Nonlinear Characterization of Waveguide Index Profile: Application to Soft-Proton-Exchange in LiNbO3

被引：1

作者：

Neradovskiy, Maxim ^{[1
,2
]}

Tronche, Herve ^{[1
]}

Chezganov, Dmitry ^{[1
,2
]}

Pashnina, Elena ^{[2
]}

Vlasov, Evgeniy ^{[2
]}

Baldi, Pascal ^{[1
]}

Lunghi, Tommaso ^{[1
]}

Shur, Vladimir ^{[2
]}

Doutre, Florent ^{[1
]}

De Micheli, Marc ^{[1
]}

机构：

[1] Univ Cote Azur, CNRS, Inst Phys Nice, Parc Valrose, F-06108 Nice, France

[2] Ural Fed Univ, Sch Nat Sci & Math, Ekaterinburg 620000, Russia

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2021年 / 39卷 / 14期

基金：

俄罗斯科学基金会;

关键词：

Nonlinear optics; refractive index; optical waveguide; mode matching method; 2ND-HARMONIC GENERATION; FABRICATION;

D O I：

10.1109/JLT.2021.3077637

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：

In integrated photonics, the precise knowledge of the waveguides refractive index profile is mandatory for the modeling of photonic chips and therefore implementing innovative circuits. Usual index profile determination relies on effective index measurement of propagating modes in planar waveguides coupled with numerical fitting tools. In this paper we propose an alternative technique based on the characterization of the second harmonic generation signature of a nonlinear waveguide. We include the characterization of high-order spatial modes showing their relevance to probe both vertical and lateral distributions. We finally provide an explicit profile ready-to-use for modeling soft-proton exchanged waveguides in lithium niobate and we test its prediction capability.

引用

页码：4695 / 4699

页数：5

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