Numerical Analysis of All-Optical Demultiplexing Characteristics in Semiconductor Optical Amplifiers Based on Four-Wave Mixing

Abstract

Numerically, we have analyzed the basic characteristics of all-optical demultiplexing based on four-wave mixing in semiconductor optical amplifiers by solving a modified nonlinear Schrödinger equation using the finite-difference beam propagation method. For high ON-OFF ratio, the optimum input pump pulsewidth is 1~3 ps for 1 ps, 250 Gbit/s probe pulse. From the simulation results, it is clear that for the faster demultiplexing operation, semiconductor optical amplifiers with wider gain bandwidth are required. We have simulated pattern effects in the FWM signal. We have also obtained demultiplexing from the time-multiplexed signals by repetitive pump pulses.

Numerical Analysis of Optical Phase-Conjugate Characteristics of Four-Wave Mixing Signals in Semiconductor Optical Amplifiers

“…For this simulation, we have used the modified nonlinear Schrödinger equation [1]. The details about the simulation method are explained in [4]. In this simulation, the length of the SOA is 350 μm except for Fig.…”

“…As a result of the simulation, the phase-conjugate characteristics are almost retained even for the 2 ps input pump pulsewidth. mainly due to the self-phase modulation caused by the gain saturation effect [2]- [4]. Fig.…”

All-Optical Demultiplexing Characteristics based on Four-Wave Mixing in Semiconductor Optical Amplifiers

“…The time derivative terms in the modified nonlinear Schrödinger equation have been replaced by the central-difference approximation in order to simulate this equation by the FD-BPM[4][5][6][7]. In this simulation, the length of the SOA is 350 µm except forFig.…”