Integrated contra-directionally coupled chirped Bragg grating waveguide with a linear group delay spectrum

Due to the advantages of low propagation loss, wide operation bandwidth, continuous delay tuning, fast tuning speed, and compact footprints, chirped Bragg grating waveguide has great application potential in wideband phased array beamforming systems. However, the disadvantage of large group delay er...

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Autores principales: Gao, Xudong, Xu, Zhenzhu, Zhu, Yupeng, Yang, Chengkun, Han, Shoubao, Duan, Zongming, Zhang, Fan, Dong, Jianji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Higher Education Press 2023
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10086080/
https://www.ncbi.nlm.nih.gov/pubmed/37036614
http://dx.doi.org/10.1007/s12200-023-00061-8
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author Gao, Xudong
Xu, Zhenzhu
Zhu, Yupeng
Yang, Chengkun
Han, Shoubao
Duan, Zongming
Zhang, Fan
Dong, Jianji
author_facet Gao, Xudong
Xu, Zhenzhu
Zhu, Yupeng
Yang, Chengkun
Han, Shoubao
Duan, Zongming
Zhang, Fan
Dong, Jianji
author_sort Gao, Xudong
collection PubMed
description Due to the advantages of low propagation loss, wide operation bandwidth, continuous delay tuning, fast tuning speed, and compact footprints, chirped Bragg grating waveguide has great application potential in wideband phased array beamforming systems. However, the disadvantage of large group delay error hinders their practical applications. The nonlinear group delay spectrum is one of the main factors causing large group delay errors. To solve this problem, waveguides with nonlinear gradient widths are adopted in this study to compensate for the nonlinear effect of the grating apodization on the mode effective index. As a result, a linear group delay spectrum is obtained in the experiment, and the group delay error is halved. GRAPHICAL ABSTRACT: [Image: see text] SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s12200-023-00061-8.
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spelling pubmed-100860802023-04-12 Integrated contra-directionally coupled chirped Bragg grating waveguide with a linear group delay spectrum Gao, Xudong Xu, Zhenzhu Zhu, Yupeng Yang, Chengkun Han, Shoubao Duan, Zongming Zhang, Fan Dong, Jianji Front Optoelectron Research Article Due to the advantages of low propagation loss, wide operation bandwidth, continuous delay tuning, fast tuning speed, and compact footprints, chirped Bragg grating waveguide has great application potential in wideband phased array beamforming systems. However, the disadvantage of large group delay error hinders their practical applications. The nonlinear group delay spectrum is one of the main factors causing large group delay errors. To solve this problem, waveguides with nonlinear gradient widths are adopted in this study to compensate for the nonlinear effect of the grating apodization on the mode effective index. As a result, a linear group delay spectrum is obtained in the experiment, and the group delay error is halved. GRAPHICAL ABSTRACT: [Image: see text] SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s12200-023-00061-8. Higher Education Press 2023-04-10 /pmc/articles/PMC10086080/ /pubmed/37036614 http://dx.doi.org/10.1007/s12200-023-00061-8 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Research Article
Gao, Xudong
Xu, Zhenzhu
Zhu, Yupeng
Yang, Chengkun
Han, Shoubao
Duan, Zongming
Zhang, Fan
Dong, Jianji
Integrated contra-directionally coupled chirped Bragg grating waveguide with a linear group delay spectrum
title Integrated contra-directionally coupled chirped Bragg grating waveguide with a linear group delay spectrum
title_full Integrated contra-directionally coupled chirped Bragg grating waveguide with a linear group delay spectrum
title_fullStr Integrated contra-directionally coupled chirped Bragg grating waveguide with a linear group delay spectrum
title_full_unstemmed Integrated contra-directionally coupled chirped Bragg grating waveguide with a linear group delay spectrum
title_short Integrated contra-directionally coupled chirped Bragg grating waveguide with a linear group delay spectrum
title_sort integrated contra-directionally coupled chirped bragg grating waveguide with a linear group delay spectrum
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10086080/
https://www.ncbi.nlm.nih.gov/pubmed/37036614
http://dx.doi.org/10.1007/s12200-023-00061-8
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