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
Mechanism measurement of micro-displacement based on a novel MZ interferometer
TL;DR: In this paper, a micro-displacement sensor based on a novel MZ interferometer is proposed and experimentally demonstrated, which is formed by a spherical shape structure incorporating a core-offset structure in single mode fibers (SMF).
Proceedings ArticleDOI
Multiplexed refractive index-based sensing using optical fiber microcavities
TL;DR: In this article, two Fabry-Perot micro-cavities were written serially along the fiber with two different cavity lengths, producing a total of four reflecting surfaces.
Proceedings ArticleDOI
A fiber volume strain sensor based on Mach-Zehnder interferometer
TL;DR: In this article, a fiber volume strain sensor based on a Mach-Zehnder interferometer (MZI) is proposed and experimentally demonstrated in a polyethylene hollow column and a resolution of 3.29×10 e is achieved when the 40mm diameter of sensing hollow column is 40mm.
Proceedings ArticleDOI
Research of PZT Modulation Factor with High Precision and Stability Based on J1/J3 Method
TL;DR: In this paper, a new algorithm to calculate the PZT modulation factor based on J1/J3 method was introduced, which obtian high property in PGC demodulation.
Journal ArticleDOI
Hermetic Welding of an Optical Fiber Fabry–Pérot Cavity for a Diaphragm-Based Pressure Sensor Using CO2 Laser
TL;DR: In this paper , a diaphragm-based hermetic optical fiber Fabry-Pérot (FP) cavity is proposed and demonstrated for pressure sensing, which has a linear response to the change in pressure, with a sensitivity of −2.02 nm/MPa in the range of 0 to 4 MPa.
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