Efficient optical parametric oscillation based on periodically poled 1.0 mol % MgO-doped stoichiometric LiTaO3

Abstract

Effective optical parametric oscillation (OPO) at room temperature was demonstrated by a periodically poled 1.0 mol% MgO-doped stoichiometric lithium tantalate (Mg:SLT) crystal. The slope conversion efficiency of total output power was ∼65% and the maximum output power was 655 mW at 1.3 W pumping without photorefraction. The difference of the OPO performance was investigated between 0.5 and 1.0 mol % Mg:SLT crystals, and a 1.0 mol % MgO-doped device exhibited better OPO performance and high resistance of photorefraction. The effective nonlinear coefficient of deff was found to be 10pm∕V by single-pass first-order quasiphase matched second-harmonic generation at 1064 nm.

Optical Parametric Generators and Amplifiers

“…4 shows the distribution of the MIR power in PPKTP optical parametric oscillator generating 1.5 W of average power in a 1.72 µm signal and a 2.789 µm idler [46]. Recently, this family of oxide ferroelectrics, where QPM structures have been realized and are of interest for the MIR spectral region, was joined by KNbO 3 [47] and near-stoichiometric compositions of LiNbO 3 [48] and LiTaO 3 [49,50]. The latter crystals are substantially easier to pole than their congruent counterparts.…”

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

“…This temperature elevation has long been a requirement for periodically poled crystals, adding complexity to the otherwise simple setup of an OPG. Higher resistance to photorefractive damage and green-induced infrared absorption has been observed and investigated in MgO-doped SLN (Mg:SLN) [7,8] and more recently, efficient optical parametric oscillation could be demonstrated at room temperature in MgO-doped SLT (Mg:SLT) [9]. Another advantage of Mg:SLT is the expected higher thermal conductivity due to a reduced defect density and lower operation temperature, which reduces the thermal disturbance of phase matching caused by absorption.…”

Temperature Dependent Terahertz Generation at Periodically Poled Stoichiometric Lithium Tantalate Crystal Using Femtosecond Laser Pulses

“…The stoichiometric LiTaO3 crystal used was grown by the double-crucible Czochralski method [13]. Because of the significantly lower coercive field to make the periodically poled structure into the stoichiometric crystals, the 2 mm-thick PPSLT device was achieved by the electrical poling method [14].…”