Title :
Transverse-Stress Fiber Bragg Grating Sensor With High Spatial Resolution and Temperature Stability
Author :
Espejo, R. Joseph ; Dyer, Shellee D.
Author_Institution :
Nat. Inst. of Standards & Technol., Boulder
fDate :
7/1/2007 12:00:00 AM
Abstract :
We demonstrate a new method for measuring transverse stress with 10.2-mum spatial resolution in a fiber Bragg grating sensor, without the use of polarization-maintaining fiber, by combining a four-state polarization analysis with a layer-peeling algorithm. Measurements of the externally induced birefringence agree well with predicted values. We also demonstrate that our measurement is insensitive to temperature changes and spatial gradients, making it ideal for nonisothermal applications.
Keywords :
Bragg gratings; fibre optic sensors; light interferometry; strain sensors; stress measurement; fiber Bragg grating sensor; four state polarization analysis; high spatial resolution; layer peeling algorithm; low coherence interferometry; nonisothermal applications; polarization maintaining fiber; size 10.2 mum; temperature stability; transverse stress; Bragg gratings; Capacitive sensors; Fiber gratings; Optical fiber polarization; Optical fiber sensors; Spatial resolution; Stability; Strain measurement; Stress measurement; Temperature sensors; Fiber Bragg gratings (FBGs); fiber-optic sensors; layer peeling; low-coherence interferometry (LCI); transverse-strain sensors;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2007.897718
