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
Citations
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Proceedings ArticleDOI
Temperature dependent behavior of optical loss from hydrogen species in optical fibers
TL;DR: In this paper, the authors reported on the temperature dependent behavior of absorption bands generated in optical fibers via hydrogen exposure at 800 °C and showed that at higher temperatures the absorption intensity in these two bands was smaller than at room temperature.
Journal ArticleDOI
Effect of Acid Dopants Toward Polyaniline Based Optical Sensor for Lead Detection
TL;DR: In this article, a polyaniline (PAni) coated optical fiber sensor with Mach-Zehnder interferometers configuration was developed to overcome the pitfalls of conventional sensing methods such as atomic absorption spectrometry (AAS), and anodic stripping voltammetry (ASV) in Pb detection.
Journal ArticleDOI
Analytical Inverse Design of Polarization-Insensitive Photonic Filters by Tailoring Fabry-Perot Interference
TL;DR: In inverse design for a simple class of optical setups is rigorously performed and, if the employed medium is very dense and the working band narrow enough, sharp filters with increased frequency selectivity are obtained.
Proceedings ArticleDOI
Temperature cross-sensitivity compensation in liquid level sensor using Mach-Zehnder interferometers
Camilo A. R. Díaz,Arnaldo Leal,Anselmo Frizera,Maria José Pontes,Paulo Antunes,Paulo André,Moisés R. N. Ribeiro +6 more
TL;DR: In this article, the authors presented a technique for temperature cross-sensitivity compensation in liquid level sensor based on an in-fiber Mach-Zehnder interferometer. And the proposed approach is suitable for industrial applications such as chemical processing, fuel storage and transportation systems, oil tanks/reservoirs, and treatment plants, where there is simultaneous variations of temperature and level.
References
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