Abstract
In this article, with sophisticated modification on modal field distribution and introducing a new design procedure, a single-mode fiber with ultra-low bending loss and large effective area (Aeff) that is appropriate for a fiber-to-the-home operation is presented. The bending loss optimization procedure is based on the genetic algorithm. The most remarkable feature of this methodology is designing a bend-insensitive fiber without reduction of core radius and mode field diameter. The designed structure exhibits very small bending loss and large Aeff simultaneously. Simulation results show bending loss of 2.7 × 10−3 dB at 1.55 μm for a single turn of 5-mm radius. The calculated mode field diameter and Aeff for the designed structure are 9.00 μm and 63.62 μm2, respectively.
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