Ourclosedloopfiberopticgyroscopes(FOGs)are-solid-statedeviceswhichofferacombinationlonglifeandhighreliabilityalongwiththepotentialoflowmass-productioncost.thefundamentalprincipleisbasedonSagnaceffect.OurFOGshaveso-calledminimunconfigurationthatprovidesreciprocalopticalpathsfortwobeamscounter-propagatinginafiberloop.