Abstract: Thin films of poly(N-vinylcarbazole) (PVK) were prepared by spincoating upon fused silica substrates. PVK was dissolved in dimethyl formamide (DMF) and processed at elevated temperatures. Thin films with the required thickness and low surface roughness were obtained by careful optimization of the preparation parameters, such as concentration, spinning speed and temperature of these spincoating process. The dispersion of refractive indices of PVk films was measured by reflectometry and by prism coupling at 633 nm and 1064 nm. The attenuation loss of slab waveguides was measured by monitoring the stray light of the guided mode with a diode array. The loss depends significantly on the relative ratio of surface roughness to thickness. As this ratio depends on preparation conditions, we succeeded in fabricating planar waveguides of PVK that had an attenuation loss of only 1 dB/cm at 633 nm. !16
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机译：摘要：通过在熔融石英基体上旋涂制备聚（N-乙烯基咔唑）（PVK）薄膜。将PVK溶解在二甲基甲酰胺（DMF）中，并在高温下进行处理。通过仔细优化制备参数，例如这些旋涂工艺的浓度，纺丝速度和温度，可以获得具有所需厚度和低表面粗糙度的薄膜。通过反射法和通过在633nm和1064nm处的棱镜耦合来测量PVk膜的折射率的分散。平板波导的衰减损耗是通过用二极管阵列监测导模的杂散光来测量的。损耗很大程度上取决于表面粗糙度与厚度的相对比率。由于该比率取决于制备条件，因此我们成功地制造了PVK平面波导，该波导在633 nm处的衰减损耗仅为1 dB / cm。 ！16
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