Accession Number : ADP008142

Title :   Application of the Discrete Spectral Index Method to the Design of Coupled Ridge Waveguides with Carrier Injection,

Corporate Author : SHEFFIELD UNIV (UNITED KINGDOM) DEPT OF ELECTRONIC AND ELECTRICAL ENGINEERING

Personal Author(s) : Burke, S. V. ; Adams, M. J. ; Kendall, P. C. ; Robson, P. N. ; Rees, G. J.

Report Date : APR 1992

Pagination or Media Count : 2

Abstract : The discrete spectral index (DSI) method has proved successful for modelling single rib waveguides, symmetric and asymmetric couplers. For couplers, the method produces propagation constants for the lowest-order symmetric and antisymmetric supermodes, Bs, and Aas, and generates accurate field profiles. A necessary feature of the DSI method is that the layers below the ribs must be of uniform refractive index, n. However, for example a twin-guide laser amplifier, consisting of two coupled ridge waveguides, experiences small non-uniform changes in n in the active layer as a result of carrier injection. In this work, a technique, which is a combination of the DSI method and a perturbation approach, has been developed to model such structures.

Descriptors :   *WAVEGUIDE COUPLERS, *OPTICAL WAVEGUIDES, CONSTANTS, INJECTION, LASER AMPLIFIERS, LASERS, LAYERS, MODELS, PERTURBATIONS, PROFILES, REFRACTIVE INDEX, RIDGES, STRUCTURES, LIGHT TRANSMISSION, PERTURBATION THEORY, GREAT BRITAIN.

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE