Optical fiber Fabry-Pérot sensor fabrication based on focused ion beam post-processing

A combination of focused ion beam milling and chemical etching is proposed for the creation of Fabry-Pérot cavities in microwires. Both simple cavities and cantilevers are created on 15 μm-diameter microwires and characterized in temperature. The cantilever structure shows sensitivity to vibration and is capable of measuring frequencies in the range 1 Hz – 40 kHz.