Metal-coated second-order fibre Bragg gratings produced by infrared femtosecond radiation for dual temperature and strain sensing

2016 ◽  
Author(s):  
K. Chah ◽  
D. Kinet ◽  
C. Caucheteur
Keyword(s):  
Bragg Gratings ◽  
Second Order ◽  
Strain Sensing ◽  
Femtosecond Radiation ◽  
Fibre Bragg Gratings

Characterization of fibre Bragg gratings for temperature and strain sensing

2007 ◽  
Author(s):  
Nezih Mrad ◽  
Alexei Ivanov ◽  
Jacques Albert ◽  
Gao Zhi (George) Xiao
Keyword(s):  
Bragg Gratings ◽  
Strain Sensing ◽  
Fibre Bragg Gratings

Optics-Based Strain Sensing System

2011 ◽  
Vol 700 ◽  
pp. 178-181 ◽  
Author(s):  
Kevin J. Stevens ◽  
Grant V.M. Williams ◽  
I. Monfils ◽  
D. Hirst ◽  
P. Wagner ◽  
...  
Keyword(s):  
Testing Machine ◽  
Bragg Gratings ◽  
Strain Sensors ◽  
Strain Sensing ◽  
Temperature Drift ◽  
Multiple Sensors ◽  
Sensing System ◽  
Fibre Bragg Gratings ◽  
Distributed Strain ◽  
Dynamic Strains

An optics-based strain sensing system is being developed for quazi-distributed strain sensing in locations and environments that are not accessible to conventional strain sensors. The system comprises an Optical Interrogator that has been designed and constructed by Southern Photonics [1], and optical fibre coupled Bragg grating strain sensors. It has been tested using commercial fibre Bragg gratings [2] that were attached to 2 samples of 316 grade stainless steel and cycled in strain and temperature using an Instron mechanical testing machine and temperature controlled cabinet. The results have been compared to the performance of conventional electrical resistance strain gauges. Pairs of fibre Bragg gratings were simultaneously interrogated at 1540 and 1550 nm centre wavelengths to demonstrate the ability of the system to use multiple sensors for quazi-distributed sensing and temperature compensation. The Optical Interrogator resolution is approximately 4 microstrains, accounting for longer term temperature drift, and it is capable of resolving dynamic strains at rates of up to 90 Hz.

Fibre Bragg Gratings in Harsh and Space Environments: Principles and applications

2019 ◽  
Author(s):  
Brahim Aissa ◽  
Emile I. Haddad ◽  
Roman V. Kruzelecky ◽  
Wes R. Jamroz
Keyword(s):  
Bragg Gratings ◽  
Space Environments ◽  
Fibre Bragg Gratings
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