title: Linear and nonlinear optical properties of Hafnium-doped lithium-niobate crystals.
abstract: Measurements of birefringence, second-harmonic phase-matching conditions, and nonlinear coefficient d(31) are performed for a set of Hafnium-doped congruent lithium niobate (Hf:cLN) crystals as functions of dopant concentration. The data highlight that the threshold concentration, above which there is a change in the Hf incorporation mechanism, is slightly above 2mol% and that, up to this value of concentration, the efficiency of nonlinear processes is not affected by the dopant insertion. Combining these results with those already present in literature, Hf:cLN crystals appear to be very promising candidates for the development of photorefractivity-free wavelength converters working at room temperature.
authors: Paolo
authors: P
authors: Minzioni
authors: Ilaria
authors: I
authors: Cristiani
authors: Jin
authors: J
authors: Yu
authors: Jacopo
authors: J
authors: Parravicini
authors: Edvard P
authors: EP
authors: Kokanyan
authors: Vittorio
authors: V
authors: Degiorgio