Low Bending Loss Optical Fiber with Reduced Splice Loss

摘要

With the development of FTTH (Fiber To The Home), an optical fiber with a reduced bend radius for indoor wiring and storage is requested. SMF (Single-Mode Fiber) with a reduced bending loss using a conventional step index profile, however, shows a significant splice-loss increase. We developed a new type of a low bending loss optical fiber with splice loss suppressed employing a trench-type index profile. One of the experimental fibers, which was designed to have a minimum allowable bending radius of 7.5 mm, realized a splice loss of 0.32 dB at 1310 nm in case the fiber is spliced with a normal SMF. The splice loss is about a half of that of a conventional low bending loss SMF.