Abstract

One of the most dominant nonlinear effects in single-mode fibers is stimulated Brillouin scattering (SBS). The generation of SBS in a ring resonator can be considered as a lasing action, with the Stokes output downshifted in frequency by an amount equal to the Brillouin frequency. In the stationary case stimulated Brillouin scattering in a length of optical fiber can be described by the following partial differential equations for the slowly varying complex amplitudes of the pump wave E_p and the backscattered first order Stokes wave E_B1, with the wave amplitudes E_i related to the intensities I_i by I_i = |E_i|² (i=p,B1) [1]: (1) In a ring resonator geometry as depicted in Fig. 1 the wave amplitudes at the ports of the directional coupler obey the relations [2] (2) where $V_k^2$ is the coupler intensity radiation loss, K is the field coupling coefficient, and T is the field transmission coefficient.

© 1992 Optical Society of America