1. Polarization Splitting Grating Coupler for Optical Antenna of LiDARs Consisting of Two Gratings Coupling Light in a Perfectly Vertical Direction
- Author
-
Hikaru Fukushima, Daisuke Inoue, Tadashi Ichikawa, Tatsuya Yamashita, and Tetsuya Shimogaki
- Subjects
Diffraction ,Physics::Optics ,02 engineering and technology ,Grating ,01 natural sciences ,Waveguide (optics) ,Silicon nanophotonics ,010309 optics ,020210 optoelectronics & photonics ,Optics ,0103 physical sciences ,Vertical direction ,0202 electrical engineering, electronic engineering, information engineering ,Applied optics. Photonics ,Electrical and Electronic Engineering ,Computer Science::Information Theory ,Physics ,Coupling ,Silicon photonics ,business.industry ,Sensors ,Optical polarization ,QC350-467 ,Optics. Light ,Polarization (waves) ,Atomic and Molecular Physics, and Optics ,TA1501-1820 ,business - Abstract
Grating couplers (GCs) are devices for transmitting and receiving the light propagated in a waveguide in silicon photonic integrated circuits (PICs). In this study, we propose a polarization splitting GC (PSGC) for the optical antenna of light detection and ranging (LiDAR). The PSGC was designed on the basis of two GCs coupling in a perfectly vertical direction. Our experiment demonstrated that the designed PSGC transmitted a polarization-multiplexed beam. The transmitting and receiving efficiencies of the optical antenna consists of lenses and PSGCs were calculated, and then the optical parameter for maximizing them was clarified.
- Published
- 2021