Interferometric fiber-optic gyroscopes: a summary of progress

Abstract

An overview of both open-loop and closed-loop IFOG (interferometric fiber-optic gyroscope) technologies is presented. Error sources associated with short-term random noise and long-term bias stability have been identified and properly controlled. Current research activities are focused on improving both the dynamic range and the scale factor performance for inertial navigation applications. For low- and medium-performance requirements, IFOG technology is close to the production stage. Cost and packing issues are being addressed to bring the IFOG from a laboratory instrument to a product. Progress on an attitude and heading reference system (AHRS) open-loop IFOG and an inertial-grade, closed-loop IFOG is presented, and the prospects and applications of these newly emerging technologies are discussed.<>