College of Materials Science and Engineering, Tongji University, Shanghai 200092, China

The quantum effect of nano-crystals is an important factor to improve nonlinear optical performance of nano-crystal embedded glasses, while controlling the size distribution and content of nano-crystals in the glass accurately is a key to obtain good quality. The auxiliary direct current electric field, accompanied with heat treatment, was applied on AgCl containing niobic tellurite glass sheet. The nucleation and crystallization of the glass were well controlled under auxiliary electric field. It was found that the average size of AgCl nano-crystal particles in the glass is smaller than that under single heat treatment, and the content of nano-crystals is higher. Therefore the third-order nonlinear optical performance of the glass was increased a lot. The local-area distributed AgCl nano-crystal particles can also be embedded into a glass sheet by using locally applied electric field.