Dual-Wavelength Packets Buffering in Dual-Loop Optical Buffer

We demonstrated 10-Gb/s dual-wavelength packets buffering in a dual-loop optical buffer with a semiconductor optical amplifier. Confirmed by experiments, the crosstalk between lambda₁ and lambda₂ signals, which is the main reason of restraining the buffering time, is decreased by using power equalization. The buffered data packets are retrieved after they are buffered for one, two, and three cycles with the maximum buffering time up to 3.75 mus. The power penalty, the extinction ratio, and the signal-to-noise ratio are 2.1, 7.5, and 4 dB, respectively, after three cycles. We obtain the eye diagrams for both wavelengths with good results, and the buffer is transparent for either wavelength.