有機高分子材料廣泛的應用在光資料儲存、光通訊及光信號處理，尤其在電光調變器的應用，更顯示出許多優越的特性，如高電光係數，更寬的頻寬，更快的反應時間，本實驗之目的是針對新的高分子材料量測其電光係數，以找出適宜用在低驅動電壓電光調變器之材料。

Organic polymer materials have been broadly applied in optical storage, optical communication and optical signal process. It has been revealed that these organic materials have some superior characteristics such as larger electro-optical (EO) coefficients, broader bandwidth and shorter response time, which make it good for EO modulator application. In our study, the goal is to study the EO coefficient of novel polymer material to be used in low driving voltage EO modulator.
During the experiment, the dependence of the second harmonic generation (SHG) intensity on doping concentration of DR1/PMMA was observed and a reasonable explanation of the nonlinear dependency was given. We measured the EO coefficient of a new material, ASF/PMMA, using a Mach-Zehnder interferometer. We also observed the relaxation process of SHG intensity of this new material, which was compared with that of DR1/PMMA.
Under the same measurement condition, we found that the EO coefficient of ASF/PMMA (13.1 pm/V) is significantly larger than that of DR1/PMMA (3 pm/V). It is also found that relaxation time of ASF/PMMA and DR1/PMMA are 22 and 8.5 seconds, respectively. Because of the superior characteristics of this material, it is suitable to be used in EO modulator.

第一章 緒論
第二章 有機高分子材料之非線性光學原理
2.1 有機發色團
2.2 非線性光學
2.3 非中心對稱材料與χ(2)之關係
2.4 電光效應
第三章 實驗
3.1 樣品製作
3.1.1 基板清洗
3.1.2 溶液配製及薄膜樣品製程
3.2 樣品極化
3.3 倍頻訊號即時監控系統
3.4 電光係數的量測
第四章 結果與討論
4.1 DR1/PMMA倍頻訊號與濃度之關係
4.2 ASF/PMMA之電光係數
第五章 結論

[1.1] J. I. Thackara, G. F. Lipscomb, M. A. Stiller, A. J. Ticknor, and R. Lytel, “Poled electro-optic waveguide formation in thin-film organic media,” Appl. Phys. Lett. 52, 1988.
[1.2] Y. Shi, C. Zhang, H. Zhang, J. H. Bechtel, L. R. Dalton, B. H. Robinson, and W. H. Steier, “Low halfwave voltage polymeric electro-optic modulators achieved by controlling chromophore shape,” Science 288, pp. 119-122, 2000.
[1.3] T. I kato, N. Hirota, A. Fujishima, and Jean M. J. Frechet, “Supramolecular hydrogen-bonded liquid-crystalline polymer complexes design of side-chain polymers and a host-guest system by noncovalent interaction,” J. Poly. Sci. Part A: Poly. Chem. 34, pp. 57-62, 1996.