title: All-fiber low-loss connector for accessing both close cores of twin-core fiber.
abstract: A novel all-fiber connector is proposed for connecting each core of a twin-core fiber (TCF) to a single-core fiber (SCF) core simultaneously and accessing independently the both close cores of the TCF. The connector is mainly composed of two cascaded pieces of collinear four-core fiber (CFCF). The two close optical fields launched from the TCF are separated into two far apart optical fields, so that each optical field could be butt-coupled into one of the cores of one gemini fiber segment, which has two single-mode SCF pigtails. For the simulated example, the center distance of the two optical fields is increased from 16 μm to more than 90 μm, the cross-talk is -37 dB, and the power loss is 0.056 dB. The feasibility of the strategy is partially demonstrated experimentally by fabricating a CFCF by groove & stack & draw method and one gemini fiber segment with pigtails by flame-brushing technology.
authors.affiliation: Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, 100044, China.
authors.forename: Ruifeng
authors.initials: R
authors.lastname: Zhao
authors.forename: Li
authors.initials: L
authors.lastname: Pei
authors.forename: Tigang
authors.initials: T
authors.lastname: Ning
authors.forename: Song
authors.initials: S
authors.lastname: Gao
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005240:Feasibility Studies; D008962:Models, Theoretical; D055100:Optical Fibers