Characterization of Long-period Grating Refractive Index Sensors and Their Applications
Hiroshi Tsuda,Kei Urabe +1 more
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Experimental results demonstrated that the sensitivity characteristics of LPGs to refractive index could be controlled by grating length and bend radius.Abstract:
The influence of grating length and bend radius of long-period gratings (LPGs) on refractive index sensing was examined. Sensitivity to refractive indexes smaller than that of silica could be enhanced by bending LPGs. Bent LPGs lost sensitivity to refractive indexes higher than that of silica, whereas a 20-mm-long LPG arranged in a straight line had considerable sensitivity. These experimental results demonstrated that the sensitivity characteristics of LPGs to refractive index could be controlled by grating length and bend radius.read more
Citations
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Fiber Bragg grating sensors for monitoring of physical parameters: a comprehensive review
TL;DR: Fiber Bragg grating has embraced the area of fiber optics since the early days of its discovery, and most fiber optic sensor systems today make use of fiber Bragg-grating technology as discussed by the authors.
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Plasmonic Optical Fiber-Grating Immunosensing: A Review.
TL;DR: Recent progress made with different kinds of gratings are reviewed: uniform, tilted and eccentric short-period gratings as well as long-period fiber gratings, allowing both a high sensitivity and a low limit of detection to be reached in immunosensing.
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Corrosion Sensors for Structural Health Monitoring of Oil and Natural Gas Infrastructure: A Review
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A review of refractometric sensors based on long period fibre gratings.
TL;DR: This paper reviews the recent path towards the development of ultrahigh sensitive optical fibre refractometric sensors and suggests a number of approaches that should be considered for further development.
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.
Journal ArticleDOI
Optical fiber long-period grating sensors.
TL;DR: A novel class of highly sensitive sensors based on long-period fiber gratings that can be implemented with simple and inexpensive demodulation schemes are presented.
Journal ArticleDOI
Optical fibre long-period grating sensors: characteristics and application
Stephen W. James,Ralph P. Tatam +1 more
TL;DR: In this paper, the authors reviewed recent research on fiber optic long-period gratings (LPGs) with emphasis placed upon the characteristics of LPGs that make them attractive for applications in sensing strain, temperature, bend radius and external index of refraction.
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
Sensitivity characteristics of long-period fiber gratings
Xuewen Shu,Lin Zhang,Ian Bennion +2 more
TL;DR: In this paper, the sensitivity of long-period fiber gratings (LPFGs) is investigated as a function of temperature, strain, and surrounding refractive index, with particular attention to the higher order cladding modes and the possibilities for ultrasensitive sensors.
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