Analysis of High-Index Contrast Lithium Niobate Waveguides Fabricated by High Vacuum Proton Exchange - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Lightwave Technology Année : 2018

Analysis of High-Index Contrast Lithium Niobate Waveguides Fabricated by High Vacuum Proton Exchange

Résumé

—High-index contrast waveguides fabricated with precise control and reproducibility are of high interest for nonlinear and/or electro-optical highly efficient and compact devices for quantum and classical optical data processing. Here we present a new process to fabricate planar and channel optical waveguides on lithium niobate substrates that we called High Vacuum Proton Exchange (HiVacPE). The main purpose was to improve the reproducibility and the quality of the produced waveguides by limiting and controlling the water traces in the melt, which is used for the ionic exchange. Moreover, we discovered that, when the acidity of the bath is increased, depending on substrate orientation (Z-cut or X-cut) the waveguides are completely different in term of crystallographic properties, index profiles and nonlinearity. The best-obtained channel waveguides exhibit a refractive index contrast as high as 0.04 without any degradation of the crystal nonlinearity and state of the art propagation losses (0.16dB/cm). We have also demonstrated that the HiVacPE process allows fabricating waveguides on Z-cut substrate with high-index contrast up to 0.11 without degrading the crystal nonlinearity but high strain induced propagation losses. On top of that, we proposed an original and very useful method of analyzing waveguides with complex index profiles. This method can be used for the analysis of any waveguides whose core contains several layers.
Fichier principal
Vignette du fichier
HiVacPE_HAL.pdf (4.79 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01784926 , version 1 (03-05-2018)

Identifiants

Citer

Alicia Petronela Rambu, Alin Marian Apetrei, Florent Doutre, Hervé Tronche, Marc de Micheli, et al.. Analysis of High-Index Contrast Lithium Niobate Waveguides Fabricated by High Vacuum Proton Exchange. Journal of Lightwave Technology, 2018, pp.1 - 1. ⟨10.1109/JLT.2018.2822317⟩. ⟨hal-01784926⟩

Relations

204 Consultations
290 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More