Accession Number : ADP007609

Title :   Nonlinear Bent Directional Couplers with Asymmetrical Distribution of Nonlinearity,

Corporate Author : WARSAW TECHNICAL UNIV (POLAND)

Personal Author(s) : Karpierz, Miroslaw A.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Recently, the nonlinear directional couplers have been extensively investigated as optical devices for ultra high-speed data processing. They were analyzed for parallel waveguides as well as for configuration with bending waveguides, which is more insensitive with respect to fabrication tolerances of the device length. In most of previously analyzed nonlinear directional couplers there was assumed the symmetrical distribution of nonlinearity. However, it has been shown that for asymmetrically placed nonlinear material the required switching power is lower than for symmetrical case. In this paper the influence of asymmetry of nonlinear refractive index distribution for transmission characteristics of nonlinear bent directional coupler is analyzed. The coupled mode theory is used and numerical results show that the critical power is strongly dependent on asymmetry of nonlinearity distribution.

Descriptors :   *DATA PROCESSING, *WAVEGUIDE COUPLERS, *NONLINEAR OPTICS, *OPTICAL CIRCUITS, ASYMMETRY, BENDING, CONFIGURATIONS, DIRECTIONAL, DISTRIBUTION, FABRICATION, LENGTH, MATERIALS, PAPER, POWER, REFRACTIVE INDEX, THEORY, TOLERANCE, VELOCITY, SYMPOSIA, POLAND, OPTICAL SWITCHING.

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE