Differential drive optical modulator

G - Physics – 02 – F

Patent

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Details

G02F 1/377 (2006.01) G02F 1/035 (2006.01) G02F 1/225 (2006.01)

Patent

CA 2337017

A differential input optical modulator, suited for an electrical driver with complementary outputs is provided by the present invention. One embodiment uses an X-cut LiNb03 substrate, with or without a buffer layer, to reduce cost of manufacture in comparison to some known devices that employs a Z-cut LiNbO~ substrate. These prior art devices require both buffer and charge bleed-off layers. The present invention also includes a quasi-symmetric electrode structure in which the applied fields run parallel to the surface of the substrate.

La présente invention concerne un modulateur optique à entrée différentielle apte à être utilisé dans un étage d'attaque électrique à sorties complémentaires. Dans un mode de réalisation, on utilise un substrat en LiNbO3 à plan de coupe en X, avec ou sans couche tampon, afin de réduire le coût de fabrication par comparaison avec certains dispositifs connus dans lesquels est utilisé un substrat en LiNbO SIMILAR à plan de coupe en Z. Ces dispositifs de l'état antérieur de la technique nécessitent à la fois des couches tampons et des couches de fuite de charge. La présente invention concerne également une structure d'électrode quasi-symétrique dans laquelle les champs appliqués sont parallèles à la surface du substrat.

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