TEMPORAL SPATIAL OPTICAL CDMA NETWORKS-DESIGN, DEMONSTRATION, AND COMPARISON WITH TEMPORAL NETWORKS

We present the design and experimental results of a temporal / spatial (T / S) noncoherent optical code-division multiple access (CDMA) network, based on matrix codes, using a breadboard of passive multimode fiber-optic couplers and delay lines. We show that a T / S CDMA network allows for shorter bit times, given a set laser pulse width, compared to a temporal CDMA network. Also, T / S codes result in a reduction of autocorrelation sidelobes and cross-correlation peaks, and the T / S network has lower losses. Finally, we show that the couplers are critical components in maintaining code integrity.