scholarly journals Distributed strain measurements using fiber Bragg gratings in small-diameter optical fiber and low-coherence reflectometry

2010 ◽  
Vol 18 (25) ◽  
pp. 26484 ◽  
Author(s):  
Dragan Coric ◽  
Marco Lai ◽  
John Botsis ◽  
Aiping Luo ◽  
Hans G. Limberger
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Gratings ◽  
Small Diameter ◽  
Bragg Gratings ◽  
Strain Measurements ◽  
Low Coherence ◽  
Distributed Strain

The novel potential for embedded strain measurements offered by micro-structured optical fiber Bragg gratings

2015 ◽  
pp. 529-535
Author(s):  
T Geernaert ◽  
S Sulejmani ◽  
C Sonnenfeld ◽  
H Thienpont ◽  
F Berghmans ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
The Novel ◽  
Strain Measurements

Optical fiber Bragg gratings Part II Modeling of finite-length gratings and grating arrays

2002 ◽  
Vol 19 (9) ◽  
pp. 1855 ◽  
Author(s):  
Vittorio M. N. Passaro ◽  
Roberto Diana ◽  
Mario N. Armenise
Keyword(s):  
Optical Fiber ◽  
Finite Length ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings

Characterization of Optical Fiber Bragg Gratings as Strain Sensors Considering Load Direction

2008 ◽  
Author(s):  
Michael C. Emmons ◽  
Sunny Karnani ◽  
K. P. Mohanchandra ◽  
Gregory P. Carman ◽  
Stefano Trono ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Strain Sensors ◽  
Great Promise ◽  
Fiber Direction ◽  
Load Direction ◽  
Isotropic Composite ◽  
Loading Direction

This study investigates the influence of lay-up and load direction on embedded optical fiber Bragg gratings (FBGs) used as strain sensors. FBGs have shown great promise for application to structural health monitoring with advantages of small size and cylindrical geometry readily allowing for embedment within fiber reinforced composites. Characterization of the embedded FBGs is necessary to develop a rugged and reliable strain sensor. This paper specifically explores the effects of loading direction on the FBG strain outputs. A well behaved baseline case is established with results for gratings loaded parallel to the optical fiber direction while embedded parallel to the adjacent structural fibers in a quasi-isotropic composite. Results and analysis are also presented for a case involving a composite fabricated with the optical and structural fibers parallel to each other but perpendicular to the loading direction. Extremely good results are obtained relating FBG strain measurements with that of surface mounted resistance strain gauges.

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