Optical absorption in transparent PDMS materials applied for multimode waveguides fabrication
Optical absorption in transparent PDMS materials applied for multimode waveguides fabrication
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DOI：
10.1016/j.optmat.2007.05.041
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发表时间：
2008-03-01
影响因子：
3.9
通讯作者：
Heise, H. M.
中科院分区：
文献类型：
--
作者：
Cai, D. K.;Neyer, A.;Heise, H. M.
由于在不久的将来，市场对透明PDMS聚合物材料的光学性能有很大的兴趣，它可以集成到普通印刷电路板(PCB)中进行数据通信。本文发现，聚二甲基硅氧烷(PDMS)的吸收损失主要是由于聚合物的CH3-基团在600-900 nm光谱数据范围内的振动泛音和结合带造成的。根据在中红外和近红外光谱中观察到的甲基基带、泛音和结合带的位置，确定了非谐常数和简正振动频率。在此基础上，建立了由相应的能带位置引起的本征吸收损耗最大的波长的经验公式，该公式与实验数据吻合较好。此外，还制作了PDMS多模光波导，并在商用光数据通信传输的850 nm处测量了相应的光插入损耗，最后验证了PDMS多模光波导的热稳定性。(C)2007 Elsevier B.V.保留所有权利。
The optical properties of transparent PDMS polymer materials, which can be integrated into general printed circuit board (PCB) for data communication, are of great interest due to the substantial market expectations for the near future. For the present paper, it was found that the absorption loss in polydimethylsiloxane (PDMS) is mainly caused by the vibrational overtone and combination bands of the CH3-groups of the polymer in the spectral datacom region of 600-900 nm. Based on observed positions of fundamental, overtone and combination bands of the methyl-group, as recorded within the mid- and near-infrared spectra, anharmonicity constants and normal vibration frequencies were determined. Thus, an empirical equation for estimating the wavelengths with the most significant intrinsic absorption loss due to the corresponding band positions was formulated, which was found to agree well with the experimental data. In addition, PDMS multimode waveguides were fabricated and the respective optical insertion loss was measured at 850 nm, which is commercially used for optical datacom transmission and finally the thermal stability of PDMS multimode waveguides was verified as well. (c) 2007 Elsevier B.V. All rights reserved.