High sensitivity evanescent field Bragg grating sensor

Author(s):  
A.N. Chryssis ◽  
S.M. Lee ◽  
M. Dagenais
2005 ◽  
Vol 17 (6) ◽  
pp. 1253-1255 ◽  
Author(s):  
A.N. Chryssis ◽  
S.M. Lee ◽  
S.B. Lee ◽  
S.S. Saini ◽  
M. Dagenais

2020 ◽  
Author(s):  
Umberto Giacomelli ◽  
Enrico Maccioni ◽  
Giorgio Carelli ◽  
Daniele Carbone ◽  
Salvatore Gambino ◽  
...  

<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>


1994 ◽  
Vol 12 (4) ◽  
pp. 700-703 ◽  
Author(s):  
G.A. Ball ◽  
W.W. Morey ◽  
P.K. Cheo

2011 ◽  
Vol 36 (12) ◽  
pp. 2233 ◽  
Author(s):  
Pengfei Wang ◽  
Gilberto Brambilla ◽  
Ming Ding ◽  
Yuliya Semenova ◽  
Qiang Wu ◽  
...  

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