scholarly journals Fiber Bragg grating modeling, simulation and characteristics with different grating lengths

2007 ◽  
Vol 3 (2) ◽  
Author(s):  
Ho Sze Phing ◽  
Jalil Ali ◽  
Rosly Abdul Rahman ◽  
Bashir Ahmed Tahir
Keyword(s):  
Fiber Bragg Grating ◽  
Matrix Method ◽  
High Performance ◽  
Fiber Bragg Grating Sensor ◽  
Critical Parameters ◽  
Bragg Grating ◽  
Fiber Gratings ◽  
Coupled Mode ◽  
High Performance Fiber ◽  
Bragg Grating Sensor

In this paper we perform a simulation of fiber Bragg grating sensor with different grating lengths. It is shown that the grating length represents as one of the critical parameters in contributing to a high performance fiber Bragg grating sensor. The simulated fiber gratings with different lengths were analyzed and designed by calculating reflection and transmission spectra, and the bandwidth. Such simulations are based on solving coupled mode equations that describe the interaction of guided modes. The coupled mode equations are solved by the Transfer Matrix Method (a fundamental matrix method).

Four years of soil strain monitoring on Etna Volcano Mount by means of a Three-axial Fiber Bragg Grating Sensor

2020 ◽  
Author(s):  
Umberto Giacomelli ◽  
Enrico Maccioni ◽  
Giorgio Carelli ◽  
Daniele Carbone ◽  
Salvatore Gambino ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
High Performance ◽  
Low Cost ◽  
High Sensitivity ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Strain Behavior ◽  
Strain Monitoring ◽  
Soil Strain ◽  
Bragg Grating Sensor

<p>Rock strains detection is one of the principal ways to monitor geohazards. Classic strainmeters are cumbersome, hard to install and very expensive. Opto-electronics devices based on fiber Bragg grating technology allow to realize strainmeters with high sensitivity, low-cost, small volume and high performance.<br>We present the long term result of continuous soil strain monitoring on the Etna mount by a three-axial fiber Bragg grating sensor. The sensor has been developed in the framework of European Project MED-SUV (MEDiterranean SUpersite Volcanos). The installation site is a 8.5 meters deep borehole at a distance of about 7 km South-West from the summit craters of the Etna mount, at an elevation of about 1740 meters. This kind of sensor has a resolution better than 100 nanostrains on a daily timescale. Despite it is only a prototype, the sensor has worked for four years with a duty-cycle higher than 90% detecting both fast event, as earthquakes, and slow event, as epochal rocks strain behavior.</p>

CCD fiber Bragg grating sensor demodulation system based on FPGA

2010 ◽  
Author(s):  
Q. Zhou ◽  
T. G. Ning ◽  
L. Pei ◽  
J. Li ◽  
X. D. Wen ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Bragg Grating Sensor
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