Laser Deflector Based on Electric-Field-Induced Strain of Manganese-Doped Potassium Tantalate-Niobate Single Crystals

Optical deflectors, as important functional devices, control the light wave propagation and optical beam trajectories in integrated optical systems. Herein, we design a new type of a laser deflector based on the electric-field-induced strain of manganese-doped potassium tantalate-niobate single crystals. The inverse piezoelectric effect and electrostriction under distributed electric fields are employed to create the deflectors in tetragonal and cubic samples, respectively. The maximum deflection angles are 0.13° and 0.09°, respectively, and both samples have frequency responses up to 5 kHz. The impacts of electric-field distributions on the deflection properties are analyzed. This work provides guidance for implementing reflection deflectors based on an electric-field-induced strain.