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High-resolution arrayed waveguide grating-assisted passive optical phased array for 2D beam steering
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DOI：10.1364/OE.549588.png)
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Integrated optical phased arrays (OPAs) based on arrayed waveguide gratings (AWGs) enable two-dimensional (2D) beam steering through wavelength tuning. Achieving a high vertical resolution for practical applications remains challenging due to the waveguide phase errors associated with the large AWG required. Here, we present a high-resolution 65-channel AWGassisted OPA with 5 inputs. Ultra-low loss silicon nitride waveguide technology and transverse magnetic mode operation are employed for waveguide-phase-error mitigation. A vertical resolution of 0.32 degrees using a single input is attained with a beam width of 0.55 degrees x 0.07 degrees and an alias-free horizontal field of view (FOV) of 30 degrees. By utilizing all 5 inputs, the vertical resolution can be enhanced to 0.06 degrees. Real-time 2D beam steering over a 25 degrees x 5 degrees FOV is demonstrated. To our best knowledge, this work demonstrates the highest vertical resolution reported for an AWG-based OPA. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
期刊
IF:
3.3
论文数:
6.1W
被引数:
14.3W
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