Title :
Design of Optical XOR, XNOR, NAND, and OR Logic Gates Based on Multi-Mode Interference Waveguides for Binary-Phase-Shift-Keyed Signal
Author :
Ishizaka, Yuhei ; Kawaguchi, Yuki ; Saitoh, Kunimasa ; Koshiba, Masanori
Author_Institution :
Grad. Sch. of Inf. Sci. & Technol., Hokkaido Univ., Sapporo, Japan
Abstract :
We present a novel design method and potential application for optical XOR, XNOR, NAND, and OR logic gates for binary-phase-shift-keyed signal processing devices. The devices are composed of multi-mode interference waveguides and convert the phase information of the input signal to amplitude at the output. We apply the finite element method for numerical simulations, and the evaluated least ON to OFF logic-level contrast ratios for the XOR, XNOR, NAND, and OR logic gates are 21.5 dB, 21.5 dB, 22.3 dB, and 22.3 dB, respectively. The proposed logic gates are extremely promising signal processing devices for binary-phase-shift-keyed signals in packet switching systems.
Keywords :
amplitude shift keying; finite element analysis; light interference; logic gates; optical design techniques; optical information processing; optical logic; optical waveguides; packet switching; phase shift keying; NAND; ON-OFF logic level contrast ratios; OR logic gates; binary phase shift keyed signal processing devices; finite element method; multimode interference waveguides; optical XNOR; optical XOR; packet switching systems; Binary phase shift keying; Couplers; Logic gates; Optical amplifiers; Optical packet switching; Optical receivers; Optical waveguides; Binary-phase-shift-keyed modulation format; finite element method; multi-mode interference; optical logic gate;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2011.2160712
