title: Guided-mode-leaky-mode-guided-mode fiber structure and its application to high refractive index sensing.
abstract: We propose a fiber structure based on a single-mode-multimode-single-mode one. A theoretical analysis model based on leaky mode expansion along with a new concept of leaky mode interference is presented to facilitate and enlighten the analysis for the leaky structure. Then we focus on transmission characteristics of the structure in response to surrounding refractive indices (RI) that are higher than that of the silica fiber. In our simulation, output intensity of the structure increases monotonically for RI from 1.46 to 1.55, and changes over 2.0 dB for a change of 0.01 in RI range from 1.46 to 1.48, which is well verified by the following experiments.
authors.affiliation: Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, Anhui, China. yanglil@ustc.edu.cn
authors.forename: Li
authors.initials: L
authors.lastname: Yang
authors.forename: Linlin
authors.initials: L
authors.lastname: Xue
authors.forename: Di
authors.initials: D
authors.lastname: Che
authors.forename: Jingren
authors.initials: J
authors.lastname: Qian