A novel approach for the fabrication of planar waveguides from heavy metal oxide glasses
A novel approach for the fabrication of planar waveguides from heavy metal oxide glasses
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一种用重金属氧化物玻璃制造平面波导的新方法
DOI：
10.1016/j.jnoncrysol.2009.01.058
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发表时间：
2009
影响因子：
3.5
通讯作者：
A. Jha
中科院分区：
文献类型：
--
作者：
J. Lousteau;G. Jose;D. Furniss;A. Seddon;T. Benson;A. Jha
挤出工艺用于制造预制件，以便通过拉伸工艺开发玻璃带形式的平面波导。使用三种亚碲酸盐玻璃组合物证明了整个过程的可行性。所制造的预制件呈现多层结构，具有40μm量级的较高折射率玻璃层厚度。相对于波导应用公差讨论了层厚度的纵向和横向变化。还讨论了该技术的优点、局限性和改进。 3mm 宽的带状几何形状的多层平面波导是通过在 400mm 的长度上按 1:5 的比例拉伸预制件而制成的。通过光学和电子显微镜检查波导，没有观察到结晶或污染的迹象。光波导在 7.4μm 厚、9mm 长的薄膜波导中得到成功评估。
An extrusion process is used to fabricate preforms for the development of planar waveguides in glass ribbon format through a stretching process. The feasibility of the overall process is demonstrated using three tellurite glass compositions. The manufactured preforms present multilayered structures with the higher refractive glass layer thickness of the order of 40μm. The longitudinal and transversal variations of the layer thicknesses are discussed with respect to waveguiding application tolerances. Advantages, limitations and improvement of the technique are also discussed. 3mm wide multilayered planar waveguides in ribbon geometry are produced by stretching the preforms by a 1:5 ratio over a length of 400mm. The waveguides were examined by optical and electron microscopy and no signs of crystallization or contamination are observed. Optical waveguiding is successfully assessed in 7.4μm thick and 9mm long film waveguides.