INVESTIGATION AND IMPLEMENTATION OF INTEGRATED-OPTICS LIQUID CRYSTAL POLYMER OPTICAL SWITCH

• Main Authors: Chan, Yi-Chien, 詹益謙
• Other Authors: Wei-Yi Lee
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/96607481809760783611

碩士 === 大同工學院 === 電機工程學系 === 85 === ABSTRACTThe control of light in thin dielectric waveguides has attracted considerable attention trom practical points of view such as data processing and communication in integrated optical device. Coupler and switch have long been subjects of interest in the field of integrated optics.For the conventional directional coupler, the long coupling length, switching length (~mm) and high temperature and long time manufacture will lead to a high cost. With the advantages of the large birefringence of liquid crystals, we designed a vertical directional coupler, and switch with short switching length. The operation of the device was different from the traditional coupled mode theory; instead, we proposed the method, which the guided mode crossed the coupling layer directly, to exchange energy.In experiment, PMMA materials which are easy to prepare, low cost, and can be fabricated on many kinds of substrates are served as waveguide on ITO glass or substrate. And the material makes cleaving easily for the device. Thus end-fire which is helpful for integrated-optic can be implemented. Beside, inverted-rib waveguides on and ITO glass substrate are also fabricated, measured and discussed. To fabricate the liquid crystal switch with inverted-rib waveguides is implemented. The procedure are described in detail in this thesis.