Zhao Shi, Lian Daixin, Li Wenlei, Chen Jingye, Dai Daoxin, Shi Yaocheng
State Key Laboratory for Modern Optical Instrumentation, Center for Optical & Electromagnetic Research, International Research Center for Advanced Photonics, College of Optical Science and Engineering, Zhejiang University, Zijingang Campus, Hangzhou 310058, China.
State Key Laboratory for Modern Optical Instrumentation, Center for Optical and Electromagnetic Research, International Research Center for Advanced Photonics, Ningbo Innovation Center, College of Optical Science and Engineering, Zhejiang University, Hangzhou, China.
Nanophotonics. 2024 Jan 22;13(3):263-269. doi: 10.1515/nanoph-2023-0507. eCollection 2024 Feb.
We propose and demonstrate a silicon photonic optical phased array (OPA) with ultra-low sidelobe level. The arbitrary ratio power splitters (ARPSs) are introduced to manipulate the amplitude distribution between different channels and suppress the sidelobe level. A 32-channel OPA has been designed and demonstrated with the amplitude distribution determined by preferred Chebyshev method. The experimental results indicate that the sidelobe suppression ratio (SLSR) can be up to 25.3 dB. The measured field of view (FOV) is 84° × 13° with divergence of 2.8° × 1.7°. Furthermore, the frequency-modulated continuous-wave (FMCW) based ranging has been also demonstrated experimentally by utilizing the OPA as the transmitter.
我们提出并展示了一种具有超低旁瓣电平的硅光子光学相控阵（OPA）。引入了任意比例功率分配器（ARPS）来控制不同通道之间的幅度分布并抑制旁瓣电平。设计并展示了一个32通道的OPA，其幅度分布由优选的切比雪夫方法确定。实验结果表明，旁瓣抑制比（SLSR）可达25.3 dB。测得的视场（FOV）为84°×13°，发散角为2.8°×1.7°。此外，通过将OPA用作发射器，还通过实验演示了基于调频连续波（FMCW）的测距。
