Femtosecond laser writing of waveguide microstructures in Рb(Zr,Ti)О$_{3}$ films and their characterization by the nonlinear optical method

Femtosecond laser writing of ferroelectric one-dimensional microstructures possessing waveguide and nonlinear optical properties in Рb(Zr,Ti)О$_{3}$ films is considered, and the passage of light beams via obtained waveguide structures is traced. The optimum speed and power density of the writing laser beam are within 50–500 $\mu$m/s and 1–1.5 MW/cm$^2$, respectively. A two-stage method of writing is proposed, which provides for improved nonlinear optical properties of obtained waveguide microstructures.