Mach–Zehnder nonlinear interferometer in photonic crystal fibers with nonlinearity profiles

In this work, we present a numerical study to investigate the transmission, extinction ratio, crosstalk and compression factor outputs of a Mach-Zehnder interferometer in photonic crystal fibers by varying the nonlinearity parameter of the fiber from beta = 1 to beta = 2 for three different nonlinearity profiles (constant, increasing and decreasing) and in three different scenarios (P-0 = P-c, P-0 < P-c and P-0 > P-c). We observed that the highest transmission (T = 67%), the highest extinction ratio (XR = 3.57 dB) and the lowest crosstalk (Xtalk = -5.25 dB) occurred in the third scenario (P-0 = 110kW > Pc) considering the decreasing profile for beta = 1.35. Such condition enables applications such as TDMA and logic circuits.