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Grating lobe-free silicon optical phased array with periodically bending modulation of dense antennas

Authors :
Dong Liang
Wenlei Li
Xiaobin Wang
Xu Zhao
Zichen Guo
Xiang’e Han
Jingye Chen
Daoxin Dai
Yaocheng Shi
Source :
Optics Express. 31:11423
Publication Year :
2023
Publisher :
Optica Publishing Group, 2023.

Abstract

A grating lobe-free silicon optical phased array with large field of view is demonstrated. Antennas with periodically bending modulation are spaced at half wavelength or less. The experimental results show that the crosstalk between adjacent waveguides is negligible at 1550 nm wavelength. Additionally, to reduce the optical reflection caused by the sudden change of refractive index at the output antenna of the phased array, tapered antennas are added to the output end face so that more light will be coupled into the free space. The fabricated optical phased array shows a field of view of 120° without any grating lobes.

Details

ISSN :
10944087
Volume :
31
Database :
OpenAIRE
Journal :
Optics Express
Accession number :
edsair.doi...........a53db98347c2d6265bfb51e2d4aa9e59