Transverse load and orientation measurement with multicore fiber Bragg gratings.
We demonstrate the sensitivity of Bragg gratings in a multicore fiber to transverse load. The Bragg peaks are split because of stress-induced birefringence, the magnitude of which depends upon the load and grating position relative to the load axis. Experiments show that a set of gratings in a four-core fiber can measure a load axis angle to +/- 5 degrees and a load magnitude to +/- 15 N m(-1) up to 2500 N m(-1). We consider alternative designs of multicore fiber for optimal load sensing and compare experimental and modeled data.
Silva-López
Manuel
M
Applied Optics and Photonics Group, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
MacPherson
William N
WN
Li
Cheng
C
Moore
Andrew J
AJ
Barton
James S
JS
Jones
Julian D C
JD
Zhao
Donghui
D
Zhang
Lin
L
Bennion
Ian
I