在此篇論文中，我們利用中空光纖來製作嵌入式電極光纖且其纖芯可置入不同功能性的電光材料。我們利用蒸鍍的方式將電極嵌入在光纖中，不僅大幅地縮小電極的體積且將製程的步驟簡單化。在眾多電光材料中，我們選擇液晶作為此嵌入式電極光纖之纖芯材料，並摻雜其他低折射率的材料以降低纖芯之折射率，當外加電壓時，向列型液晶的導軸會沿著電場排列且纖芯的折射率會低於包層的折射率，便破壞了全反射現象，導致纖芯的光部分折射至包層中，且纖芯的功率大幅下降約50～70％。除此之外，此技術可以被應用於製作其他電光材料為纖芯的嵌入式電極光纖，並有潛力發展許多具有獨特性能的電調控光電光纖元件。

In this letter, we demonstrate a way to make liquid crystal-filled hollow-core optical fibers with silica glass cladding and metal electrodes embedded between cladding and coating. We embed the electrode in the fiber by using vapor deposition and this way not only greatly reduce the volume of the electrode, but also simplify the postprocess. Among the many electro-optic material, we choose liquid crystal as the material of embedded electrode optical fiber core and doped with other material to reduce the refractive index of the core.If some voltage isapplied to the electrode, the nematic LC director aligns along the direction of the applied electric field and breaks the total reflection rules. So that the light in the core will refract to the cladding and the power of the core will decrease about 50% to 70%. Furthermore, the technique can be applicable to make other electro-optic materials core optical fibers with metal-embedded electrodes, which could potentially enable many electrically tunable fiber devices along with the unique property of the electro-optic materials core.

論文審定書(中文) i
論文審定書(英文) ii
誌謝 iii
中文摘要 iv
Abstract v
目錄 vi
圖目錄 viii
表目錄 x
第一章序論 1
1.1 前言：1
1.2 研究目的： 2
1.3 本文架構： 2
第二章基本原理 3
2.1 液晶之簡介 3
2.1.1 液晶的分類 4
2.1.2液晶的物理性 5
2.2 實驗理論基礎 11
2.2.1樣品間隙厚度量測之原理 11
2.2.2穿透率量測原理 12
第三章樣品配製與實驗架設 18
3.1 向列型液晶材料E7介紹 18
3.2設備介紹 19
3.3實驗方法 21
3.3.1樣品製程 22
3.3.2實驗光路架設 27
3.3.3液晶光纖與電極製作 28
3.3.3液晶光纖之功率量測 31
第四章實驗結果與討論 32
4.1 液晶盒的特性分析 32
4.2液晶光纖的特性分析 35
4.2.1探討液晶在HOF內之分佈 35
4.2.2液晶光纖之功率量測分析 37
第五章結論 39
參考文獻 39

[1]K. Takizawa, Opt. Lett. 11, 818 (1986).

[2]Y. Xu, Ferroelectric Materials and Their Applications, Elsevier(1991).

[3]M. Fokine, L. E. Nilsson, Å. Claesson, D. Berlemont, L. Kjellberg, L.Krummenacher, and W. Margulis, Opt. Lett. 27, 1643 (2002).

[4]A. Bhatti, H. S. Al-Raweshidy, and G. Murtaza, Antennas and Propagation Society International Symposium , IEEE, 1, 674-677(1999).

[5]鄭作仲,"水平配向液晶盒純相位調制應用於移相式全像術之研究",國立成功大學碩士論文 (2008).

[6]Iam-Choon Khoo,Liquid Crystal-Physical Properties and Nonlinear Optical Phenomena, John Wiley& Sons Press, New York(1997).

[7]I. C. Khoo and F. Simoni, Physics of Liquid Crystalline Materials, Gordon and Breach, Philadelphia(1988).

[8]P. C. Yeh and C. Gu, Optics of Liquid Crystal Displays, John Wiley & Sons Press, New York (1997).

[9]王珍珍, "混合聚亞醯胺配向膜調控液晶預傾角之研究與應用",國立成功大學, 光電科學與工程研究所(2008).

[10]林良真, “使用雙面光配向技術製作高效率與偏振無關的染料摻雜液Fresnel光學透鏡”,國立成功大學, 物理研究所(2007).

[11]Berreman D W, Phys. Lett. 28,1683 (1972).


[12]Wayne M. Gibbons, Paul J. Shannon, Shao-Tang Sun & Brian J. Swetlin, Nature 351, 49-50 (1991).

[13]Martin Schadt, Klaus Schmitt, Vladimir Kozinkov and Vladimir Chigrnov, Jpn. J. Appl. Phys., 31, 2155 (1992).

[14]O. Yaroshchuk, L. G. Cada, M. Sonpatki, and L. –C. Chien, Appl. Phys. Lett., 79, 30(2001).

[15]M. Hasegawa and Y. Taira: J. Photopolym., Sci.Tech.8, 703(1995).

[16]Michinon Nishikawa, Tamas Kosa and John L. West., Jpn. J. Appl. Phys., 38,344 (1999).

[17]Eugence and Hecht, Optics, Addison-Wesley, Canada (1987).

[18]Yoonchan Jeong, Byungchoon Yang, Byoungho Lee, Hong Seok Seo, Sangsoo Choi, and Kyunghwan Oh, “Electrically Controllable Long-Period Liquid Crystal Fiber Gratings”, IEEE Photon. Technol. Lett., 12, 5,519-521(2000).

[19]Thomas Tanggaard Alkeskjold, Jesper Lægsgaard and Anders Bjarklev, “All-optical modulation in dye-doped nematic liquid crystal photonic bandgap fibers”, OSA, 12, 24, 5857-5871 (2004).

[20]P. G. de Gennes and J. Prost, The Physics of Liquid Crystals, Clarendon Press, Oxford (1993).

[21]M. Green and S. J. Madden, “Low loss nematic liquid crystal cored fiber waveguides”, Appl. Opt., 28, 5202–5203 (1989).

[22]Iam-Choon Khoo, Liquid Crystal, John Wiley & Sons Press, New York (1994).