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Two-axis bend measurement with Bragg gratings in multicore optical fiber
G M H Flockhart1, W N MacPherson, J S Barton
1Department of Physics, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, UK. g.m.h.flockhart@hw.ac.uk
Optics Letters
|March 28, 2003
Abstract:
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.