Fiber optic current sensor and method for sensing current using the same

摘要

An apparatus and method for sensing current. The apparatus includes an optical fiber (14) having first and second opposing ends, a recirculator (22) configured such that when light propagates from the respective first and second ends of the optical fiber, at least some of the light is reflected, directed or passed by the recirculator into the respective opposing ends of the optical fiber to propagate through the optical fiber and form an optical loop having an opening there through.