Two-axis bend measurement with Bragg gratings in multicore optical fiber.
We describe what is to our knowledge the first use of fiber Bragg gratings written into three separate cores of a multicore fiber for two-axis curvature measurement. The gratings act as independent, but isothermal, fiber strain gauges for which local curvature determines the difference in strain between cores, permitting temperature-independent bend measurement.
Flockhart
G M H
GM
Department of Physics, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, UK. g.m.h.flockhart@hw.ac.uk
MacPherson
W N
WN
Barton
J S
JS
Jones
J D C
JD
Zhang
L
L
Bennion
I
I