Single-mode fiber design proposal using evolutionary technique with ultra low bending-loss appropriate in FTTH application

A proposal for the new single mode optical fiber containing four cladding layer with ultra low bending loss is presented. The suggested design method is based on the Genetic Algorithm optimization technique. Compared to the work reported in [1], our designed structure exhibits very small bending loss over the wide communication band (1.3–1.65 μm). Simulation results show bending loss of 6.78e−14 dB/turn at 1.55 μm for single turn of 5 mm radius. The best value reported in [1] was 2e−3 dB/turn for the same wavelength and radius of curvature.