Circle-coupled resonator waveguide with enhanced Sagnac phase-sensitivity for rotation sensing

We propose a configuration of integrated waveguide structure consisting of resonators coupled to an arc-shape waveguide. We show theoretically that enhanced sensitivity is given by positive dispersion of the system, and the coupled resonators' contribution manifests itself as an enhancement of phase shift imparted by Sagnac effect. A more clearly physical analysis indicated that the enhancement is with dependence in form but in physical essence no relation on slow light property predicted in the waveguides. This optimized system is preferable compared with a conventional gyroscope. Such proposed configuration can be used to realize highly compact optical gyroscope for rotation sensing.