Silicon Optical Phased Array Hybrid Integrated with III–V Laser for Grating Lobe-Free Beam Steering
Jingye Chen,
Shi Zhao,
Wenlei Li,
Xiaobin Wang,
Xiang’e Han,
Yaocheng Shi
Affiliations
Jingye Chen
Center for Optical and Electromagnetic Research, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China
Shi Zhao
Center for Optical and Electromagnetic Research, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China
Wenlei Li
Center for Optical and Electromagnetic Research, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China
Xiaobin Wang
School of Physics, Xi’dian University, Xi’an 710071, China
Xiang’e Han
School of Physics, Xi’dian University, Xi’an 710071, China
Yaocheng Shi
Center for Optical and Electromagnetic Research, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China
A silicon photonics-based optical phased array (OPA) is promising for realizing solid-state and miniature beam steering. In our work, a 1 × 16 silicon optical phased array (OPA) hybrid integrated with a III–V laser is proposed and demonstrated. The III–V laser chip is vertically coupled with a silicon OPA chip based on a chirped grating coupler with a large bandwidth. The coupling efficiency reaches up to 90% through utilizing the metal reflector underneath the silicon oxide layer. The one-dimensional antenna array comprising silicon waveguides with half-wavelength spacing enables beam steering with none high-order grating lobes in a 180° field of view. The measured beam steering angle of the hybrid integrated OPA chip is ±25°, without grating lobes, and the suppression ratio of the side-lobes is larger than 9.8 dB with phase calibration.
