Spatially-multiplexed fibre-optic Bragg grating strain and temperature sensor system based on interferometric wavelength-shift detection

1995 ◽  
Vol 31 (12) ◽  
pp. 1009-1010 ◽  
Author(s):  
Y.J. Rao ◽  
L. Zhang ◽  
I. Bennion ◽  
K. Kalli ◽  
G. Brady ◽  
...  
Keyword(s):  
Temperature Sensor ◽  
Sensor System ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Fibre Optic ◽  
Shift Detection

Development of Fiber Bragg Grating (FBG) as Temperature Sensor Inside Packed-bed Non-thermal Plasma Reactor

2014 ◽  
Vol 68 (3) ◽  
Author(s):  
Siti Musliha Aishah Musa ◽  
RK Raja Ibrahim ◽  
Asrul Izam Azmi
Keyword(s):  
Fiber Bragg Grating ◽  
Temperature Variation ◽  
Thermal Plasma ◽  
Temperature Sensor ◽  
Plasma Reactor ◽  
Packed Bed ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Bragg Wavelength ◽  
Non Thermal Plasma

This paper presents early work on Fiber Bragg grating (FBG) as temperature sensor to monitor temperature variation inside a packed-bed non-thermal plasma reactor. FBG made from germania-doped fiber with center Bragg wavelength of 1552.5 nm was embedded inside non-thermal plasma reactor with sphere shape dielectric bead (barium titanate) and used to probe the temperature variation inside the reactor. The experimental works have proven that FBG is a suitable sensor to monitor temperature variation inside of reactor via LabVIEW program. Besides that, Optical Spectrum Analyzer (OSA) recorded Bragg wavelength shift as voltage of power supply increases, which indicate the non-uniform temperature variation occurring inside the reactor. However, it does not affect the chemical reaction inside the reactor because the temperature condition is in steady state.

SENSITIVITY MEASUREMENT OF FIBRE BRAGG GRATING SENSOR

2016 ◽  
Vol 78 (3) ◽  
Author(s):  
Suzairi Daud ◽  
Muhammad Safwan Abd Aziz ◽  
Kashif Tufail Chaudhary ◽  
Mahdi Bahadoran ◽  
Jalil Ali
Keyword(s):  
Tunable Laser ◽  
Sensor System ◽  
Laser Source ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Fibre Bragg Grating ◽  
Sensor Head ◽  
Fibre Bragg Grating Sensor ◽  
Pass Through ◽  
Bragg Grating Sensor

A practical pass-through type fibre Bragg grating (FBG) temperature sensor system have been designed, developed, simulated, and experimentally investigated. The performance of FBG was evaluated in harsh environments exposed under direct sunlight, rain, and wind. The sensor system designed directly focused with convex and hand lens. The temperature of FBG’s sensor head been measured. The broadband laser source was launched into the system using tunable laser source (TLS) and both transmission and reflection spectra of FBG sensor were measured by optical spectrum analyzer (OSA). Results shows that the Bragg wavelength shift,  increased proportionally with the temperature changes. The sensitivity of FBG were recorded at 0.0100 and 0.0132 nm °C-1 for the systems where convex and hand lens applied to the FBG’s sensor head respectively, while the sensitivity of 0.0118 nm °C-1 measured for the system without any focusing element applied.

Dual-cavity interferometric wavelength-shift detection for in-fiber Bragg grating sensors

1996 ◽  
Vol 21 (19) ◽  
pp. 1556 ◽  
Author(s):  
Y. J. Rao ◽  
L. Zhang ◽  
I. Bennion ◽  
D. A. Jackson
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Fiber Bragg Grating Sensors ◽  
Shift Detection

Time-and-spatial-multiplexing tree topology for fiber-optic Bragg-grating sensors with interferometric wavelength-shift detection

1996 ◽  
Vol 35 (13) ◽  
pp. 2267 ◽  
Author(s):  
A. B. Lobo Ribeiro ◽  
Y. J. Rao ◽  
L. Zhang ◽  
I. Bennion ◽  
D. A. Jackson
Keyword(s):  
Fiber Optic ◽  
Spatial Multiplexing ◽  
Tree Topology ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Shift Detection
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