Femtosecond Laser Fabricated All-Multicore-Fiber Parallel Fabry-Perot Interferometers for Dual-Parameter Sensing

Abstract

We demonstrate all-multicore-fiber parallel Fabry-Perot interferometers (FPIs) with individually variable cavity length of 26-61-µm by femtosecond laser selective micro-machining and fiber fusion splicing, leading to the successful mitigation of cross-sensitivity arising in dual-parameter sensing.