In search of highly effective modeling tools for the CAD of photonic devices and components

Michele A. Forastiere; Giancarlo C. Righini; Gaetano Bellanca; Giovanni Tartarini; Paolo Bassi

doi:10.1117/12.447649

6 November 2001 In search of highly effective modeling tools for the CAD of photonic devices and components

Michele A. Forastiere, Giancarlo C. Righini, Gaetano Bellanca, Giovanni Tartarini, Paolo Bassi

Proceedings Volume 4453, Materials and Devices for Photonic Circuits II; (2001) https://doi.org/10.1117/12.447649
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

The search for a reliable, low-cost, general-application modeling tool has been assuming a growing importance among integrated optics theoreticians. For example, finite-difference (FD) based algorithms have given rise to commercial photonic CAD software programs that are less expensive, from both financial and computational points of view, than finite-elements (FEM) based ones. On the other hand, the former show some computational drawbacks that do not permit to consider them as of truly general application, while the latter provide extremely reliable modeling tools. Recently, a few numerical techniques (alternative to both FD and FEM methods) have been proposed, mainly in view of an improvement in flexibility and a reduction in computational cost. In particular, methods based on the Galerkin approach and Krylov reduction have proven particularly effective for the solution of the Helmholtz equation in a very wide class of integrated optical structures. Moreover, these methods are very promising from the point of view of reliability and are computationally non-expensive. Here, we present the implementation of one of such numerical techniques, the so-called Arnoldi-Galerkin method, together with that of a home-made FEM software program. A comparison with the results from other algorithms is shown as well.

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Michele A. Forastiere, Giancarlo C. Righini, Gaetano Bellanca, Giovanni Tartarini, and Paolo Bassi "In search of highly effective modeling tools for the CAD of photonic devices and components", Proc. SPIE 4453, Materials and Devices for Photonic Circuits II, (6 November 2001); https://doi.org/10.1117/12.447649

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KEYWORDS

Finite element methods

Integrated optics

Waveguides

Refractive index

Solid modeling

Computer aided design

Wave propagation

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