A novel approach to all-optical universal soliton logic gate NAND utilizing reflective semiconductor optical amplifiers

摘要

Reflective semiconductor optical amplifier (RSOA) is a versatile gain medium due to its double-pass characteristics compared to ordinary semiconductor optical amplifier. RSOA-based gain dynamics is utilized to design and analyze the NAND gate using soliton pulses for the first time. The simulation results shows that RSOA is a very good candidate for intensity encoded logic gates and processors. Extinction ratio, contrast ratio, amplitude modulation, bit error rate, and eye opening are calculated. Dependence of these performance indication parameters on control pulse energy is also investigated considering amplified spontaneous emission noise. This NAND gate can be used to design any optical logic processors in future, as it is a universal one.