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
Optical Millinewton Force Sensors Based on GaN Devices Integrated With Bionic-Structured PMDS Films
TL;DR: In this paper , optical millinewton force sensors are developed by integrating GaN devices with bionic-structured polydimethylsiloxane (PDMS) films.
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Optical Fiber‐Based Gas Sensing for Early Warning of Thermal Runaway in Lithium‐Ion Batteries
Xuanren Chen,Lin Gan,Xin Guo +2 more
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Distributed optical fiber sensing system based on semiconductor lasers with mutual unbalanced double optical injection
TL;DR: In this article , a distributed optical fiber sensing system based on semiconductor lasers with mutual unbalanced double optical injection is proposed, where the optical phase modulation caused by an external vibration acting on the sensing fiber is converted into the intensity modulation by the unbalance double-optical injection effect of the laser.
Posted ContentDOI
Long-Range Optical Fiber Based Distributed Mechanical Vibration Sensing
TL;DR: In this article, the authors deal with the sensing system utilizing the standard singlemode optical fiber as a distributed sensor for detection, localization and classification of the mechanical vibrations that can be generated by various events such as walking or running people, moving cars, trains, etc.
Patent
Optical sensor system with spectral analysis arrangement detecting a periodicity in a spectral response of a fabry-perot structure
Gruca Grzegorz,Niek Rijnveld +1 more
TL;DR: In this article, the phase evolution of the periodicity of the optical path length between the two reflective surfaces of the Fabry-Perot structure was detected by a spectral analysis arrangement.
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