Non-uniform distributed silicon optical phased array for high directionality and a wide steering range

A non-uniform distributed silicon optical phased array (OPA) is proposed and numerically demonstrated to realize high directionality and a wide range for beam steering. The OPA is composed of grating antennas with dual-layer corrugations along silicon strip waveguides, which can achieve a high direc...

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Bibliographic Details
Published in:Applied optics (2004) 2024-02, Vol.63 (6), p.1522
Main Authors: Du, Yige, Qiu, Yang, Zheng, Shaonan, Zhao, Xingyan, Dong, Yuan, Zhong, Qize, Hu, Ting
Format: Article
Language:English
Subjects:
Antennas
Beam steering
Crosstalk
Genetic algorithms
Phased arrays
Silicon
Waveguides
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Summary:A non-uniform distributed silicon optical phased array (OPA) is proposed and numerically demonstrated to realize high directionality and a wide range for beam steering. The OPA is composed of grating antennas with dual-layer corrugations along silicon strip waveguides, which can achieve a high directionality of 0.96 and a small divergence angle of 0.084°. To reduce the crosstalk between adjacent antennas and realize a wide steering range, the genetic algorithm is improved and utilized to arrange the locations of grating antennas. As a proof of concept, a 32-channel non-uniform distributed OPA is designed and thoroughly optimized. The simulation results successfully demonstrate a two-dimensional wide steering range of 70 ×18.7 with a side-mode suppression ratio (SMSR) over 10 dB.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.513812