RAMAN AND BRILLOUIN COUPLERS WITH PHASE MISMATCH

Statistical properties of optical fields in asymmetric nonlinear coupl ers composed of two waveguides are investigated within the framework o f a generalized superposition of coherent fields and quantum noise. Ra man or Brillouin processes (with classical pumping) are in operation i n the first waveguide. Stokes or/and anti-Stokes modes are connected t hrough the linear interaction with corresponding modes in the second w aveguide. Various phase mismatches are assumed. An approach to analyti cal solution of Heisenberg equations of motion is described. Various r egimes for different values of Stokes and anti-Stokes linear coupling constants are discussed. An influence of various phase mismatches on t he generation of nonclassical states of light including sub-Poissonian statistics, negative reduced factorial moments and squeezing of quadr ature variances is investigated.