Low-loss LiNbO3 tapered-ridge waveguides made by optical-grade dicing

We report on low-loss vertical tapers for efficient coupling between confined LiNbO3 optical ridge waveguides and Single Mode Fibers. 3D-Pseudo-Spectral-Time-Domain calculations and Optical-Coherence-Tomography-based methods are advantageously used for the numerical and experimental study of the tap...

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Bibliographic Details
Published inOptics express Vol. 23; no. 11; pp. 13983 - 13990
Main Authors Courjal, Nadège, Devaux, Fabrice, Gerthoffer, Arnaud, Guyot, Clément, Henrot, Fabien, Ndao, Abdoulaye, Artajona, Maria-Pilar
Format Journal Article
LanguageEnglish
Published Optical Society of America - OSA Publishing 01.06.2015
Subjects
Engineering Sciences
Optics
Other
Physics
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Summary:We report on low-loss vertical tapers for efficient coupling between confined LiNbO3 optical ridge waveguides and Single Mode Fibers. 3D-Pseudo-Spectral-Time-Domain calculations and Optical-Coherence-Tomography-based methods are advantageously used for the numerical and experimental study of the tapers. The tapered-section is done simultaneously with the ridge waveguide by means of a circular precision dicing saw, so that the fabrication procedure is achieved in only two steps. The total insertion losses through a 1.6 cm long ridge waveguide are measured to be improved by 3 dB in presence of the taper. These tapered-ridge waveguides open the way to the low-cost production of low-loss phase modulators or resonators.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.23.013983