Bragg grating in novel two-core holey fiber for simultaneous measurement of pressure and temperature

A novel holey fiber with two suspended Ge-doped cores was successfully developed for simultaneous measurement of pressure and temperature. The diameters of the cores are 4.2 μm and 6 μm, with cladding diameters of 23.8 μm and 37.4 μm, respectively. Pressure sensitivities of the two-core holey fiber were measured to be -16.98 pm/MPa and -14.84 pm/MPa whereas temperature sensitivities were 12.41 pm/°C and 12.51 pm/°C.