Large Stable Second-Order Coefficients and Waveguide Device Application in Poled Silica Film Doped with Azo Dye

Sol—gel processed silica films doped with organic azo dyes in a higher concentration of 40 wt%, are prepared. Large second-order nonlinear optical coefficients are obtained from azo dye doped silica film for the fundamental wavelength of 1064 nm, and the value is unvaried for 1000h with no relaxation at 125°C. Moreover, ridge-type channel waveguide is fabricated, and Cerenkov-type phase-matched SHG is realized.