Polarization dependence of four‐wave mixing in dispersion‐shifted fibers and its application to nonlinear refractive index measurements using maximum mixing efficiency

Abstract

SUMMARYIf the phase match condition is satisfied in a 1.55-µm dispersion-shifted fiber (DSF), four-wave mixing (FWM) between the signals is generated at a lower optical power level than other nonlinear phenomena. In this paper, the polarization dependence of the FWM generating efficiency is discussed. From the maximum mixing efficiency, the nonlinear refractive index and the zero-dispersion wavelength are simultaneously measured. Both DSFs of 20 and 4 km are used for studies of the polarization dependence of for the two methods are found to be in good agreement.