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
Dual-resonance sensing for environmental refractive index based on quasi-BIC states in all-dielectric metasurface
TL;DR: In this paper , an all-dielectric metasurface was proposed for environmental refractive index sensing based on quasi-BIC with an enhanced stability, simultaneously taken into account an enlarged detection range, a high Q factor and a relatively high sensitivity.
Journal ArticleDOI
An Optimized Self-Compensated Solution for Temperature and Strain Cross-Sensitivity in FBG Interrogators Based on Edge Filter.
Mariana Silveira,Helder Roberto de Oliveira Rocha,Paulo Antunes,Paulo André,Marcelo E. V. Segatto,Anselmo Frizera,Camilo A. R. Díaz +6 more
TL;DR: In this paper, an edge-filter-based interrogator is proposed and the central peaks of two fiber Bragg gratings (sensor and reference) are matched with the positive and negative slopes of a Fabry-Perot interferometer that acts as an optical filter.
Journal ArticleDOI
Optimization of a liquid refractive index sensor based on an integrated optic slot-waveguide directional coupler
TL;DR: In this article, an integrated optic silica slot-waveguide directional coupler is investigated for its ability to measure the refractive index (n) of a liquid biochemical species, and the best geometrical dimensions achieved from a simulation with the beam propagation method (BPM) were a waveguide width of 6um, a gap of 2.5um, and a channel length of 2,000um.
Journal ArticleDOI
High-Sensitivity and Temperature-Insensitive Refractometer Based on TNHF Structure for Low-Range Refractive Index Measurement
TL;DR: In this paper, a high-sensitivity and temperature-insensitive refractometer based on a tapered no-core-hollow-core fiber (TNHF) structure is proposed for low-range RI measurement.
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