A Study on Optimal Design of Optical Devices Utilizing Coupled Mode Theory and Machine Learning

Koji KUDO  Keita MORIMOTO  Akito IGUCHI  Yasuhide TSUJI  

IEICE TRANSACTIONS on Electronics   Vol.E103-C   No.11   pp.552-559
Publication Date: 2020/11/01
Publicized: 2020/03/25
Online ISSN: 1745-1353
DOI: 10.1587/transele.2019ESP0002
Type of Manuscript: Special Section PAPER (Special Section on Recent Advances in Simulation Techniques and Their Applications for Electronics)
neural network (NN),  coupled mode theory (CMT),  directional coupler type photonic devices,  optimal design,  hybrid firefly algorithm,  

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We propose a new design approach to improve the computational efficiency of an optimal design of optical waveguide devices utilizing coupled mode theory (CMT) and a neural network (NN). Recently, the NN has begun to be used for efficient optimal design of optical devices. In this paper, the eigenmode analysis required in the CMT is skipped by using the NN, and optimization with an evolutionary algorithm can be efficiently carried out. To verify usefulness of our approach, optimal design examples of a wavelength insensitive 3dB coupler, a 1 : 2 power splitter, and a wavelength demultiplexer are shown and their transmission properties obtained by the CMT with the NN (NN-CMT) are verified by comparing with those calculated by a finite element beam propagation method (FE-BPM).