Fabrication for Single-Mode Core Fan-in/Out Polymer Optical Waveguide using the Mosquito Method

We have developed the Mosquito method for fabricating polymer optical waveguides. By using the Mosquito method, three-dimensional array of circular cores with graded-index (GI) profile can be formed. In this paper, to realize an effective coupling element for multicore fibers (MCF) and single-mode fibers, fan-in/out polymer optical waveguides are focused. For low-loss fan-in/out waveguide, the Mosquito method is applied where the fabrication conditions are investigated to improve the optical properties in multiple cores. Furthermore, fan-in/out structure for 7-core MCF is successfully fabricated.