An on-chip optical phased array (OPA) is considered as a promising solution for next generation solid-state beam steering.However,most of the reported OPAs suffer from low operating bandwidths,making them limited in m...An on-chip optical phased array (OPA) is considered as a promising solution for next generation solid-state beam steering.However,most of the reported OPAs suffer from low operating bandwidths,making them limited in many applications.We propose and demonstrate a high-speed 2D scanning OPA based on thin-film lithium niobate phase modulators with traveling-wave electrodes.The measured modulation bandwidth is up to 2.5 GHz.Moreover,an aperiodic array combined with a slab grating antenna is also used to suppress the grating lobes of far-field beams,which enables a large field of view (FOV) as well as small beam width.A 16-channel OPA demonstrates an FOV of 50°×8.6°and a beam width of 0.73°×2.8°in the phase tuning direction and the wavelength scanning direction,respectively.展开更多
基金National Key Research and Development Program of China (2021YFB2801703)National Natural Science Foundation of China (62105286,62135011)+2 种基金“Pioneer” and “Leading Goose” RD Program of Zhejiang(2022C01103)Natural Science Foundation of Ningbo Municipality (2023J282)Fundamental Research Funds for the Central Universities。
文摘An on-chip optical phased array (OPA) is considered as a promising solution for next generation solid-state beam steering.However,most of the reported OPAs suffer from low operating bandwidths,making them limited in many applications.We propose and demonstrate a high-speed 2D scanning OPA based on thin-film lithium niobate phase modulators with traveling-wave electrodes.The measured modulation bandwidth is up to 2.5 GHz.Moreover,an aperiodic array combined with a slab grating antenna is also used to suppress the grating lobes of far-field beams,which enables a large field of view (FOV) as well as small beam width.A 16-channel OPA demonstrates an FOV of 50°×8.6°and a beam width of 0.73°×2.8°in the phase tuning direction and the wavelength scanning direction,respectively.
