Resumen: We present a study of the feasibility of transforming the multicore fiber in a supermode-interference based bending sensor into an active stage. By compensating the antisymmetric supermode losses for high curvatures, fringe visibility is improved and the sensor operating range can be extended. For a given multicore fibre length and Er3+-ion concentration sensor calibration curves allow assessing the bending radius by measuring the visibility as a function of the input pump power. The Er3+-ion concentration, available input pump power and multicore fiber length set the minimum bending radius that could be measured. Idioma: Inglés DOI: 10.1016/j.optmat.2018.06.002 Año: 2018 Publicado en: OPTICAL MATERIALS 87 (2018), 53-57 ISSN: 0925-3467 Factor impacto JCR: 2.687 (2018) Categ. JCR: OPTICS rank: 34 / 95 = 0.358 (2018) - Q2 - T2 Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 120 / 293 = 0.41 (2018) - Q2 - T2 Factor impacto SCIMAGO: 0.59 - Atomic and Molecular Physics, and Optics (Q1) - Electronic, Optical and Magnetic Materials (Q1) - Electrical and Electronic Engineering (Q1) - Computer Science (miscellaneous) (Q1)