Fully-automated optimization of grating couplers

We present a gradient-based algorithm to design general 1D grating couplers without any human input from start to finish, including a choice of initial condition. We show that we can reliably design efficient couplers to have multiple functionalities in different geometries, including conventional c...

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Bibliographic Details
Published in:arXiv.org 2017-11
Main Authors: Logan, Su, Trivedi, Rahul, Sapra, Neil V, Piggott, Alexander Y, Vercruysse, Dries, Vučković, Jelena
Format: Article
Language:English
Subjects:
Algorithms
Couplers
Demultiplexing
Insertion loss
Optimization
Polarization
Online Access:Get full text
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Summary:We present a gradient-based algorithm to design general 1D grating couplers without any human input from start to finish, including a choice of initial condition. We show that we can reliably design efficient couplers to have multiple functionalities in different geometries, including conventional couplers for single-polarization and single-wavelength operation, polarization-insensitive couplers, and wavelength-demultiplexing couplers. In particular, we design a fiber-to-chip blazed grating with under 0.2 dB insertion loss that requires a single etch to fabricate and no back-reflector.
ISSN:2331-8422
DOI:10.48550/arxiv.1711.02228