A Novel Method for Evaluating Micro-Bending Sensitivity to Ensure Applicability to High-Density Optical Fiber Cable

In this paper, we propose a novel 3-layer wrapping method for evaluating the micro-bending sensitivity. We can ensure applicability to high-density cable because it can reproduce equivalent micro-bending in high-density cable. Furthermore, the method can be applied to arbitral optical fiber with different refractive index profile, cladding diameter, and coating property. We describe the model of optical loss in high-density cable associated with lateral pressure and contact area of optical fiber in high-density cable. After that, we experimentally and numerically confirm that the method can simulate lateral pressure in high-density cables by comparing lateral pressure distribution. We also numerically and experimentally investigate the relation between the parameters of the method: winding diameter and tension and the lateral pressure of high-density cable. Moreover, we evaluated the applicability of high-density cable for fiber with a reduced coating diameter and multi-core fiber with a standard coating diameter.