High performance mode adapters based on segmented SPE:LiNbO3 waveguides

Davide Castaldini (1, 2) , Paolo Bassi (1) , Pierre Aschieri (2) , Sorin Tascu (2, 3) , Marc de Micheli (2) , Pascal Baldi (2)

1 Dipartimento di Elettronica Informatica e Sistemistica
2 LPMC - Laboratoire de physique de la matière condensée
3 Alexandru Ioan Cuza University of Iasi

We propose a new mode adapter which allows more efficient launching of the optical power selectively in the fundamental mode of a multimode waveguide. Theoretical and experimental results confirm that such a mode adapter increases the performances in terms of coupling efficiency, coupling tolerances and transmitted power with respect to previously proposed solutions. Proof of principle of device operation is obtained with a simple Coupled Mode Theory model. Experimental results are obtained at a wavelength of 840 nm in Lithium Niobate Soft Proton Exchanged waveguides and agree very well with theoretical predictions.

Domaines: Autre [cond-mat.other]

Davide Castaldini, Paolo Bassi, Pierre Aschieri, Sorin Tascu, Marc de Micheli, et al.. High performance mode adapters based on segmented SPE:LiNbO3 waveguides. Optics Express, 2009, 17 (20), pp.OPTICS EXPRESS 17868. ⟨hal-00433411⟩