https://scholars.lib.ntu.edu.tw/handle/123456789/120119
標題: | 新型光纖通訊光纖與半導體元件(I) | 作者: | 楊志忠 | 公開日期: | 31-十月-2003 | 出版社: | 臺北市:國立臺灣大學光電工程學研究所 | 摘要: | 我們以週期性凹槽結構施壓於光纖,產生 長週期光柵的效果,由上下凹槽的齒凸相 對位置變化所帶來長週期光柵不同的效 果,我們斷定週期性凹槽結構施壓效果乃 為產生微彎曲,而非壓力產生折射率變化 之效果。 Periodical perturbations along an optical fiber can cause power coupling between the core mode and cladding modes for the applications of spectral filtering and derivative operations. Such perturbations can be generated through periodical loading on fiber. By applying loading onto fiber with two face-to-face, identical groove structures, it was found that the long-period grating effects were dependent on the relative phase of the two periodical corrugations. Particularly, when the relative phase was zero (crest-to-crest), spectral filtering effects disappeared completely. The comparisons of such results between the cases of jacketed and un-jacketed fibers led to the conclusion that geometric deformation, instead of direct pressure-induced effect, was the dominating mechanism for generating spectral filtering functions in the double-sided loading configuration. The same conclusion can be applied to a single-sided loading device. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/11222 | 其他識別: | 912215E002030 | Rights: | 國立臺灣大學光電工程學研究所 |
顯示於: | 光電工程學研究所 |
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