Author(s): Wang, Z (Wang, Z. H. E. N. G.); Ma, PF (Ma, P. E. N. G. F. E., I); Yang, YB (Yang, Y. I. B. O.); Cui, LL (Cui, L. A. N. G. L. I. N.); Yu, L (Yu, L. E., I); Luo, GZ (Luo, G. U. A. N. G. Z. H. E. N.); Wang, PF (Wang, P. E. N. G. F. E., I); Pan, JQ (Pan, J. I. A. O. Q. I. N. G.); Su, YM (Su, Y. A. N. M. E., I); Zhang, YJ (Zhang, Y. E. J. I. N.)

Source: APPLIED OPTICS Volume: 61 Issue: 36 Pages: 10788-10793 DOI: 10.1364/AO.477363 Published: DEC 20 2022

Abstract: An optical phased array (OPA) is one of the most promising methods of light detection and ranging. Anon-uniform array with different emitter distances is a method to realize OPA steering without grating lobes or a distance between two adjacent emitters larger than lambda/2. However, the side mode suppression ratio (SMSR) will decrease as OPA turns into a large angle. In this paper, 64-, 128-, and 256-channel non-uniform OPAs are optimized by non-dominated sorting genetic algorithm-II (NSGA-II), which is a multi-objective optimization algorithm. Compared with arrays optimized by a genetic algorithm, the SMSR at 80 degrees improves by 2.18, 2.61, and 2.56 dB, respectively.(c) 2022 Optica Publishing Group

Accession Number: WOS:000910846100021

PubMed ID: 36606939

ISSN: 1559-128X

eISSN: 2155-3165

Full Text: https://opg.optica.org/ao/fulltext.cfm?uri=ao-61-36-10788&id=524290