Side lobe suppression analysis of spiral array optical antenna

Nikita M. Kondratiev; Marcus Engsig; Evgeny Lonshakov; Chaouki Kasmi; Steevy J. Cordette

doi:10.1117/12.2687176

28 November 2023 Side lobe suppression analysis of spiral array optical antenna

Nikita M. Kondratiev, Marcus Engsig, Evgeny Lonshakov, Chaouki Kasmi, Steevy J. Cordette

Proceedings Volume 12764, Optoelectronic Devices and Integration XII; 127640T (2023) https://doi.org/10.1117/12.2687176
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

Optical array antennas have diverse applications in optical communication, remote sensing, imaging, and astronomy, supporting a broad range of optical and photonics-based technologies. Traditional square phased array antennas require a half-wavelength emitter spacing to prevent secondary orders of emission (aliasing). However, achieving such small distances in optics is impractical. To break this limitation irregularly-placed arrays has been proposed. This study focuses on the alias-free spiral array, which allows for high level of sidelobe suppression. Using standard Huygens–Fresnel principle approach to calculate the emission pattern, we identify key parameters of the spiral and consider their influence on the result. We perform multi-parametric optimisation of the spiral array for maximum suppression of sidelobes, enhancing its performance by dB compared to previously suggested bio-inspired design. This research provides insights into overcoming aliasing challenges and improving the efficiency of optical array antennas.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Nikita M. Kondratiev, Marcus Engsig, Evgeny Lonshakov, Chaouki Kasmi, and Steevy J. Cordette "Side lobe suppression analysis of spiral array optical antenna", Proc. SPIE 12764, Optoelectronic Devices and Integration XII, 127640T (28 November 2023); https://doi.org/10.1117/12.2687176

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