Efficient Excitation of High-Purity Modes in Arbitrary Waveguide Geometries
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Publication Date
2022Journal Title
Journal of Lightwave Technology
ISSN
0733-8724
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Type
Article
This Version
AM
Metadata
Show full item recordAbstract
Abstract—A general method is presented for exciting discrete
modes in waveguides of arbitrary geometry. Guided modes
supported by the waveguide are first calculated using a finite
difference frequency domain model. High efficiency holograms
to excite these discrete modes are then generated using the
Direct Search hologram generation algorithm. The Direct Search
algorithm is optimised such that the inherent properties of
waveguide modes are exploited to give faster execution times.
A nodeless antiresonant photonic crystal fibre is considered as
a test geometry, in which high-purity modes are experimentally
excited and in-coupling efficiencies of up to 32.8% are obtained.
Keywords
Optical waveguides, Geometry, Mathematical models, Eigenvalues and eigenfunctions, Refractive index, Propagation losses, Propagation constant, Holography, optical waveguides, fiber optics
Sponsorship
The authors wish to thank the Engineering and Physical
Sciences Research Council (EP/L015889/1, EP/T008369/1,
EP/L016567/1, and EP/T008369/1) and the Leverhulme Trust
(Research Project Grant RPG-2018-256) for financial support
during the period of this research.
Funder references
Leverhulme Trust (RPG-2018-256)
EPSRC (via University of Southampton) (517129)
Cancer Research UK (24669)
EPSRC (EP/T008369/1)
Engineering and Physical Sciences Research Council (EP/L016567/1)
Engineering and Physical Sciences Research Council (EP/L015889/1)
Identifiers
External DOI: https://doi.org/10.1109/JLT.2021.3124469
This record's URL: https://www.repository.cam.ac.uk/handle/1810/329936
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