Amer Kotb.AND gate based on two-photon absorption in semiconductor optical amplifier[J].Optoelectronics Letters,2013,9(3):181-184 AND gate based on two-photon absorption in semiconductor optical amplifier Author Name Affiliation E-mail Amer Kotb  Department of Physics, Fayoum University, Fayoum, 63514, Egypt Department of Physics, College of Science, Northern Borders University, Arar, 1321, KSA  amer_22003@yahoo.com  Abstract:       An all-optical logic AND gate based on two-photon absorption (TPA) in semiconductor optical amplifier (SOA) is simulated. By solving the rate equations of SOA in the form of a Mach-Zehnder interferometer (MZI), the performance of AND gate is numerically investigated. The model takes the effects of amplified spontaneous emission (ASE) and pulse energy on the system’s quality factor (Q-factor) into account. Results show that the all-optical AND gate based on TPA in SOA-MZI based structure is feasible at 250 Gbit/s with a proper Q-factor. Hits: 4124 Download times: 86 View Full Text    Download reader