Results 191 to 200 of about 6,027 (232)
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Magnetostrictive composite–fiber Bragg grating (MC–FBG) magnetic field sensor
Sensors and Actuators A: Physical, 2012Abstract We report a magnetostrictive composite–fiber Bragg grating (MC–FBG) magnetic field sensor based on the direct coupling of the magnetostrictive strain in an epoxy-bonded Terfenol-D particle pseudo-1–3 MC actuator with a FBG strain sensor. The MC–FBG sensor exhibits a large and fairly linear quasistatic peak wavelength shift of 0.68 nm under ...
Heliang Liu, Siu Wing Or, Hwa Yaw Tam
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Embedding optical Fiber Bragg Grating (FBG) sensors in 3D printed casings
Optical Fiber Technology, 2019Abstract This paper aims to numerical and experimentally study and propose Fiber Bragg Grating (FBG) sensors embedded in 3D printed casings. 3D printed casings offer design freedom, enabling strain measurement of structural systems with complex configuration, and, at low cost due to its easiness to manufacture.
Natalia Reggiani Manzo +3 more
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Fiber Bragg-grating (FBG) resonators for high-sensitivity multi-parameter sensing
2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, 2007In this work, we have devised different ways to interrogate a single-mode FBGFP sensor, based on both the PDH lock and a polarization-spectroscopy scheme, which extends the idea of Hansch et al. and exploits the internal fiber birefringence and the additional birefringence induced by the grating-inscription process.
Gagliardi G. +3 more
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Hydrogen sensors based on palladium electroplated fiber Bragg gratings (FBG)
13th International Conference on Optical Fiber Sensors, 1999The response of a new hydrogen sensor based on palladium electroplated Fiber Bragg Grating (FBG) in 0.6p hydrogen at 95°C is reported. A heat treatment at 150°C in air is critical to fast sensor response.
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Application of the fiber Bragg grating (FBG) sensors in coal mines
SPIE Proceedings, 2013The FBG strain sensors were applied to the Dongtan Mine to monitor the stress variation of the lined wall in the gateway retained along goaf of No. 3203 coal mining face on line. The results showed that the FBG strain sensor with high measuring range could measure the stress variation accurately during the support process of the gateway retained along ...
Jinyu Wang +4 more
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Fiber Bragg Grating (FBG) based magnetic extensometer for ground settlement monitoring
Sensors and Actuators A: Physical, 2019Abstract Monitoring for sub-surface settlement in deep excavation construction and tunneling works will provide an early indication of potential settlement or sinkhole formation at the ground surface. Currently, rod and magnetic extensometers may be used to monitor sub-surface settlement, with the latter most commonly used.
Muneesh Maheshwari +4 more
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Fiber Bragg grating interrogation using FBG filters and artificial neural network
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), 2017Optical fiber sensors have become a popular alternative to traditional electronic sensors due to their numerous advantages. An important challenge in deploying optical sensors is the interrogation of the sensor, that is, recovering the measured value from the sensor output.
Marco Aurelio Juca +1 more
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Resonant Fiber Bragg Grating (FBG) force/strain sensor
European Workshop on Optical Fibre Sensors (EWOFS 2023), 2023Ashkenazy Eli, Slava Krylov, Moshe Tur
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Investigation of fiber laser pulses by a fiber-Bragg-grating (FBG) spectrum analyzer
2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666), 2005We prepared two fiber-Bragg-gratings (FBG)-arrays for the wavelength range 1074 - 1100 nm, both with a spectral width of 0.1 nm and a reflectivity of about 1% of the individual gratings so that pulses are investigated from an Yb fiber laser, Q-switched by an acousto-optical modulator with a repetition rate of 2.6 kHz. Using FBG-array the development of
S. Jetschke +5 more
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