Title :
Simultaneous All-Optical and and nor Gates for NRZ Differential Phase-Shift-Keying Signals
Author :
Xu, Jing ; Zhang, Xinliang ; Dong, Jianji ; Liu, Deming ; Huang, Dexiu
Author_Institution :
Huazhong Univ. of Sci. & Technol., Wuhan
fDate :
4/15/2008 12:00:00 AM
Abstract :
A scheme for realizing all-optical logic AND and NOR gates simultaneously for nonreturn-to-zero differential phase-shift-keying signals is proposed and demonstrated based on a delayed interferometer and two semiconductor optical amplifiers. Experimental demonstration at 20 Gb/s verifies the logic integrity of this scheme. The final results are derived in the ON-OFF keying format with clear open eyes and extinction ratios over 10 dB. The proposed scheme can be expanded to realize arbitrary logic gate.
Keywords :
differential phase shift keying; logic gates; optical communication equipment; optical logic; semiconductor optical amplifiers; NRZ differential phase-shift-keying signals; bit rate 20 Gbit/s; delayed interferometer; logic integrity; nonreturn-to-zero differential phase-shift keying; optical AND gate; optical NOR gate; optical logic devices; semiconductor optical amplifiers; Delay; Differential phase shift keying; Differential quadrature phase shift keying; Logic devices; Logic gates; Optical interferometry; Optical signal processing; Phase shift keying; Phase shifting interferometry; Semiconductor optical amplifiers; Delayed interferometer (DI); nonreturn-to-zero differential phase-shift keying (NRZ-DPSK); optical logic devices; semiconductor optical amplifiers (SOAs);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.918822
