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
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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Posted Content
Ultrahigh-Resolution Fiber-Optic Sensing Using a High-Finesse, Meter-Long Fiber Fabry-Perot Resonator
TL;DR: The interferometer (FFPI) was used in this paper to achieve a nominal, noise-limited strain resolution of 800 f σ /sqrt(Hz) within 1 to 100 Hz.
Proceedings ArticleDOI
Evolution of optical sensors for determining the concentration of liquid solutions and their temperature sensitivity
TL;DR: In depth review of various optical methods for determining concentration of liquid solutions reported in literature is undertaken and a comparison among all the methods is presented with an eye to further improvement in the technology.
Journal ArticleDOI
A novel extrinsic Fabry-Perot interferometric sensor for Inconel 718 tensile properties measurement
TL;DR: In this article, an innovative fiber optic sensor based on extrinsic Fabry-Perot interferometer (EFPI) was used to accurately measure the tensile strain of the Inconel 718 specimen.
Proceedings ArticleDOI
A cost-effective edge-filter-based FBG strain interrogator using catastrophic fuse effect microcavity interferometers
Camilo A. R. Díaz,Carlos Marques,M. Fátima Domingues,Moisés R. N. Ribeiro,Anselmo Frizera Neto,Maria José Pontes,Paulo André,Paulo Antunes +7 more
TL;DR: In this paper, a simple, compact, stable and inexpensive in-line solution based on catastrophic fuse effect micro-cavity interferometers for edge-filter strain interrogation of a fiber Bragg grating sensor is presented.
References
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