scholarly journals High Sensitive FBG Based Muscular Strain Sensor

2017 ◽  
Vol 6 (2) ◽  
pp. 71 ◽  
Author(s):  
R. D. Koozekanani ◽  
S. Makouei
Keyword(s):  
Fiber Bragg Grating ◽  
Axial Strain ◽  
Strain Sensor ◽  
Single Mode ◽  
Bone Diseases ◽  
Bragg Grating ◽  
Biomechanical Behavior ◽  
Musculoskeletal Structure ◽  
The One ◽  
Bragg Grating Sensor

Assessment of biomechanical behavior of human musculoskeletal structure is essential to recognize bone diseases and to design proper medical devices.  The skeleton system basically adapts to mechanical loadings. Thus, monitoring the bone deformation under load is of great importance to attain better analysis and interpretation.  In recent years, Fiber Bragg Grating sensing devices have been developed and used to monitor strain and temperature of skeleton system.  In this work a Fiber Bragg Grating sensor is designed holding a 1.54 pmµε-1 axial strain sensitivity which is almost 30% higher than the one achieved so far.  The improvement in sensitivity is achieved by adjusting single-mode optical fiber parameters of the structure.

Numerical Analysis of the Hybrid Photonic Crystal Fiber and Single Mode Fiber/Fiber Bragg Grating Sensor for Simultaneous Measurement of Temperature and Strain

2019 ◽  
Vol 16 (2) ◽  
pp. 329-334 ◽  
Author(s):  
Fabio Barros de Sousa ◽  
Fiterlinge Martins de Sousa ◽  
Jorge Everaldo de Oliveira ◽  
Lelis Araujo de Oliveira ◽  
Fabricio Pinho da Luz ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Fiber Bragg Grating ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Bragg Grating ◽  
Bragg Wavelength ◽  
Crystal Fiber ◽  
Power Peak ◽  
Bragg Grating Sensor

In this paper we investigate the performance of a Fiber Bragg Grating (FBG) as a strain-optic and temperature sensor, using the Coupled Mode Theory (CMT) and the Transfer Matrix Method (TMM), through numerical simulation in an interrogation system with Single-Mode Fiber (SMF) and Photonic Crystal Fiber (PCF). Parameters such as sensitivity, bandwidth, peak power, peak wavelength and side-lobes power, were analyzed through the Bragg wavelength change depending on the simultaneous variation of strain and temperature. The FBG sensor proposed suffered thermal variation 25 °C to 200 °C and of strain of 0 μs to 1000 μs, excellent linearity was obtained for the variation of the Bragg wavelength with differences of 0.7 nm for each 50 °C and 0.245 nm for each 200.

Filament-Based Fabrication and Performance Analysis of Fiber Bragg Grating Sensors Using Ultrashort Pulse Laser

2014 ◽  
Vol 2 (2) ◽  
Author(s):  
Farid Ahmed ◽  
Martin B. G. Jun
Keyword(s):  
Refractive Index ◽  
Performance Analysis ◽  
Fiber Bragg Grating ◽  
Contact Force ◽  
Ultrashort Pulse ◽  
Axial Strain ◽  
Single Mode ◽  
Force Sensor ◽  
Bragg Grating ◽  
Refractive Index Modulation

The method of ultrashort pulse filamentation induced refractive index modification is employed to inscribe fiber Bragg grating (FBG) in single-mode optical fiber (SMF). Line-by-line index inscription technique is used to write refractive index modulation in the core of SMF. The proposed pulse filamentation based index modification enables controlled and flexible writing of FBGs in optical fibers. Performance analysis of the fabricated FBG has been carried out for temperature, contact force, pressure, and axial strain sensing. The in-fiber FBG exhibits sensing performance very similar to FBGs commercially available to date. Then, the written FBG is engineered to demonstrate highly sensitive contact force sensor.

Spring-Steel Pipe Fiber Bragg Grating Strain Sensor

2014 ◽  
Vol 620 ◽  
pp. 233-237
Author(s):  
Li Peng ◽  
Chuan Li ◽  
Zhen Gang Zhao ◽  
Sheng Wu ◽  
Ying Na Li
Keyword(s):  
Fiber Bragg Grating ◽  
Axial Strain ◽  
Strain Sensor ◽  
Optical Loss ◽  
Spring Steel ◽  
Steel Pipe ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Repeatability Error ◽  
The Stability

Structure’s strain reflects the stability of the project, the excessive structural strain will destroy the stability of the structure. Fiber Bragg Grating has many features, such as, strong anti-interference ability, low optical loss, and it can be used for a long time in the project, etc. Base on the features, the Fiber Bragg Grating Strain Sensor can be used in slope and other projects for the long-term monitoring. In this paper, we develop a Fiber Bragg Grating Strain Sensor based on the spring-steel pipe, FBG be fixed to the inner of the steel pipe by epoxy glue, it is protected by a stainless steel pipe outside, the Flange be fixed to the both side of the spring-steel pipe. When the tension acting one the flanges, the spring-steel pipe occurs an axial strain, this axial strain makes the center wavelength of the Fiber Bragg Grating change, measuring the wavelength shift amount of the Fiber Bragg Grating can calculate the strain. The loading experiment indicates that the sensitivity of the Spring-steel pipe Fiber Bragg Grating Strain Sensor is 0.81pm/με, the linearity of the sensor is 2.1%FS, and the repeatability error of the sensor is 2.29%FS.

Fiber Bragg grating sensor system using single-mode wavelength swept light source

2011 ◽  
Author(s):  
Takanori Saitoh ◽  
Kenichi Nakamura ◽  
Hiroshi Furukawa ◽  
Masaru Koshihara
Keyword(s):  
Fiber Bragg Grating ◽  
Light Source ◽  
Single Mode ◽  
Fiber Bragg Grating Sensor ◽  
Sensor System ◽  
Bragg Grating ◽  
Bragg Grating Sensor
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