High-directionality grating coupler-based optical antenna for chip-level LiDAR applications

Zheng Wang; Pengfei Ma; Yibo Yang; Lei Yu; Liang Kong; Pengfei Wang; Jiaoqing Pan; Yanmei Su; Yejin Zhang

doi:10.1117/12.3045707

13 December 2024 High-directionality grating coupler-based optical antenna for chip-level LiDAR applications

Zheng Wang, Pengfei Ma, Yibo Yang, Lei Yu, Liang Kong, Pengfei Wang, Jiaoqing Pan, Yanmei Su, Yejin Zhang

Author Affiliations +

Proceedings Volume 13499, AOPC 2024: Optical Devices and Integration; 134990B (2024) https://doi.org/10.1117/12.3045707
Event: Applied Optics and Photonics China 2024 (AOPC2024), 2024, Beijing, China

Abstract

This paper presents a high-directionality optical grating antenna for chip-level LiDAR applications. The antenna, designed on a silicon-nitride-nitride platform, consists of two vertically stacked grating layers with a nitride waveguide layer in between. By optimizing the grating periods, duty cycles, and the relative offset between the grating layers using a particle swarm optimization algorithm, a directionality of 87.8% (0.56 dB) at 1550 nm wavelength and a minimum coupling loss of 1.7 dB were achieved. The performance of the antenna was demonstrated in a chip-to-chip transceiver configuration using a coherent detection system. With a transmitter output power of 10 dBm, the system achieved a signal-to-noise ratio of 17.7 dB and 13.2 dB at screen distances of 20 m and 40 m, respectively. These results highlight the potential of the proposed antenna for long-range, chip-level LiDAR applications.

Citation Download Citation

Zheng Wang, Pengfei Ma, Yibo Yang, Lei Yu, Liang Kong, Pengfei Wang, Jiaoqing Pan, Yanmei Su, and Yejin Zhang "High-directionality grating coupler-based optical antenna for chip-level LiDAR applications", Proc. SPIE 13499, AOPC 2024: Optical Devices and Integration, 134990B (13 December 2024); https://doi.org/10.1117/12.3045707

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