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
High Rate Dynamic Monitoring with Fabry–Perot Interferometric Sensors: An Alternative Interrogation Technique Targeting Biomedical Applications
TL;DR: Preliminary results show that the developed sensing architecture can be a suitable solution to monitor biomedical parameters such as the carotid pulse wave and good agreement between the theoretical and experimental results verified the reliability of the proposed methodology.
Journal ArticleDOI
Temperature Monitoring With Fiber Bragg Grating Sensors in Nonuniform Conditions
TL;DR: This paper analyzes the response of commercial FBGs employed as temperature sensors in applications that imply large temperature gradients, such as in laser-based thermal treatments of solid tumors.
Journal ArticleDOI
Advanced Fiber Sensors Based on the Vernier Effect
TL;DR: The optical Vernier effect as mentioned in this paper uses one interferometer as a fixed part of the Vernier scale and the other as a sliding part of a Vernier scaling scale to improve the performance of optical fiber interferometers.
Journal ArticleDOI
High-sensitivity optical fiber temperature sensor of cascaded FSI and MZI based on Vernier effect
TL;DR: In this article, a high-sensitivity optical fiber temperature sensor based on the Vernier effect of cascaded fiber Sagnac interferometer (FSI) and Mach-Zehnder interferometers (MZI) is proposed and experimentally demonstrated.
Journal ArticleDOI
Monitoring of Carbon Dioxide Using Hollow-Core Photonic Crystal Fiber Mach-Zehnder Interferometer.
Farid Ahmed,Vahid Ahsani,Kaveh Nazeri,Ehsan Marzband,Colin Bradley,Ehsan Toyserkani,Martin B.G. Jun +6 more
TL;DR: A fiber-optic Mach–Zehnder interferometer (MZI) is proposed and demonstrated for the laboratory-scale monitoring of carbon dioxide concentration and reveals the great potential of the fiber- optic approach for environmental monitoring of CO2.
References
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