Impact of linear coupling on nonlinear phase noise in two-core fibers

Abstract We study the effect of linear coupling on nonlinear phase noise in two-core fibers (TCFs). Considering the elementary TCF switching process, we demonstrate reduction of nonlinear phase noise in the propagation of optically amplified pulses through TCFs. Our results show that the reduction occurs just when the first maximum transfer of optical power is carried out between the TCF cores.