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We have analyzed the four-wave mixing (FWM) characteristics with optimum time-delays between pump and probe pulses in semiconductor optical amplifiers (SOAs) by the finite-difference beam propagation method (FD-BPM). The study of FWM characteristics with optimum time-delays between pump and probe pulses in SOAs has the importance to achieve the high FWM conversion efficiency and to clarify the timing...
A novel optical buffer memory with a shift register function using a two-dimensional array of polarization bistable VCSELs is proposed. 1-bit optical buffering, which is an essential part of the memory, has been experimentally demonstrated.
All-optical signal regeneration was experimentally demonstrated using a polarization bistable vertical-cavity surface-emitting laser. The timing jitter of the regenerated signal was reduced by optimizing injection power of a clock pulse for retiming operation.
We have analyzed the nonlinear propagation characteristics of picosecond pulses in semiconductor optical amplifiers (SOAs) by the finite-difference beam propagation method (FD-BPM). From simulation results, it was found in the output waveform that the pulses peak positions are shifted to the leading edge. The output spectra are red-shifted and the dips are observed at the higher frequency side in...
We have analyzed the nonlinear propagation characteristics and wave mixing of picosecond pulses in semiconductor optical amplifiers (SOAs) by the finite- difference beam propagation method (FD-BPM). From the simulation results, it was found in the output waveform that the pulses peak positions are shifted to the leading edge. The output spectra are red-shifted and the dips are observed at the higher...
We have numerically analyzed the basic characteristics of all-optical demultiplexing (DEMUX) based on four-wave mixing (FWM) in semiconductor optical amplifiers (SOAs). For obtaining the high ON-OFF ratio, the optimum input pump pulsewidth is 1-3 ps for 1 ps, 250 Gbit/s probe pulses. From the simulation results, it is clear that for the faster DEMUX operation, SOAs with wider gain bandwidth are required...
Numerically, we have analyzed the optical phase-conjugate characteristics of four-wave mixing signal pulses generated in semiconductor optical amplifiers by solving a modified nonlinear Schrodinger equation using the finite-difference beam propagation method. We have shown that the optical phase-conjugate characteristics of FWM signal pulses are strongly dependent on the input pump pulsewidths. It...
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 Schrodinger 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...
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