| With the rapid development of all optical networks, optical signals of the long-haul transmission have to be improved. The optical signals will be degraded be many factors, which limit the transmission speed and distance of the optical signals. This problem can well be solved by using all-optical 3R (Re-amplifying,Re-shaping,Re-timing ) regeneration. The optical switch is the key of all-optical 3R regeneration. In this paper, we spread our work on Ultrafast Nonlinear Interferometer (UNI) in following aspects: 1. As the key component in UNI, Semiconductor Optical Amplifier (SOA) is studied in detail theoretically. A mathematical model was given by Optisystem2.2 to investigate the way of the optical pulse passed in SOA and the gain response characteristics of SOA. 2. The Cross-Gain Modulation (XGM) and Cross-Phase Modulation (XPM) in SOA is studied by proceeding simulation. Based on the simulation, the wavelength conversion experiment at 40Gbps was achieved, and the output in different conditions was analyzed. This work gives the simulative and experimental condition for achieving UNI optical switch. 3. The basic principle of UNI is given and studied by using Jones matrix method in detail. The reason why the switch window of UNI could be formed was given and the transmission function was analyzed. The characteristic of switch window in different conditions, such as current of SOA, power of control pulse and power of CW light, was simulated by Optisystem3.0. It is useful for debugging the switch windows in experiments. 4. The performances of UNI at 40Gbps are analyzed through the experiment. Compare with the simulation above, we change the conditions of the experiment to observe the difference in the output switch windows and discuss the reason of it. |
