Possibility of relative position sensing by using double phase-conjugate resonators

Abstract We propose and analyze the possibility of using double phase-conjugate resonators as linear relative-position sensors. Such position sensors are linear analogs to ring laser gyros, but require optical phase conjugation for their operation. In principle,a position sensor as proposed allows measurement of the linear position of a platform relative to an inertial frame in which an optical standing wave has been established. The relative position sensing is based on the inertial nature of the electromagnetic radiation.