Simultaneous measurement of bending and temperature based on a single sampled chirped fiber Bragg grating embedded on a flexible cantilever beam

2006 ◽  
Vol 31 (19) ◽  
pp. 2839 ◽  
Author(s):  
Young-Geun Han ◽  
Xinyong Dong ◽  
J. H. Lee ◽  
S. B. Lee
Keyword(s):  
Fiber Bragg Grating ◽  
Cantilever Beam ◽  
Simultaneous Measurement ◽  
Bragg Grating ◽  
Chirped Fiber Bragg Grating

scholarly journals Simultaneous Measurement of Temperature and Strain Based on Peak Power Changes and Wavelength Shift Using Only One Uniform Fiber Bragg Grating

2021 ◽  
Author(s):  
abdollah malakzadeh ◽  
mohsen mansoursamaei ◽  
Rasoul Pashaie
Keyword(s):  
Fiber Bragg Grating ◽  
Cantilever Beam ◽  
Simultaneous Measurement ◽  
Strain Distribution ◽  
Peak Power ◽  
Quadratic Function ◽  
Uniform Strain ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Bragg Wavelength

Abstract Many efforts have been devoted to simultaneous measurements of strain and temperature by FBG sensors and several improving techniques have been resulted and implemented on the measurement. Most of them are based on two or more FBGs configurations or a single non-uniform FBG implementation. We propose simultaneous measurement of temperature and strain based on peak power changes and Bragg wavelength shifts using only one uniform fiber Bragg grating (FBG). We placed a ramp with the angle of θ, similar to a tilted cantilever beam, on an assumptive structure and stuck a uniform FBG on it. When a uniform strain applied to a structure, the cantilever beam converts it to a non-uniform strain distribution along with itself and consequently the uniform FBG. By creating this non-uniform strain distribution, the peak power of the reflection spectrum of the FBG will be sensitive to strain changes. In addition, the Bragg wavelength shift will be sensitive to both temperature and strain parameters. According to our simulation, temperature sensitivity of 14.15 pm/℃ is obtained for FBG sensor without any changes in the peak power. The strain sensitivity of 0.7837 pm/µε, and a nonlinear sensitivity according to a quadratic function for peak power variation are also observed.

Channel-switching add/drop multiplexer with tunable fiber Bragg grating based on the cantilever beam

2000 ◽  
Author(s):  
Dejun Feng ◽  
Heliang Liu ◽  
Weigang Zhang ◽  
Chunfeng Ge ◽  
Guiyun Kai ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Cantilever Beam ◽  
Bragg Grating ◽  
Channel Switching
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