Abstract

RbTiOPO₄ (RTP) belongs to the KTiOPO₄ (KTP) family of crystals and has similarly useful nonlinear optical properties. In addition, RTP allows higher doping of rare-earth elements, such as Yb³⁺, when compared to KTP, a 2 times larger damage threshold than KTP, a very large electro-optic coefficient, a low dielectric constant and high chemical stability, which makes these materials very interesting for active photonics applications. In particular, Yb³⁺-doped RTP exhibits a broad fluorescence spectrum that has been exploited to demonstrate ultrafast operation, with pulses as short as 155 fs being generated [1]. Recently, planar waveguiding has been demonstrated in an (Yb³⁺, Nb⁵⁺):RTP film grown by liquid phase epitaxy [2], opening the possibility of planar integrated devices based on this highly functional material.

© 2013 IEEE