All‐fiber Devices Based on Photonic Crystal Fibers with Integrated Electrodes

A special kind of microstructured optical fiber was proposed and manufactured where, as well as the holey region (solid core and silica‐air cladding), the fiber has also two large holes for electrode insertion. Bi‐Sn and Au‐Sn alloys were selectively inserted in those holes forming two parallel, continuous and homogeneous internal electrodes. We demonstrated the production of a monolithic device and its use to externally control some of the guidance properties (e.g. polarization) of the fiber.