Silicon Optical Phased Array with High Sidelobe Suppression on Both Horizontal and Vertical Directions

Qiu, Huaqing; Liu, Yong; Meng, Xiansong; Guan, Xiaowei; Ding, Yunhong; Hu, Hao

doi:10.1364/cleo_si.2022.sth2g.7

Conference on Lasers and Electro-Optics 2022

DOI: 10.1364/cleo_si.2022.sth2g.7

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Silicon Optical Phased Array with High Sidelobe Suppression on Both Horizontal and Vertical Directions

Huaqing Qiu

Yong Liu

Xiansong Meng

et al.

Abstract: We experimentally demonstrated an integrated 120-channel silicon optical phased array with Gaussian power distribution on both horizontal and vertical directions to achieve high sidelobe suppression ratios (15 dB and 25 dB, respectively).

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Energy-efficient integrated silicon optical phased array

Qiu,

Liu,

Meng

et al. 2023

Front. Optoelectron.

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An optical phased array (OPA) is a promising non-mechanical technique for beam steering in solid-state light detection and ranging systems. The performance of the OPA largely depends on the phase shifter, which affects power consumption, insertion loss, modulation speed, and footprint. However, for a thermo-optic phase shifter, achieving good performance in all aspects is challenging due to trade-offs among these aspects. In this work, we propose and demonstrate two types of energy-efficient optical phase shifters that overcome these trade-offs and achieve a well-balanced performance in all aspects. Additionally, the proposed round-spiral phase shifter is robust in fabrication and fully compatible with deep ultraviolet (DUV) processes, making it an ideal building block for large-scale photonic integrated circuits (PICs). Using the high-performance phase shifter, we propose a periodic OPA with low power consumption, whose maximum electric power consumption within the field of view is only 0.33 W. Moreover, we designed Gaussian power distribution in both the azimuthal ($$\varphi$$ φ ) and polar ($$\theta$$ θ ) directions and experimentally achieved a large sidelobe suppression ratio of 15.1 and 25 dB, respectively. Graphical Abstract

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Energy-efficient integrated silicon optical phased array

Qiu,

Liu,

Meng

et al. 2023

Front. Optoelectron.

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Silicon Optical Phased Array with High Sidelobe Suppression on Both Horizontal and Vertical Directions

Abstract: We experimentally demonstrated an integrated 120-channel silicon optical phased array with Gaussian power distribution on both horizontal and vertical directions to achieve high sidelobe suppression ratios (15 dB and 25 dB, respectively).

Cited by 1 publication

References 0 publications

Energy-efficient integrated silicon optical phased array

Energy-efficient integrated silicon optical phased array

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