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
A temperature-compensated fibre optic extrinsic Fabry–Perot interferometric displacement sensor for fault measurement in geomechanics
TL;DR: In this paper, a fiber optic extrinsic Fabry-Perot interferometric (EFPI) displacement sensor for fault measurement in geomechanics is experimentally demonstrated.
Proceedings ArticleDOI
The Fiber-Wireless Sensor System for Temperature Monitoring Using Sagnac-Loop Interferometer
TL;DR: In this paper the proposal of fiber-wireless monitoring network with power-modulated Sagnac loop based temperature sensor setup is presented, and the presented novel fiber optic sensor setup operates on mapping optical power to given ambient temperature.
Journal ArticleDOI
In-line reflective Mach-Zehnder interferometer based on a tilted in-fiber beam splitter.
Hua Zhang,Daodang Wang +1 more
TL;DR: A fiber in-line reflective Mach-Zehnder interferometer is proposed and experimentally demonstrated, which is based on a tilted in-fiber beam splitter inscribed by a femtosecond laser and can be used for environmental refractive index sensing in a convenient manner.
Journal ArticleDOI
Fiber Vector Bend Sensor Based on Multimode Interference and Image Tapping
Ziyang Zhang,Aashia Rahman,Julia Fiebrandt,Yu Wang,Kai Sun,Jiajun Luo,Kalaga Madhav,Martin Roth +7 more
TL;DR: A grating-less fiber vector bend sensor is demonstrated using a standard single mode fiber spliced to a multimode fiber as a multimodal interference device and the bend radius and its direction can be determined by comparing the relative light intensities received at the seven outputs.
Book ChapterDOI
Silica Optical Fiber Sensors Production Methods
TL;DR: This chapter moves to the details of the different production methods of Silica OFSs, which will be a key issue in the argument of adopting OFS in the concept of IoT, with a wide range of applications.
References
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Journal ArticleDOI
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