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

被引：5

作者：

Gao, Xudong ^{[1
]}

Xu, Zhenzhu ^{[1
]}

Zhu, Yupeng ^{[1
]}

Yang, Chengkun ^{[1
]}

Han, Shoubao ^{[1
]}

Duan, Zongming ^{[1
]}

Zhang, Fan ^{[2
]}

Dong, Jianji ^{[2
]}

机构：

[1] East China Res Inst Elect Engn, Anhui Prov Engn Lab Antennas & Microwave, Hefei 230000, Peoples R China

[2] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

来源：

FRONTIERS OF OPTOELECTRONICS | 2023年 / 16卷 / 01期

关键词：

Bragg gratings; Silicon photonics; True time delay;

D O I：

10.1007/s12200-023-00061-8

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页数：9

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