Efficient Excitation of High-Purity Modes in Arbitrary Waveguide Geometries
Journal of Lightwave Technology
Institute of Electrical and Electronics Engineers (IEEE)
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Mouthaan, R., Christopher, P., Pinnell, J., Frosz, M., Gordon, G., Wilkinson, T., & Euser, T. (2022). Efficient Excitation of High-Purity Modes in Arbitrary Waveguide Geometries. Journal of Lightwave Technology https://doi.org/10.1109/JLT.2021.3124469
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.
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.
Leverhulme Trust (RPG-2018-256)
EPSRC (via University of Southampton) (517129)
Cancer Research UK (24669)
Engineering and Physical Sciences Research Council (EP/L016567/1)
Engineering and Physical Sciences Research Council (EP/L015889/1)
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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