An all-optical, XOR logic gate for high-speed RZ-DPSK signals by FWM in semiconductor optical amplifier

作者：Deng Ning^*; Chan Kit; Chan Chun Kit; Chen Lian Kuan

来源：IEEE Journal of Selected Topics in Quantum Electronics, 2006, 12(4): 702-707.

DOI：10.1109/JSTQE.2006.876603

• all-optical logic gate
• differential phase-shift keying (DPSK)
• exclusive OR (XOR)
• four-wave mixing (FWM)
• optical signal processing
• semiconductor optical amplifier (SOA)

All-optical exclusive-OR (XOR) logic gate is a basic and crucial element for optical signal processing. We propose and demonstrate a novel high-speed all-optical XOR gate based on four-wave mixing (FWM) in a semiconductor optical Amplifier, with optical return-to-zero differential phase-shift keying (RZ-DPSK) input signals. With this constant-envelope modulation format, the patterning effect-induced signal degradation in semiconductor optical amplifier (SOA) is alleviated. The proposed XOR gate can accommodate both two-input and three-input logic operations, which offer better flexibility for cascaded all-optical processing Experimental demonstrations at 10- and 20-Gb/s verified the logic integrity of the proposed XOR gate. In addition, the XOR output tolerance against temporal misalignment among the data inputs is also experimentally investigated.

• 出版日期2006-8
• 单位香港中文大学