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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Journal ArticleDOI
A fast Maximum Likelihood Estimation algorithm for demodulating Fiber White-Light Interferometry
Journal ArticleDOI
Sensitivity enhanced fiber optic temperature sensor based on optical carrier microwave photonic interferometry with harmonic Vernier effect
TL;DR: In this paper , a sensitivity enhanced fiber optic temperature sensor based on optical carrier microwave interferometry (OCMI) with harmonic Vernier effect is proposed and experimentally demonstrated, which is composed of two cascaded Mach-Zehnder interferometers with different optical length differences.
Journal ArticleDOI
Impact of support material deformation in MEMS bulk micromachined diaphragm pressure sensors
TL;DR: In this article, an extrinsic fiber-optic Fabry-Perot pressure sensor, based on micro-electromechanical system, is developed and used to investigate optical deflection response.
Journal ArticleDOI
Performance improvement in Mach–Zehnder interferometer-based refractive index sensor using elliptical photonic nanowires
TL;DR: In this article, a modified Mach-Zehnder interferometer design based on elliptical silica photonic nanowires was numerically investigated, which is capable of determining the RI of benzene solutions with different concentrations in water and detecting a RI variation of the order of 10−6 RI units in only a 1-mm sensitive area.
Proceedings ArticleDOI
Study of an in-line fiber Mach-Zehnder interferometer with peanut-shape structure for refractive index sensing
Fangda Yu,Peng Xue,Jie Zheng +2 more
TL;DR: In this paper, a peanut-shape structure based in-line fiber Mach-Zehnder interferometer (MZI) was fabricated by commercial available fusion splicer and the power distribution of the modes in the device was calculated and measured experimentally.
References
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