Abstract
A holey fiber has been developed that has an extremely low bending loss (less than 0.01dB/turn) at a bending diameter of 10mm. Six air holes around the core lower the effective cladding index and as a result those confine the signal light within the core better compared with conventional fibers. The optical characteristics, fiber-joint characteristics, and reliability of this holey fiber were investigated. An optical curl cord developed utilizing the very low bending loss of this holey fiber was found to have characteristics suitable for indoor wiring of FTTH.
