curvature sensor (FOCS) method was applied as the primary one.
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