Nonlinear fiber gyroscope for quantum metrology
  We examine the performance of a nonlinear fiber gyroscope for improved signal detection beating the quantum limits of its linear counterparts. The performance is examined when the nonlinear gyroscope is illuminated by practical field states, such as coherent and quadrature squeezed states. This is compared with the case of more ideal probes such as photon-number states. 
Alfredo Luis, Irene Morales, \'Angel Rivas
quant-ph physics.optics