OPTICAL FIBER DEVICE AND OPTICAL BODY

摘要

This optical fiber device is provided with an optical body that is arranged between a first optical fiber body and a second optical fiber body. The optical body is provided with: an optical path part through which light transmits or passes so that light discharged from a first optical fiber is incident on a second optical fiber; and a cylindrical reflective part which is arranged on the outer circumference of the optical path part and reflects light. The outer width dimension of the second optical fiber body-side end portion of the optical path part is smaller than the outer width dimension of the core of the second optical fiber in the first surface.