Low-loss LiNbO_3 tapered-ridge waveguides made by optical-grade dicing | Zendy

Nadège Courjal | Zendy; F. Devaux | Zendy; Arnaud Gerthoffer | Zendy; Clément Guyot | Zendy; Fabien Henrot | Zendy; Abdoulaye Ndao | Zendy; M.-P. Bernal | Zendy

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Low-loss LiNbO_3 tapered-ridge waveguides made by optical-grade dicing

Author(s) -

Nadège Courjal,

F. Devaux,

Arnaud Gerthoffer,

Clément Guyot,

Fabien Henrot,

Abdoulaye Ndao,

M.-P. Bernal

Publication year - 2015

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.23.013983

Subject(s) - wafer dicing , optics , materials science , resonator , lithium niobate , waveguide , fabrication , ridge , optical coherence tomography , wavefront , insertion loss , optoelectronics , physics , wafer , geology , medicine , paleontology , alternative medicine , pathology

We report on low-loss vertical tapers for efficient coupling between confined LiNbO 3 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.

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