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Finite-Difference Time-Domain Algorithms in the Analysis and Design of Optical Guided-Wave Devices

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Abstract

Over the past decade, the finite-difference time-domain (FDTD) method has been established in microwave and millimeter wave research as one of the most versatile and accurate methods, for the analysis of problems involving electromagnetic wave interactions. However, present optical devices contain large electrical lengths which demand vast computational resources for their analysis. This makes the applications of the FDTD method in the optical regime less attractive. This paper discusses a class of optical device analysis where the FDTD method can make a significant impact. Modifications to the full-vector algorithm, such as the semi-vectorial and scalar formulations, are also discussed. These alternate approaches improve the computational efficiency while maintaining the accuracy of the FDTD method.

© 1993 Optical Society of America

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