Patent ID: 8774587
Filing Date: 2014-07-08
Classification: G02B

Abstract:
1. A stress control structure including one or more optical fibers adapted to be placed in a region or regions of high stress electrical field, the stress control structure comprising: a longitudinal structure that is centrally located and provides support for the stress control structure, and is electrically insulative at the highest voltage the device is designed for or having a higher dielectric constant; wherein said longitudinal structure is within a high stress electrical field at least, at or near, or within one end and thereby has created therein the high stress electrical field; one or more electric field stress control layers comprised of a high permittivity rubber or other high permittivity, flexible, conformable, insulative material, tightly-fitted around at least a portion of the length of the longitudinal structure, and creating a reduction along the longitudinal structure from the high stress electrical field down to a lower stress electrical field or zero stress electrical field; the one or more optical fibers extending at least from the high stress electrical field to the lower stress electrical field or zero stress electrical field, and disposed against the one or more stress control layers; one or more layers of conformable, dielectric material, covering at least the one or more optical fibers; and wherein the one or more optical fibers are contained tightly between the layer of conformable dielectric material and the one or more conformable electric field stress control layers.