We have performed time-resolved degenerate four-wave mixing (DFWM) experiments in 75Nb2O5-20TeO2-5ZnO glasses doped by Er2O3 at different excitation intensities and lattice temperatures. DFWM signal exhibits three pea...We have performed time-resolved degenerate four-wave mixing (DFWM) experiments in 75Nb2O5-20TeO2-5ZnO glasses doped by Er2O3 at different excitation intensities and lattice temperatures. DFWM signal exhibits three peaks at high excitation intensities, where a main peak appears at zero time delay and two rather weak side peaks locate symmetrically at the negative and positive time delay, respectively. The main peak is attributed to local-field effect and two side peaks are attributed to Coulomb interaction (CI).展开更多
The third-order optical nonlinearities, includ- ing third-order nonlinear susceptibility χ(3), nonlinear refrac- tive index (n2) and temporal response, were measured with forward DFWM using Nd:YAG mode-locked pulse l...The third-order optical nonlinearities, includ- ing third-order nonlinear susceptibility χ(3), nonlinear refrac- tive index (n2) and temporal response, were measured with forward DFWM using Nd:YAG mode-locked pulse laser. The results show that Eu2O3 doped 5ZnO-20Nb2O5-75TeO2 glasses have large n2 and ultra-fast temporal response. Ra- man spectra show that Eu2O3 dopant induces the changes in the local structure of glasses. The higher the dopant concen- tration, the larger the nonlinear refractive n2 and the faster the temporal response. The enhancement on the third-order optical nonlinearities can be attributed to the deformation of the electronic clouds in [TeO4] enhanced by Eu2O3 dopant.展开更多
基金This work was suPPorted by Shanghai Priority Academic DisciPline,the National Natural Science Foundation of China(No.10234030 and 10074015),the National Key Project for Basic Research(No.1999075204),the Project Sponsored by Shangliai Science and Tech
文摘We have performed time-resolved degenerate four-wave mixing (DFWM) experiments in 75Nb2O5-20TeO2-5ZnO glasses doped by Er2O3 at different excitation intensities and lattice temperatures. DFWM signal exhibits three peaks at high excitation intensities, where a main peak appears at zero time delay and two rather weak side peaks locate symmetrically at the negative and positive time delay, respectively. The main peak is attributed to local-field effect and two side peaks are attributed to Coulomb interaction (CI).
文摘The third-order optical nonlinearities, includ- ing third-order nonlinear susceptibility χ(3), nonlinear refrac- tive index (n2) and temporal response, were measured with forward DFWM using Nd:YAG mode-locked pulse laser. The results show that Eu2O3 doped 5ZnO-20Nb2O5-75TeO2 glasses have large n2 and ultra-fast temporal response. Ra- man spectra show that Eu2O3 dopant induces the changes in the local structure of glasses. The higher the dopant concen- tration, the larger the nonlinear refractive n2 and the faster the temporal response. The enhancement on the third-order optical nonlinearities can be attributed to the deformation of the electronic clouds in [TeO4] enhanced by Eu2O3 dopant.
