衰减全反射型聚合物电光调制器的研究
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摘要
衰减全反射(ATR)结构是光学上一种较为特殊的反射型结构，在一定的条件下，反射光的空间强度和频谱成分都会受到结构参数的影响和控制，同时反射光也携带上了结构本身的信息。
本文即以衰减全反射结构为研究内容，提出用这一结构来实现一种新型光电子器件的思想——衰减全反射型聚合物电光调制器。该调制器工作于金属包覆波导的衰减全反射导模吸收峰，利用极化聚合物电光材料的折射率对导模吸收的影响来实现电光调制，并对器件的性能指标进行了实验研究，同时利用制作的反射型电光调制器进行了视频信号良好地传输实验。理论与实验表明，该类型的电光调制器具有制备工艺简单，插入损耗小，易于集成的优点。
In the Attenuated-Total-Reflection (ATR) multi-layer structure, light reflectivity can be highly dependent on layer parameters such as the layer thickness and refractive index. A tiny change in these parameters can lead to a large change in the light reflectivity. This characteristic enables the realization of many novel optoelectronic devices based on this configuration.
In this dissertation, a new type of electro-optic polymer modulator base on ATR is introduced. This modulator works with the guided-wave reflectance peak, in which the light intensity is changed by the variation of the refractive index of poled polymer due to the electro-optic effects. Device performances have been theoretically and experimentally investigated. We also successfully carried out experiments of video signal transmission using the proposed modulator. It is shown that this new type of modulator needs simpler fabrication techniques and has lower insertion loss than that of the existing modulators.
本文即以衰减全反射结构为研究内容，提出用这一结构来实现一种新型光电子器件的思想——衰减全反射型聚合物电光调制器。该调制器工作于金属包覆波导的衰减全反射导模吸收峰，利用极化聚合物电光材料的折射率对导模吸收的影响来实现电光调制，并对器件的性能指标进行了实验研究，同时利用制作的反射型电光调制器进行了视频信号良好地传输实验。理论与实验表明，该类型的电光调制器具有制备工艺简单，插入损耗小，易于集成的优点。
In the Attenuated-Total-Reflection (ATR) multi-layer structure, light reflectivity can be highly dependent on layer parameters such as the layer thickness and refractive index. A tiny change in these parameters can lead to a large change in the light reflectivity. This characteristic enables the realization of many novel optoelectronic devices based on this configuration.
In this dissertation, a new type of electro-optic polymer modulator base on ATR is introduced. This modulator works with the guided-wave reflectance peak, in which the light intensity is changed by the variation of the refractive index of poled polymer due to the electro-optic effects. Device performances have been theoretically and experimentally investigated. We also successfully carried out experiments of video signal transmission using the proposed modulator. It is shown that this new type of modulator needs simpler fabrication techniques and has lower insertion loss than that of the existing modulators.
引文
[1] 曹庄琪，《导波光学中的转移矩阵方法》，上海交通大学出版社，2000
[2] W. P. Chen, G. Ritchie, and E. Burstein, "Excitation of surface electromagnetic-waves in attenuated total reflection prism configuration," Phys. Rev. Lett., Vol. 37, p993, 1976
[3] D. Sarid, "Long-range surface-plasma waves on very thin metal-films," Phys. Rev. Lett., Vol. 47 p1927, 1981
[4] F. Z. Yang, and J. R. Sambles, "Optical characterization of liquid-crystals by means of half-leaky guided modes," J Opt. Soc. Am. B, Vol. 10, p858, 1993
[5] A.Otto, "Excitation of nonradiative surface plasmon waves in silver by the method of frustrated total reflection," Z. Physik, Vol. 216, p398, 1968
[6] E.Kretschmann, "Die bestimmung optischer konstanten von metallen durch anregung yon oberflachenplasmaschwinggungen," Z. Physik, Vol. 248, p313, 1971
[7] S. R. J. Brueck, V. Diadiuk, and T. Jones, et al. "Enhanced quantum efficiency internal photo-emission detectors by grating coupling to surface plasma-waves," Appl. Phys. Lett, Vol. 46, p915, 1985
[8] I. P. Kaminow, W. L. Mamel, and H. P. Weber, "Metal-clad optical waveguides: analytical and experimental study, "Appl. Opt., Vol. 13, p396, 1974
[9] H. A. Jamid, and S. J. Albader, "TM-Pass polarizer using metal-clad waveguide with high index buffer layer," Electron. Lett., Vol. 24, p229, 1988
[10] K. H. Rollke, W. Sholer, "Metal-clad waveguide as cutoff polarizer for integrated-optics", IEEE J Quan. Electron., Vol. 13, p141, 1977
[2] W. P. Chen, G. Ritchie, and E. Burstein, "Excitation of surface electromagnetic-waves in attenuated total reflection prism configuration," Phys. Rev. Lett., Vol. 37, p993, 1976
[3] D. Sarid, "Long-range surface-plasma waves on very thin metal-films," Phys. Rev. Lett., Vol. 47 p1927, 1981
[4] F. Z. Yang, and J. R. Sambles, "Optical characterization of liquid-crystals by means of half-leaky guided modes," J Opt. Soc. Am. B, Vol. 10, p858, 1993
[5] A.Otto, "Excitation of nonradiative surface plasmon waves in silver by the method of frustrated total reflection," Z. Physik, Vol. 216, p398, 1968
[6] E.Kretschmann, "Die bestimmung optischer konstanten von metallen durch anregung yon oberflachenplasmaschwinggungen," Z. Physik, Vol. 248, p313, 1971
[7] S. R. J. Brueck, V. Diadiuk, and T. Jones, et al. "Enhanced quantum efficiency internal photo-emission detectors by grating coupling to surface plasma-waves," Appl. Phys. Lett, Vol. 46, p915, 1985
[8] I. P. Kaminow, W. L. Mamel, and H. P. Weber, "Metal-clad optical waveguides: analytical and experimental study, "Appl. Opt., Vol. 13, p396, 1974
[9] H. A. Jamid, and S. J. Albader, "TM-Pass polarizer using metal-clad waveguide with high index buffer layer," Electron. Lett., Vol. 24, p229, 1988
[10] K. H. Rollke, W. Sholer, "Metal-clad waveguide as cutoff polarizer for integrated-optics", IEEE J Quan. Electron., Vol. 13, p141, 1977