Results 21 to 30 of about 1,333 (177)

High-speed, solid state, interferometric interrogator and multiplexer for fiber Bragg grating sensors [PDF]

, 2011
We report on the design and prototyping of a robust high-speed interferometric multiplexer and interrogator for fiber Bragg grating sensors. The scheme is based on the combination of active WDM channel switching and passive, instantaneous interferometry,
Niewczas, Pawel, P. Orr, Orr, Philip, P. Niewczas   +3 more
core   +1 more source

Optical fiber sensing based on reflection laser spectroscopy [PDF]

, 2010
An overview on high-resolution and fast interrogation of optical-fiber sensors relying on laser reflection spectroscopy is given. Fiber Bragg-gratings (FBGs) and FBG resonators built in fibers of different types are used for strain, temperature and ...
De Natale, Paolo, Ralph P. Tatam, Chow, Jong H., Jong H. Chow, Mario Salza, Ballard, Nicholas, Gangopadhyay, Tarun, Paz-Soldan, Daniel, Tatam, Ralph, Ferarro, Pietro, Lam, Timothy T. -Y., Lam, Timothy T-Y, Gianluca Gagliardi, Barnes, Jack A., Daniel Paz-Soldan, Gangopadhyay, Tarun Kumar, Tatam, Ralph P., Chow, Jong, Pietro Ferraro, Tarun K. Gangopadhyay, Jack A. Barnes, Loock, Hans-Peter, Edmond Chehura, Paolo De Natale, Gangopadhyay, Tarun K., Salza, Mario, Ferraro, Pietro, Hans-Peter Loock, Nicholas Ballard, Barnes, Jack, Chehura, Edmon, Gagliardi, Gianluca, Timothy T.-Y. Lam, Lam, Timothy, Chehura, Edmond   +34 more
core   +1 more source

The Impact of Rayleigh Scattering in UWFBG Array-Based Φ-OTDR and Its Suppression Method

Sensors, 2023
Ultra-weak fiber Bragg grating (UWFBG) array-based phase-sensitive optical time-domain reflectometry (Φ-OTDR) utilizes the interference interaction between the reference light and the reflected light from the broadband gratings for sensing.
Feng Wang, Yong Yu, Rui Hong, Ruifeng Tian, Yixin Zhang, Xuping Zhang   +5 more
doaj   +1 more source

Comparative analysis of the DFB fiber laser and fiber-optic interferometric strain sensors [PDF]

, 2007
The DFB fiber laser strain sensor is shown to provide an improvement in the minimum detectable length change by a factor of 275 at 2 kHz for an applied strain when compared with an interferometric sensor interrogated by at equivalent DFB laser.
C. K. Kirkendall, G. M. H. Flockhart, Kirkendall, C. K., Cranch, G. A., G. A. Cranch, Flockhart, G. M. H.   +5 more
core   +1 more source

Airborne Distributed Position and Orientation System Transfer Alignment Method Based on Fiber Bragg Grating

Sensors, 2020
With the demand for high resolution remote sensing, load array technology has gradually become an effective measure to improve imaging resolution. However, the external flow and internal engine vibration disturbance may lead to the flexible deformation ...
Wen Ye, Bin Gu, Yun Wang
doaj   +1 more source

Encrypted optical fiber tag based on encoded fiber Bragg grating array

International Journal of Extreme Manufacturing, 2023
Optical fibers are typically used in telecommunications services for data transmission, where the use of fiber tags is essential to distinguish between the different transmission fibers or channels and thus ensure the working functionality of the ...
Zhihao Cai, Bozhe Li, Zhiyong Bai, Dejun Liu, Kaiming Yang, Bonan Liu, Cong Zhao, Mengqiang Zou, Jie Zhou, Shangben Jiang, Jingyi Huang, Li Liu, Xuming Zhang, Junle Qu, Yiping Wang, Changrui Liao   +15 more
doaj   +1 more source

Thin bonding wires temperature measurement using optical fiber sensors [PDF]

, 2011
In this work we demonstrate the use of optical fiber sensors to measure temperature in thin metallic bonding wires. Temperature was measured in copper wires with diameter of 0.10, 0.28, 0.60 and 0.70 mm and for different values of the driven electrical ...
P. Antunes, Varum, Humberto, P.S. André, Varum, H., Andre, Paulo, Lima, Hugo, Rocha, A. M., H. Lima, A.M. Rocha, Rocha, Ana, Lima, H., Antunes, P., Antunes, Paulo, H. Varum, André, P. S.   +14 more
core   +2 more sources

Coupled-core fiber Bragg gratings for low-cost sensing [PDF]

, 2022
[EN] Sensors based on Bragg gratings inscribed in conventional single mode fibers are expensive due to the need of a sophisticated, but low-speed, interrogation system.
Villatoro, Joel, Madrigal-Madrigal, Javier, Flores-Bravo, Jose A., Zubia, Joseba, Sales Maicas, Salvador   +4 more
core   +1 more source

High-speed interferometric FBG interrogator with dynamic and absolute wavelength measurement capability [PDF]

, 2013
A passive, interferometric wavelength demodulation technique has been extended to measure the absolute wavelengths of a multiplexed array of fiber Bragg grating sensors. The scheme retains its original strain resolution of 10 nε/√{Hz}. A proof-of-concept
Perry, Marcus, Niewczas, Pawel, Johnston, Michael, Orr, Philip   +3 more
core   +1 more source

Pseudo-heterodyne signal processing scheme for interrogation of fiber Bragg grating sensor arrays [PDF]

, 1998
An intensity-based interrogation technique for arrays of fiber bragg grating (FBG) sensors is reported. The technique is based upon each FBG forming one mirror of a Michelson interferometer.
Clare K. Chatterjea, Chatterjea, C. K., Ralph P. Tatam, Tatam, Ralph P., James, Stephen W., Stephen W. James   +5 more
core   +1 more source