Equivalent circuit model of the traveling wave electrode for lithium niobate thin film Mach-Zehnder modulators

被引：1

作者：

Guo, Yanting ^{[1
,2
]}

Li, Lianyan ^{[1
,2
]}

Zhang, Yunshan ^{[1
,2
]}

Sun, Shiyuan ^{[1
,2
]}

Quan, Qihong ^{[2
]}

Shi, Yuechun ^{[3
]}

机构：

[1] Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210023, Peoples R China

[2] Nanjing Univ Posts & Telecommun, Coll Flexible Elect Future Technol, Nanjing 210023, Peoples R China

[3] Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210009, Peoples R China

来源：

APPLIED OPTICS | 2024年 / 63卷 / 03期

基金：

中国国家自然科学基金;

关键词：

LINES; BAND;

D O I：

10.1364/AO.509361

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose an equivalent circuit model of the traveling wave electrode for lithium niobate thin film (TFLN) Mach- Zehnder modulators, in which the distributed capacitance and conformal mapping techniques are applied to calculate the microwave refractive index, microwave loss, and characteristic impedance. The accuracies of them are verified by comparing with the results of the finite element method, and the relative errors are less than 3.282%, 1.776%, and 5.334%, respectively. The influence of the electrode's structural parameters on the modulation performances is analyzed, and a 3 dB modulation bandwidth around 84 GHz with an 8-mm-long traveling wave electrode is obtained. (c) 2024 Optica Publishing Group

引用

页码：617 / 623

页数：7

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