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
Citations
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Journal ArticleDOI
Measurement of cable forces for automated monitoring of engineering structures using fiber optic sensors: A review
Yadong Yao,Yan Meng,Yi Bao +2 more
TL;DR: The fiber optic sensors that have been developed and applied to measure cable forces, including fiber Bragg grating, interferometer, and fully distributed sensors are reviewed, including the sensing principle, sensor design, deployment on cables, data analytics, and sensing performance.
Journal ArticleDOI
Effect of MMF stub on the sensitivity of a photonic crystal fiber interferometer sensor at 1550 nm
Papiya Dhara,Vinod Kumar Singh +1 more
TL;DR: In this article, a simple photonic crystal fiber (PCF) based Mach-Zehnder interferometric sensor is reported for sensing the refractive index and level of liquid, which is formed by all-fiber in-line single mode-multi mode-photonic crystal-single mode fiber structure using the fusion splicing method.
Journal ArticleDOI
A Non-Intrusive Electrical Discharge Localization Method for Gas Insulated Line Based on Phase-Sensitive OTDR and Michelson Interferometer
TL;DR: In this paper, a nonintrusive distributed optical fiber sensing system based on the phase-sensitive optical time domain reflectometer (phi-OTDR) and the optical fiber Michelson interference is proposed.
Journal ArticleDOI
Sensing with ultra-short Fabry-Perot cavities written into optical micro-fibers
Stephen C. Warren-Smith,Stephen C. Warren-Smith,Ricardo M. André,Ricardo M. André,Jan Dellith,Tina Eschrich,Martin Becker,Hartmut Bartelt +7 more
TL;DR: In this paper, the Fabry-Perot cavities are written into optical micro-fibers using focused ion beam milling and demonstrated their use for sensing of both bulk refractive index and thin-layer coatings.
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