Acousto-Ultrasonic Optical Fiber Sensors: Overview and State-of-the-Art
Graham Wild,Steven Hinckley +1 more
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TLDR
A review of acoustic and ultrasonic optical fiber sensors (OFSs) is given in this article, which covers optical fiber sensing methods for detecting dynamic strain signals, including general sound and acoustic signals, high-frequency signals, and other signals such as acoustic emissions, and impact induced dynamic strain.Abstract:
This paper gives a review of acoustic and ultrasonic optical fiber sensors (OFSs). The review covers optical fiber sensing methods for detecting dynamic strain signals, including general sound and acoustic signals, high-frequency signals, i.e., ultrasonic/ultrasound, and other signals such as acoustic emissions, and impact induced dynamic strain. Several optical fiber sensing methods are included, in an attempted to summarize the majority of optical fiber sensing methods used to date. The OFS include single fiber sensors and optical fiber devices, fiber-optic interferometers, and fiber Bragg gratings (FBGs). The single fiber and fiber device sensors include optical fiber couplers, microbend sensors, refraction-based sensors, and other extrinsic intensity sensors. The optical fiber interferometers include Michelson, Mach-Zehnder, Fabry-Perot, Sagnac interferometers, as well as polarization and model interference. The specific applications addressed in this review include optical fiber hydrophones, biomedical sensors, and sensors for nondestructive evaluation and structural health monitoring. Future directions are outlined and proposed for acousto-ultrasonic OFS.read more
Citations
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Fiber-Optic Hydrophone
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High-sensitivity ultrasonic phase-shifted fiber Bragg grating balanced sensing system
Qi Wu,Yoji Okabe +1 more
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References
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Book
Fiber Bragg Gratings
TL;DR: Kashyap et al. as mentioned in this paper presented a comprehensive treatise on fiber bragg gratings (FBGs) and addressed issues such as the merits of one solution over another; why particular fabrication methods are preferred; and what advantages a user may gain from certain techniques.
Book
Fiber Bragg gratings
TL;DR: The most common fabrication techniques (interferometric, phase mask, and point by point) are examined in detail with reference to the advantages and disadvantages in utilizing them for inscribing Bragg gratings as mentioned in this paper.
Journal ArticleDOI
Dielectric-fibre surface waveguides for optical frequencies
K.C. Kao,G.A. Hockham +1 more
TL;DR: In this paper, the choice of the mode of propagation for a dielectric-fibre waveguide used for communication purposes is governed by consideration of loss characteristics and information capacity.
Journal ArticleDOI
Quadrature phase-shifted, extrinsic Fabry-Perot optical fiber sensors
TL;DR: It is demonstrated the operation of a quadrature phase-shifted extrinsic Fabry-Perot fiber-optic sensor for the detection of the amplitude and the relative polarity of dynamically varying strain.
Journal ArticleDOI
Fiber optics strain gauge.
C D Butter,G. B. Hocker +1 more
TL;DR: A fiber optics strain gauge measuring strains of <0.4 × 10.2 × 10 m 1 is demonstrated, utilizing the change in optical pathlength caused by strain in a fiber.