Low sidelobe silicon optical phased array with Chebyshev amplitude distribution
Zhao Shi,
Lian Daixin,
Li Wenlei,
Chen Jingye,
Dai Daoxin,
Shi Yaocheng
Affiliations
Zhao Shi
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, Hangzhou310058, China
Lian Daixin
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, Hangzhou310058, China
Li Wenlei
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, Hangzhou310058, China
Chen Jingye
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
Dai Daoxin
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, Hangzhou310058, China
Shi Yaocheng
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
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.
