Polarization-based sensor for secure fiber optic network and other security applications

摘要

A system, method, and computer program product for sensing an attempted intrusion including measuring changes in the state of polarization (SOP) of light transmitting through an optical fiber. The sensing system including a optical fiber in proximity to a secured element, and a fiber optic polarizer coupled to the optical fiber. The system may also include a transmitter, a receiver, and an electronic component for measuring changes in the state of polarization of the light transmitted through the optical fiber, wherein the light supplies information adequate to determine one or more polarization traces, an averaged trace based on the one or more polarization traces, and an intrusion trace.