Micro-cap on 2-Core-Fiber Facet Hybrid Interferometer for Dual-Parameter Sensing

In this article, we demonstrate a “Fabry-Perot + Michelson” hybrid interferometer based on a polymer micro-cap located on asymmetric 2-core fiber (2CF) facet. Because the polymer micro-cap comprises a flat reflector and a concave reflector, the light propagating in the centric core will be reflected twice forming Fabry-Perot interference. Due to the bias angle between the eccentric core and the co...