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Optimization of a programmable λ/2-pitch optical phased array

MPG-Autoren
/persons/resource/persons269799

Sharma,  Ankita       
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

/persons/resource/persons260274

Straguzzi,  John N.
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

/persons/resource/persons277233

Xue,  Tianyuan
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

/persons/resource/persons269781

Govdeli,  Alperen
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

/persons/resource/persons260636

Chen,  Fu Der
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

/persons/resource/persons265926

Stalmashonak,  Andrei
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

/persons/resource/persons258003

Sacher,  Wesley D.       
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

/persons/resource/persons257612

Poon,  Joyce K. S.       
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

Externe Ressourcen

https://doi.org/10.1515/nanoph-2023-0819
(Verlagsversion)

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10.1515_nanoph-2023-0819.pdf
(Verlagsversion), 2MB

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Zitation

Sharma, A., Straguzzi, J. N., Xue, T., Govdeli, A., Chen, F. D., Stalmashonak, A., et al. (2024). Optimization of a programmable λ/2-pitch optical phased array. Nanophotonics. doi:10.1515/nanoph-2023-0819.


Zitierlink: https://hdl.handle.net/21.11116/0000-000F-24C9-6
Zusammenfassung
A challenge in optical phased arrays (OPAs) is to achieve single-lobe emission using densely spaced emitters without incurring inter-waveguide optical crosstalk. Here, we propose to heuristically optimize the amplitude and phase of each grating antenna in an OPA to correct for optical non-idealities, including fabrication variations and inter-waveguide crosstalk. This method was applied to a silicon photonic integrated circuit with 1 mm-long gratings at 775 nm spacing for operation in a wavelength range of 1450–1650 nm. We achieved a wide two-dimensional beam-steering range of 110° × 28°, evaluated over a 127° × 47° field-of-view (FOV). Within this FOV, we measured an average sidelobe suppression of 8.2 dB and focused on average, 34.5 % of the emitted power into the main lobe. We achieved a peak sidelobe suppression of 14.5 dB and 50 % of the power concentrated in the main lobe. The approach is suitable for applications that require alias-free out-of-plane emission.