Optical fiber Fabry-Perot 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-Perot cavities in microwires. Both simple cavities and cantilevers are created on 15 ?m-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.

https://doi.org/10.1117/12.2059175