A multicore fibre (MCF) sensor to measure the radial deformation of a compliant cylinder under compression is
presented. The sensor is connectorised and need not be permanently bonded to the test object. A differential
measurement technique using FBGs written into the MCF makes the sensor temperature insensitive. FBG measurement
of axial strain of a cylinder under compression is also reported.
We report an accelerometer based upon a simple fibre cantilever constructed from a short length of multicore fibre
(MCF) containing fibre Bragg gratings (FBGs). Two-axis measurement is demonstrated up to 3 kHz.
We report experimental measurements of the strain and temperature sensitivity of the optical phase in a singlemode polymer optical fibre. These values were obtained by measuring optical path length change using a Mach-Zender interferometer.