Yoon, Min-Seok Lee, Sang-Bae Han, Young-Geun 2024-01-20T06:33:21Z 2024-01-20T06:33:21Z 2021-09-05 2015-07-13 1094-4087 https://pubs.kist.re.kr/handle/201004/125231 An in-line interferometer based on the intermodal coupling of a multicore fiber (MCF) is proposed and experimentally demonstrated. The in-line interferometer is fabricated by adiabatically tapering the MCF. The intermodal coupling of the in-line interferometer is strongly affected by the waist diameter of the MCF, which changes the evanescent field and the pitch size. The effect of the waist diameters of the MCF on the intermodal coupling in the in-line interferometer is theoretically and experimentally investigated. The transmission oscillations of the multiple core modes resulting from the intermodal coupling and interference substantially become stronger as the waist diameter decreases. The extinction ratio and the oscillation periodicity of the transmissions oscillations are changed by the waist diameter. (C) 2015 Optical Society of America English OPTICAL SOC AMER OPTICAL-FIBERS SENSORS In-line interferometer based on intermodal coupling of a multicore fiber Article 10.1364/OE.23.018316 1 OPTICS EXPRESS, v.23, no.14, pp.18316 - 18322 OPTICS EXPRESS 23 14 18316 18322 scie scopus 000361033900062 2-s2.0-84957566099 Optics Optics Article OPTICAL-FIBERS SENSORS Fiber optics fiber design & fabrication fiber optic components fiber optic sensor