Suppression of Nonlinear Optical IFWM Impairments in Optical Fiber by Modeling 40 Gb/s Transimpedance Amplifier

A suppression of nonlinear optical Intra-Channel Four Wave Mixing (IFWM) induced phase and amplitude noise in optical fiber is reported by simulation. A 40 Gb/s transimpedance amplifier (TIA) circuit was investigated for this purpose. Circuit components were modeled under thermal conditions of 30C. Using 81 k nonlinear feedback resistor RTIA, an optimal Minimum Noise Figure (MNF) of 1.758 dB was achieved. A 1.760 dB of MNF is reported when RTIA value changes to 80 k. However, when an IFWM-induced phase and amplitude combined noise is applied at the TIA input with a magnitude of 19.081 dB, it was effectively suppressed under the influence of TIA input impedance Zin of 19914 which lead to IFWM combined noise of 14.55 dB in a decreasing pattern at TIA output. An |S21| simulated measurement showed a gain of 10.15 dB.