Houari BETTAHAR : "High precision 3D photo-robotics nano-positioning for integrated hybrid optics"

PhD Work : High precision 3D photo-robotics nano-positioning for integrated hybrid optics

Abstract :

The hybrid integration of individual photonic elements appears as promising, because it may provide high performances, propose new optical functionalities and products and exploit new propagation modes of light beams. This approach requires an accurate multi Degree-Of-Freedom (DOF) positioning of the individual photonic elements. Hence, the inaccurate multi-DOF measurement and robots control are the main locks to overcome, notably at the micro-scale. For this sake, an original photo-robotic approach has been proposed, relying on multi-DOF robot motion associated with the use of 1-D Fabry-Peret interferometry measure to realize multi-DOF pose measure. This approach notably integrates the issue of 6-DOF robot calibration that has been studied through extrinsic and/or intrinsic geometrie parameters calibration. In order to find the appropriate calibration strategy for high positioning accuracy and adapted to the context of micro positioning of optical components, a quantification and durability analysis of optical and robotic performances have been investigated. Experimental investigations demonstrate that a rotational and translational positioning accuracy of 0.004° and 27.6 nm have been obtained respectively. This photo-robotic approach has especially been applied to achieve the 6-DOF positioning of an optical lamella relative to an optical fiber with high accuracy that also conduct to maximum optical performances. The approach has also been applied to control the optical polarization states at the output of an hybrid optical system through achieving high accurate rotations of a specific optical wave plate around the optical axis. The experimental results notably demonstrate that the high positioning accuracy enables to accurately control of the optical polarization state.

 Composition of the jury : 

M. Tichem Marcel, Associate Professor, Delft University of Technology,  Reviewer

Philippe ADAM, Responsable Domaine Direction Générale de l'armement, Scientific Reviewer

Mme Maria- Pilar BERNAL, Directeur de Recherche CNRS, Université de Franche-Comté, Reviewer

Philippe LUTZ Professeur des Universités Université de Franche-Comté, Phd Director

Cédric CLEVY Maître de Conférences Université de Franche-Comté, PhD Co-director

Mme Nadège COURJAL Maître de Conférences Université de Franche-Comté, PhD Co-director

Yassine HADDAB Professeur des Universités Université de Montpellier,  Reporter

M. Frédéric LAMARQUE Professeur des Universités, Université de Technologie de Compiègne, Reporter

Localization : Amphithéâtre Jules Haag - 26, Rue de l'Epitaphe - Besançon