Two-channel fiber Bragg-grating strain sensor with high-resolution interferometric wavelength-shift detection

1993 ◽  
Author(s):  
Alan D. Kersey ◽  
Timothy A. Berkoff ◽  
William W. Morey
Keyword(s):  
High Resolution ◽  
Fiber Bragg Grating ◽  
Strain Sensor ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Shift Detection

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

Wavelength Shift Detection Methods Based on Cross-Correlation Analysis for Signal Demodulation of Fiber Bragg Grating Sensing System

2012 ◽  
Vol 239-240 ◽  
pp. 156-162
Author(s):  
Fan Yang ◽  
Biao Wei
Keyword(s):  
Correlation Analysis ◽  
Fiber Bragg Grating ◽  
Cross Correlation ◽  
Absolute Error ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Sensing System ◽  
Cross Correlation Analysis ◽  
Signal Demodulation ◽  
Shift Detection

In order to improve the signal demodulation performance of fiber Bragg grating (FBG) sensing system, a wavelength shift detection method based on cross-correlation analysis is proposed to improve the accuracy of the measurement. The simulation results indicate that the absolute error of the measurement can be between 2 pm - 3 pm within the range of SNR of 14 dB-7 dB. Under the condition with high SNR, the absolute error can be approximately reduced to 0.5 pm. Hence, this demodulation algorithm can reduce the influences of the noises effectively and help to further study the features of the FBG sensor demodulation system.

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