| Summary: | 碩士 === 國立交通大學 === 光電工程研究所 === 84 === Liquid crystal based fiber components, exploiting the high
birefringence and electrooptic effect of liquid crystals, are
versatile. A single-mode fiberenclosed with planar aligned
liquid crystals is reported in this thesis. The fiber was
etched to approach its core. The output light was affected
through the evanescent field coupling between the fiber and the
surrounding liquid crystals. To effectively approach the
evanescent field, the orientation of liquid crystal and the
etched depth of fiber were studied first. When the fiber was
etched within 10 microns diameter to its core, light leakage was
obviously observed. Once the electric field added on pre-
aligned liquid crystal which was cladded on an etched fiber
was switched on, the polarizationselection and intensity
modulation of the fiber's throughput power were exhibited.
A theoretical description of the optical characteristics of the
present samples was also given.
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