Investigation of the dynamic demodulation ability of a tilted fiber Bragg grating filter in an all-fiber displacement sensing system
Journal
Sensors and Actuators A: Physical
Journal Volume
168
Journal Issue
1
Start Page
179
End Page
186
ISSN
09244247
Date Issued
2011
Author(s)
Abstract
This paper investigates the dynamic detecting ability of a tilted fiber Bragg grating (TFBG)-based intensity modulation technique in an all-fiber displacement sensing system. The bandwidth of the spectrum of the TFBG is controlled via the fabrication process to obtain larger dynamic detecting range and high sensitivity. We demonstrate the dynamic demodulation ability of the TFBG by measuring the transient wave propagation on a square aluminum solid with an out-of-plane point-wise fiber Bragg grating (FBG) displacement sensor. The measurement sensitivity and the sensing range of the TFBG filter-based demodulation technique is compared with that based on an FBG filter. The accuracy of measurement for transient responses of particle motions measured by the FBG displacement sensor is verified by a laser Doppler vibrometer (LDV) simultaneously. The proposed TFBG filter-based displacement sensing system is proved to be able to measure transient point-wise displacement responses with high sensitivities. Unlike other traditional fiber grating filters, the desired demodulation range and sensitivity for the TFBG filter can be controlled via the fabrication process.
Subjects
Demodulation
Displacement Sensor
Tilted Fiber Bragg Grating Filter
Transient Response
All Fiber
Demodulation Range
Demodulation Techniques
Detecting Ability
Detecting Range
Displacement Response
Displacement Sensing
Displacement Sensor
Fabrication Process
Fiber Bragg Grating (fbg)
Fiber-grating Filters
Filter-based
High Sensitivity
Intensity Modulations
Laser Doppler Vibrometers
Measurement Sensitivity
Out-of-plane
Particle Motions
Sensing Ranges
Tilted Fiber Bragg Grating
Tilted Fiber Bragg Grating Filter
Transient Response
Transient Wave Propagation
Demodulation
Fiber Bragg Gratings
Fiber Optic Components
Fiber Optic Sensors
Laser Doppler Velocimeters
Modulation
Optical Variables Measurement
Process Control
Sensors
Textiles
Transient Analysis
Wave Propagation
Fibers
SDGs
Type
journal article