Room temperature femtosecond optical parametric generation in MgO-doped stoichiometric LiTaO3

We demonstrate room temperature femtosecond optical parametric generation with high average output power in periodically poled MgO-doped stoichiometric LiTaO3. Direct pumping with 725-fs pulses from a passively mode-locked thin disk laser at 1030nm resulted in stable 1.5W average signal power at 1484nm at the full laser repetition rate of 59MHz. With this demonstration we achieved a significant simplification of our recently presented red-green-blue laser source because no temperature stabilization of any nonlinear crystal is require

High resolution investigation of the domain kinetics in lithium niobate and lithium tantalate single crystals

Static domain patterns produced by application of the external electric field in wide temperature range in single crystals of congruent, stoichiometric and MgO doped lithium niobate LiNbO3 (LN) and lithium tantalate LiTaO3 (LT) were investigated experimentally in great detail. Moreover the domain kinetics has been studied by computer simulation and experimentally in model structure in order to check applicability of the kinetic approach to explanation of the individual domain shape and domain structure evolution for switching from multidomain initial state [1]. The step-by-step kinetic model of the domain growth was realized in the model experiment. Evolution of two-dimensional (2D) domain patterns has been investigated in CLN produced by application of external electric field by 2D electrode grating (Fig. 1). The grating structure has been produced by photolithography and the field has been applied using liquid electrolyte. & more