【摘要】 掺铒光波导主要用来制作光波导放大器。采用溶胶-凝胶法制备了透明、稳定的掺铒的铝硅酸盐玻璃溶胶;使用浸渍提拉法或旋转涂敷法,并通过放在乙醇蒸汽中干燥,可在玻璃表面得到均匀的凝胶膜;最后样品在一定温度下烧结;通过多次重复涂敷-烧结这一工艺流程可以形成厚的硅酸盐玻璃膜层并得到波导结构。使用显微镜研究了凝胶膜表面性质,通过棱镜耦合法测量了波导的有效折射率Nm,也测定了所制备波导的吸收光谱。溶胶-凝胶法在制作均匀性好、高掺铒浓度的铝硅酸盐玻璃光波导上具有优势。更多还原

【Abstract】 Erbium-doped optical waveguide is used to fabricate optical waveguide amplifiers. Stable and transparent Er3+ doped aluminosilicate glass sol was prepared by the sol-gel route. Then the gel film can be prepared by dip-coating or spin-coating technique on the surface of glass and followed by drying in the ethanol vapor. Thick layers of silicate glass can be formed by repetitively using this technique. Waveguide structures can be fabricated by sintering the sample at certain temperature. Microscope was employed to investigate the surface characteristics of the gel films. Its effective refractive indexes Nm were detected by coupled prism method. The absorption spectra of waveguide were measured. The sol-gel approach has advantages in forming high uniformity and high concentration erbium-doped aluminosilicate glass optical waveguide.更多还原