In this paper, an all-optical logic gate with multiple functions and asymmetric structure is theoretically designed and simulated using a silicon on insulator (SOI)-based multimode interference (MMI) coupler. By switching the optical signal to different input waveguide ports, the device can function as an OR, NOT, NAND, or NOR gate simultaneously or individually. Simulation results by using three-...Show More
In this paper, we investigate the impact of timing mismatch among different sub-bands on the performance of a multicarrier spectral-slicing OFDM system with a single coherent receiver, both in the back-to-back configuration and long-distance fiber transmission. Two different timing mismatch models, namely linear timing error and Gaussian timing error, are introduced and investigated. Furthermore, ...Show More
