Ar^+ ion milling rib waveguides on nonlinear optical (Yb,Nb):RTP/RTP epitaxial layers

Abstract

Abstract:In this paper we present the fabrication and characterization of rib waveguides made on (Yb,Nb):RbTiOPO 4 /RbTiOPO 4 epitaxial layers. Liquid phase epitaxy (LPE) was used to grow planar thin films followed by Ar + ion milling for surface rib fabrication. Here, we report the detailed fabrication procedure and characterization of the ribs. The study reveals good optical confinement and that type II second harmonic generation inside the rib was obtained, showing the generation of green light at 570 nm. Jaque, G. Lifante, M. Aguiló, and F. Díaz, "Mirrorless buried waveguide laser in monoclinic double tungstates fabricated by a novel combination of ion milling and liquid phase epitaxy," Opt.