Optical power splitters achieving Gaussian RF beam profiles

Mikko Harjanne; Katherine Bryant; Sidra Tul Muntaha; Mikko Karppinen

doi:10.1117/12.3002547

11 March 2024 Optical power splitters achieving Gaussian RF beam profiles

Mikko Harjanne, Katherine Bryant, Sidra Tul Muntaha, Mikko Karppinen

Proceedings Volume 12892, Optical Interconnects XXIV; 128920G (2024) https://doi.org/10.1117/12.3002547
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Optical beamforming for satellite-based phased-array antenna systems can help reduce the payload weight and footprint by replacing the RF hardware with photonic integrated circuits. In this paper, simulation and measurement results are provided for 1×12 optical power splitters that provide a non-uniform Gaussian radio-frequency beam profile, thus eliminating the need for a separate amplitude modulation stage in the beamforming network. This both simplifies the optical beamforming network and reduces the total optical losses. Two splitter designs were studied: a star-coupler with non-uniform output waveguides and a cascade of tapered MMI couplers with unconstrained splitting ratios. These two designs are shown to achieve the target output power profile with insertion losses of 1.7 dB and 0.5 dB, respectively.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Mikko Harjanne, Katherine Bryant, Sidra Tul Muntaha, and Mikko Karppinen "Optical power splitters achieving Gaussian RF beam profiles", Proc. SPIE 12892, Optical Interconnects XXIV, 128920G (11 March 2024); https://doi.org/10.1117/12.3002547

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