Asymmetric nonlinear coupling and its applications to logic functions

Author

Yang, Chih-Chung ; Wang, Alexander J S

Author_Institution

Dept. of Electr. & Comput. Eng., Pennsylvania State Univ., University Park, PA, USA

Volume

28

Issue

2

fYear

1992

fDate

2/1/1992 12:00:00 AM

Firstpage

479

Lastpage

487

Abstract

The phenomena of asymmetric nonlinear coupling are studied. The study is aimed at the application of nonlinear coupling to all-optical logic functions. Asymmetric nonlinear coupling signifies the nonlinear coupling between two single-mode waveguides of different nonlinearities. The simulation results of NOT, AND, OR, and XOR logic functions are presented. Also, the sensitivities of the results to the variations of various signal and coupler parameters are discussed. The simulation results included three types of input signals: CW waves, picosecond solitons, and femtosecond solitons. Because of the effect of group-velocity dispersion, the results of CW and pulsed signals are quite different. Because of the effects of shock effect and Raman response, the results of femtosecond soliton signals differ from those of picosecond soliton signals. When picosecond solitons are used as input signals, the outputs are still solitons

Keywords

high-speed optical techniques; nonlinear optics; optical couplers; optical fibres; optical logic; optical waveguide theory; solitons; AND; CW waves; NOT; OR; Raman response; XOR logic functions; all-optical logic functions; asymmetric nonlinear coupling; femtosecond solitons; group-velocity dispersion; input signals; picosecond solitons; sensitivities; shock effect; single-mode waveguides; soliton outputs; Directional couplers; Fiber nonlinear optics; Kerr effect; Logic functions; Optical coupling; Optical fibers; Optical pulses; Optical solitons; Optical waveguides; Ultrafast optics;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.123276

Filename

123276