Larger systems, or systems that stack up additional gyros to compare measurements can improve performance further. A fiber-optic gyroscope, or FOG, works using the Sagnac effect, just like a ring ...

By introducing a technique for eliminating noise, Hajimiri and his colleagues were able to create an optical gyroscope that was one–five hundredth the size of commercially available fiber-optic ...

as well as a Fiber Optic Gyroscope (FOG) from an unknown missile, though possibly from the Tornado family of MRLSes. The latter uses the Sagnac effect to detect the phase shift between two laser ...