Fabrication of Transparent Optical Glasses Containing BBO Crystals by Incorporation Method

• Main Authors: Yeou-Eah Tsai, 才有益
• Other Authors: Yen-Hwei Chang
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/98234796984378881349

博士 === 國立成功大學 === 材料科學及工程學系碩博士班 === 91 === 　　The fabrication of transparent B2O3-based glasses containing non-linear optical crystal of β-BaB2O4(BBO) particles by incorporation method was studied. For glass phases, 45BaO-24B2O3-31SiO2（GPI） and 40BaO-30B2O3-25SiO2-5K2O（GPII） were used. Besides, the BBO crystal phase was prepared by annealing the BaO-B2O3 powder at 850℃ for 5 hours. 　　From the results of experimental, the BBO particle has been successfully incorporated into glasses by adjusting the melting temperature, soaking time and the amount of BBO. A small difference in the refractive index between matrix glass and incorporated crystals, is a significant reason for the transparency. 　　The refractive index and thermal stability was increased for the change of coordination number when the BBO was dissolved. The β–phase could be transformed to α–phase when the remelting time and/or temperature was increased. We concluded that the efficiency of SHG was dependent on the content of BBO particles within the glass matrix. The SHG efficiency reached to 4.5% of pure BBO crystal when the GPI-glass containing 15wt% of BBO was remelted at a temperature of 1020℃ for 3min, and it reached to 10% for the GPII- glass at 960℃ for 5min.