Results 171 to 180 of about 3,335 (216)
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2012
Fiber optics has emerged as a promising sensing technology over the past two decades. Fiber optic sensors (FOS) have generated great interest due to their small size, immunity to electro-magnetic interference and radio frequency (RF) interference, inherent safety, and accuracy.
R. Suresh, S. C. Tjin, J. Hao
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Fiber optics has emerged as a promising sensing technology over the past two decades. Fiber optic sensors (FOS) have generated great interest due to their small size, immunity to electro-magnetic interference and radio frequency (RF) interference, inherent safety, and accuracy.
R. Suresh, S. C. Tjin, J. Hao
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Random fiber Bragg grating Raman fiber laser
Optics Letters, 2014We demonstrate for the first time to our knowledge a Raman random fiber laser (RRFL) based on a long random fiber Bragg grating (RFBG-RRFL). Unlike other recently demonstrated random fiber lasers that rely on incoherent Rayleigh scattering feedback, the present scheme uses randomly distributed phase shifts inside a fiber-meter long Bragg grating as a ...
Mathieu, Gagné, Raman, Kashyap
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Comparative analysis of silica fiber Bragg grating and chalcogenide fiber Bragg grating
Materials Today: Proceedings, 2021Abstract Sensing performance of silica fiber Bragg grating (FBG) and chalcogenide FBG are compared in presence of apodization functions. The Bessel and Gaussian apodization functions are chosen in this analysis. These fibers are compared on the basis of their sensitivity, detection accuracy, quality parameter and sidelobe suppression ability ...
Souryadipta Maiti, Vivek Singh
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Fiber Bragg grating technology
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society, 2002Bragg gratings in fiber and planar waveguides are now coming into practical use for telecommunications, data communications, and signal processing applications. New high power fiber lasers are also using fiber gratings. Various devices for these applications require different types of Bragg gratings.
W.W. Morey, G.A. Ball
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Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678), 2004
An optical fiber polarizer is constructed with a fiber Bragg grating (FBG) based on birefringence effects induced by a transverse force applied to a section of the grating. In this work we present the principle of operation and experimental results of this device.
P. Torres +3 more
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An optical fiber polarizer is constructed with a fiber Bragg grating (FBG) based on birefringence effects induced by a transverse force applied to a section of the grating. In this work we present the principle of operation and experimental results of this device.
P. Torres +3 more
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Microstructured Fiber Bragg Gratings
Journal of Lightwave Technology, 2009The first fiber Bragg gratings were accidentally written in a Ge-doped silica fiber using a high power argon-ion laser [Hill 1978]. Following this first evidence of photosensitivity in optical fibers, a huge effort was put into fiber gratings: improving their fabrication (they are now all externally inscribed), obtaining complex profiles, optimizing ...
Andrea Cusano +2 more
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2019
According to the optical structure and sensing principle, fiber gratings are divided into phase shift grating, chirped grating, blazed grating, long period grating, and Bragg grating. Based on the basic principle and theoretical analysis of fiber Bragg grating, this chapter systematically introduces and analyzes the sensing principle, structure design ...
Yanliang Du +3 more
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According to the optical structure and sensing principle, fiber gratings are divided into phase shift grating, chirped grating, blazed grating, long period grating, and Bragg grating. Based on the basic principle and theoretical analysis of fiber Bragg grating, this chapter systematically introduces and analyzes the sensing principle, structure design ...
Yanliang Du +3 more
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Top-hat random fiber Bragg grating
Optics Letters, 2015We examined the possibility of using noise or pseudo-random variations of the refractive index in the design of fiber Bragg gratings (FBGs). We demonstrated theoretically and experimentally that top-hat FBGs may be designed and fabricated using this approach.
Hongwei, Yin +2 more
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Periodic waves in fiber Bragg gratings
Physical Review E, 2008We construct two families of exact periodic solutions to the standard model of fiber Bragg grating (FBG) with Kerr nonlinearity. The solutions are named "sn" and "cn" waves, according to the elliptic functions used in their analytical representation. The sn wave exists only inside the FBG's spectral bandgap, while waves of the cn type may only exist at
Chow, KW +5 more
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Fiber Bragg grating cryogenic temperature sensors
Applied Optics, 1996Temperature sensing to as low as 80 K was demonstrated with 1.55-μm fiber Bragg gratings. The gratings were bonded on substrates to increase sensitivity, and a shift of the reflection wavelength was measured. The temperature sensitivity was 0.02 nm/K at 100 K when an aluminum substrate was used and 0.04 nm/K at 100 K when a poly(methyl methacrylate ...
S, Gupta +3 more
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