Supersensitive sensors based on multicore optical fibres

摘要: In this work, we demonstrate the use of particularly characterised multicore optical fibres (MCFs) to devise compact, compellingly simple, ultrasensitive interferometric sensors which are capable sensing single or multiple physical parameters. Generally, our devices operate in reflection mode and consist a few centimetres MCF fusion spliced standard single-mode fibre (SMF). The tools instrumentation needed fabricate conventional cleaver splicing machine. We highly-sensitive bending sensor (inclinometer) with three strongly coupled cores is distinguishing inclination orientations, also force based on seven cores. both cases interrogated low-power LED miniature spectrum analyser. Bending induces drastic changes supermodes, their excitation, consequently, reflected (interference pattern).