Journal ArticleDOI
Highly sensitive dynamic strain measurements by locking lasers to fiber Bragg gratings
Boaz Lissak,Ady Arie,Moshe Tur +2 more
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TLDR
A novel, sensitive, simple, and robust strain interrogation technique is analyzed and experimentally tested, which achieves high dynamic strain sensitivity of 45 picostrain/ radicalHz rms at 3 kHz.Abstract:
A novel, sensitive, simple, and robust strain interrogation technique is analyzed and experimentally tested. By locking a laser wavelength to the midreflection wavelength of a standard fiber Bragg grating and measuring the error signal, we achieve high dynamic strain sensitivity of 45 picostrain/Hz rms at 3 kHz, where the dominant noise in the experiment is the laser frequency noise.read more
Citations
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BookDOI
Smart fibres, fabrics and clothing
TL;DR: Smart technology for textiles and clothing as discussed by the authors is an overview and review of smart textile composites integrated with fibre optic sensors. But it is not a comprehensive review of the entire literature.
Journal ArticleDOI
Dynamic strain measurement in optical fibers by stimulated Brillouin scattering.
TL;DR: Preliminary experimental results carried out with a perturbation frequency up to 98 Hz demonstrate the validity of the proposed dynamic strain measurements in optical fibers based on the stimulated Brillouin scattering interaction between two counterpropagating optical pulses.
Journal ArticleDOI
Response of a fiber Bragg grating ultrasonic sensor
TL;DR: In this article, a fiber Bragg grating (FBG) sensor for detection of ultrasonic waves in liquids and solid structures is investigated, which contains a fiber probe with a FBG, a tunable narrowband laser source, and a photodetector.
Journal ArticleDOI
Demonstration of a passive subpicostrain fiber strain sensor.
TL;DR: A fiber Fabry-Perot (FFP) sensor is demonstrated that is capable of detecting subpicostrain signals, from 100 Hz and extending beyond 100 kHz, using the Pound-Drever-Hall (PDH) frequency locking technique.
Journal ArticleDOI
Static fiber-Bragg grating strain sensing using frequency-locked lasers
Ady Arie,Boaz Lissak,Moshe Tur +2 more
TL;DR: In this article, a novel and highly sensitive static strain interrogation technique is demonstrated, where the sensing element is a fiber-Bragg grating (FBG) and the light source is a frequency-locked diode laser.
References
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Journal ArticleDOI
Fiber grating sensors
Alan D. Kersey,Michael A. Davis,Heather Patrick,Michel LeBlanc,K.P. Koo,Charles G. Askins,Martin A. Putnam,E.J. Friebele +7 more
TL;DR: In this paper, the authors review the recent developments in the area of optical fiber grating sensors, including quasi-distributed strain sensing using Bragg gratings, systems based on chirped gratings and intragrating sensing concepts.
Journal ArticleDOI
High-resolution fibre-grating based strain sensor with interferometric wavelength-shift detection
TL;DR: In this paper, an unbalanced-interferometer wavelength discriminator was used for the detection of dynamic strain induced wavelength shifts in fiber Bragg grating sensors, which is capable of sub-nanostrain resolution (0.6 ne/√(Hz) at 500 Hz).
Journal ArticleDOI
Extracavity laser band-shape and bandwidth modification
TL;DR: In this paper, a technique for modifying the laser power spectrum by use of an acousto-optic modulator is described, and the theory of the power spectrum resulting from frequency modulation by Gaussian noise is reviewed.
Journal ArticleDOI
Bragg grating-based laser sensors systems with interferometric interrogation and wavelength division multiplexing
K.P. Koo,Alan D. Kersey +1 more
TL;DR: An interferometric detection technique for interrogating laser wavelength shifts due to measurand induced laser cavity strain with high resolution from both singlemode and multimode lasers is presented in this article.
Journal ArticleDOI
Chirped gratings produced in photosensitive optical fibres by fibre deformation during exposure
TL;DR: In this paper, a technique for writing chirped-period gratings by UV exposure in photosensitive optical fibres is reported. But the work is limited to the case of boron-germania codoped fibres, with performance parameters ranging from 99% reflectivity with 7.5 nm bandwidth, to 5% reflective over >17nm bandwidth.