Non-linear optical properties of chalcogenide and chalcohalide glasses

Some chalcogenide and chalcohalide glasses were synthesized. The third-order non-linearity was investigated experimentally by the Optical Kerr effect. The results indicated that amorphous chalcogenide films showed a very fast response in the range of 200 fs under ultrafast excitation. The ultrafast response and large third-order non-linearity are attributed to the ultrafast distortion of the electron orbits surrounding the average positions of the nucleus of atoms. With Maker fringe measurements, obvious Second Harmonic generation was observed in the chalcohalide glasses by the thermal/electrical poling, which was related to the moving and aligning of the dipoles in the glasses.