A 4096-element 3D-integrated Si-SiN optical phased array for high-power coherent LiDAR
用于高功率相干激光雷达的4096元件3D集成硅-氮化硅光学相控阵
高出力コヒーレントLiDAR用の4096要素3D統合Si-SiN光学フェーズアレイ
4096-요소 3D 통합 Si-SiN 광 위상 배열을 이용한 고출력 간섭 LiDAR
Un arreglo de fase óptico 3D integrado de 4096 elementos en Si-SiN para LiDAR coherente de alta potencia
Un réseau de phase optique 3D intégré en silicium-nitrure de silicium à 4096 éléments pour LiDAR cohérent haute puissance
4096-элементный 3D-интегрированный оптический фазированный массив Si-SiN для мощного когерентного LiDAR
Han Wang ¹ ², Weimin Xie ¹ ², Xin Yan ¹ ², Jiaqi Li ¹ ², Youxi Lu ⁴, Ping Jiang ⁴, Feng Li ³, Kai Jin ¹ ², Xu Yang ³, Jiali Jiang ³, Keran Deng ⁵, Weishuai Chen ⁴, Jing Luo ⁴, Li Jin ⁴, Junbo Feng ⁴, Kai Wei ¹ ²
¹ State Key Laboratory of Extreme Photonics and Instrumentation, Zhejiang Key Laboratory of Autonomous Optoelectronic Perception, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
中国 杭州 浙江大学光学科学与工程学院 极端光学技术与仪器全国重点实验室 全省光电自主感知重点实验室
² ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, China
中国 杭州 浙江大学杭州国际科创中心
³ National Laboratory on Adaptive Optics, Chengdu 610209, China
中国 成都 自适应光学全国重点实验室
⁴ United Microelectronics Center Co., Ltd (CUMEC), Chongqing 401332, China
中国 重庆 联合微电子中心有限责任公司
⁵ Chongqing Normal University, College of Physics and Optoelectronic Engineering, Chongqing 401331, China
中国 重庆 重庆师范大学物理与光电工程学院
Integrated optical phased arrays (OPAs) are pivotal for next-generation solid-state light detection and ranging (LiDAR), offering high-speed, inertia-free beam steering in a compact form factor. However, achieving high angular resolution alongside multi-watt emission power remains a formidable challenge.
In this work, we present a 3D-integrated silicon-silicon nitride (Si-SiN) hybrid OPA comprising 4096 (4 × 1024) elements, packaged with a CMOS driver chip via flip-chip bonding. The proposed heterogeneous Si-SiN architecture leverages PN carrier-depletion phase shifting with sub-nanosecond response capability, currently demonstrating a 2 μs CMOS-driven beam switching time and ultra-low-power (1.5 μW/π), while delivering an angular resolution of 0.038° × 0.017° (FWHM) and a total main-lobe CW emission power of 1.5 W at a 20 W high-power injection.
This approach effectively circumvents silicon's nonlinear limitations while maintaining high-density integration. System-level validations include indoor coherent detection and a four-channel phase-locked synthetic aperture scheme that successfully compresses the beam divergence to 300 μrad. This architecture provides a scalable roadmap for the development of high-performance, long-range solid-state LiDAR systems.
