Wide-Angle Beam-Steering Using an Optical Phased Array with Non-Uniform-Width Waveguide Radiators

• DOI: 10.3390/photonics7030056
• Publication Date: 2020-08-03T11:45:57Z
• Authors: Youngin Kim; Hyeonho Yoon; Jong-Bum You; Minchul Kim; Hyo-Hoon Park
• Keywords: Beam steering; Phased-array optics; Waveguide; Crosstalk; Side lobe; Slotted waveguide; Main lobe; Phase shift module

We demonstrate wide-angle beam-steering using an optical phased array (OPA) with waveguide radiators designed non-uniform widths to reduce the crosstalk between waveguides. The OPA consists of a silicon based 1 × 16 electro-optic phase shifters and end-fire radiators. were configured four different half-wavelength spacing, which can remove higher-order diffraction patterns in free space. waveguides showed low −10.2 dB at wavelength 1540 nm. With control, achieved wide over ±80° side-lobe suppression 7.4 dB.