Sensitivity analysis of a square shape apodize fibre Bragg grating chemical sensor assisted by high refractive index bi-directional coupler on both sides

2020 ◽  
Author(s):  
Sanjeev Kumar Raghuwanshi ◽  
Yadvendra Singh ◽  
Azhar Shadab ◽  
Purnendu Shekhar Pandey
Keyword(s):  
Sensitivity Analysis ◽  
Refractive Index ◽  
Directional Coupler ◽  
Chemical Sensor ◽  
High Refractive Index ◽  
Bragg Grating ◽  
Fibre Bragg Grating

Apodized fibre Bragg grating with modulated refractive index change for transmissive gain equalization

Optik ◽  
2011 ◽  
Vol 122 (17) ◽  
pp. 1569-1571
Author(s):  
M.R. Mokhtar ◽  
E.S.A. Rahman ◽  
M. Ibsen ◽  
H.A. Abdul Rashid ◽  
H.Y. Wong ◽  
...  
Keyword(s):  
Refractive Index ◽  
Refractive Index Change ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Index Change ◽  
Gain Equalization

scholarly journals Simulation of Fibre Bragg Grating as Strain Sensor for Property Intrusion

2021 ◽  
Vol 9 (12) ◽  
pp. 1862-1868
Author(s):  
Muhammad Arif Bin Jalil
Keyword(s):  
Refractive Index ◽  
Strain Sensor ◽  
Ground Vibration ◽  
High Sensitivity ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Spectral Reflectivity ◽  
Sensing Technology ◽  
Safety Property ◽  
Sensor Strain

Abstract: This study will demonstrate a strain sensor based on the optical Fibre Bragg Grating (FBG) sensing technology as it is known to have stable and reliable wavelength and response as function of the applied strain. This kind of sensor can perform accurate measurements of small ground vibration and monitor seismic activity thanks to their high sensitivity to dynamic strains induced by acceleration variation which can use to prevent property intrusion or burglary. To understand the FBG sensor more, few of its characteristics such as strain, spectral reflectivity and bandwidth and their connection with the fibre grating length and refractive index is being studied. Keywords: Fibre Bragg Grating(FBG); strain sensor; strain; spectral reflectivity; bandwidth; fibre grating length; refractive index; safety; property intrusion.

Chemical Sensors Based on Fiber Bragg Grating

2011 ◽  
Vol 84-85 ◽  
pp. 582-585 ◽  
Author(s):  
Ming Fu Zhao ◽  
De Yi Huang ◽  
Bin Zhou ◽  
Lei Zi Jiao
Keyword(s):  
Refractive Index ◽  
Fiber Bragg Grating ◽  
Chemical Sensor ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Bragg Wavelength ◽  
Chemical Substances ◽  
Fbg Sensor ◽  
Surrounding Refractive Index ◽  
The Relationship

In this paper, measurement method for the refractive index of chemical substances based on fiber Bragg grating (FBG) sensor was proposed. The relation between Bragg wavelength shift and surrounding refractive index (SRI) was analyzed theoretically and experimentally. The SRI sensitivity of the chemical sensor could be enhanced by reducing the cladding thickness of the FBG using hydrofluoric acid (HF) solution etching process. The experimental results indicated that the variation of Bragg wavelength increased as the SRI increased. In the low SRI region, the relationship between the Bragg wavelength shift and the change of the SRI was approximately linear.

scholarly journals Surrounding refractive index and liquid based sensors using fibre bragg grating

2020 ◽  
Vol 1484 ◽  
pp. 012009
Author(s):  
Nurul Shuhada Tan Halid ◽  
Suzairi Daud ◽  
Siti Nur Aizatti Rohizad ◽  
Esmafatinsyafiqa Multar ◽  
Abdull Rahim Mohd Yusoff
Keyword(s):  
Refractive Index ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Surrounding Refractive Index

scholarly journals Tilted-fibre-Bragg-grating-based 800nm WDM interrogation system for strain, temperature, and refractive index sensing

2007 ◽  
Author(s):  
Rui Suo ◽  
Xianfeng Chen ◽  
Kaiming Zhou ◽  
Lin Zhang ◽  
Ian Bennion ◽  
...  
Keyword(s):  
Refractive Index ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Refractive Index Sensing
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