Linear electro-optical analysis model of a lithium niobate thin film modulator with arbitrary crystal axis orientation

被引：2

作者：

Li, Ye ^{[1
]}

Hong, Lihong ^{[1
]}

Chen, Baoqin ^{[1
,2
]}

Li, Zhi-yuan ^{[1
,2
]}

机构：

[1] South China Univ Technol, Sch Phys & Optoelect, Guangzhou 510641, Peoples R China

[2] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2024年 / 41卷 / 02期

基金：

中国国家自然科学基金;

关键词：

COEFFICIENTS; PHOTONICS;

D O I：

10.1364/JOSAB.508002

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose an improved model for the electro-optic (EO) properties of a thin film lithium niobate (TFLN) MachZehnder (MZ) electro-optic modulator (EOM) with arbitrary crystal axis orientation. We develop an analytical theory based on second-order nonlinear optics to describe the linear EO effect and establish an approximate calculation method with the aid of coupling theory and perturbation theory. By focusing on the optical and microwave electric fields' dominant components and disregarding minor ones, we simplify the calculation process for the EO coupling coefficient and half-wave voltage length product (V pi center dot L). We achieve a 12% increase in the EO coupling coefficient and a 10% reduction in V pi center dot L by adjusting the crystal axis direction. Our research has significant implications for the design of the TFLN MZ EOM. (c) 2024 Optica Publishing Group

引用

页码：529 / 538

页数：10

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