An improved 1 × N single-mode optical fiber and multi-core optical fiber coupler and preparation method

摘要

#$%^&*AU2020100483A420200521.pdf#####ABSTRACT This invention provides an improved 1 x N single-mode optical fiber and multi-core optical fiber coupler and preparation method. Its characteristics are: it consists of single-mode optical fiber, multi-core optical fiber, and the adiabatic conversion cone between the single-mode optical fiber and the multi-core optical fiber. In the composition, the adiabatic conversion cone is formed by inserting a multi-core optical fiber into a low refractive index inner layered quartz capillary tube and tapered at a high temperature. After the tapering process, the multi-core optical fiber will slowly degenerate into a new core, the light field transmitted in the core of the multi-core optical fiber can be adiabatically converted to the new core for transmission, and it is highly efficiently coupled with the single-mode optical fiber. The invention can be used for optical path coupling connection of any multi-core optical fiber.(D I ~ I t 'N II Mtl lil Ii q: iiitj