Femtosecond laser-induced transient grating in CeO₂-doped 75TeO₂-20Nb₂O₅-5ZnO glass

Multiple order self-diffractions by femtosecond laser-induced transient grating in CeO₂ doped 75TeO₂-25Nb₂O₅-5ZnO glass are investigated by pump-probe technique. The glass structure and component are investigated by Raman and visible--NIR absorption spectra. It is showed that there exists Ce³⁺ ion in tellurite glass, and the transient grating is created by the optical Kerr effects and improved by the excited particle grating from the resonant absorption of the ¹S₀ to ¹F₃ electronic energy transition of Ce³⁺ ion, and the conversion efficiency of the first order diffraction signal reaches about 11%. The results indicate that CeO₂ doped 75TeO₂-25Nb₂O₅-5ZnO glass has potential applications in ultra-fast all-optical switching.