多區光柵介電質波導之特性分析

Study for Multi-regions of Gratings in Optical Dielectric Waveguides

何宗晏(Tsum-Yen He)

指導教授 ： 孫迺翔

義守大學/電機資訊學院/電機工程學系/碩士(2014年)

https://doi.org/10.6343/ISU.2014.00297

摘要

本論文針對多區光柵介電質波導的傳輸反射頻譜作分析，我們模擬兩組不同週期的光柵並列在一起，求得傳輸反射頻譜；再來我們提出一種新結構，其結構是在兩光柵中間加一層虛擬的非光柵層的結構，成功使得傳輸與反射功率有能量守恆。接著針對光柵區內的功率計算方式，我們提出三種方法A、B、C，並從中得到誤差最小為方法B。我們也成功的將原本的雙區結構複製10、20、40層，去與單區光柵頻譜作比較，在共振區內一樣有Phase-shift，而40區的趨勢與單區最為相似。最後我們固定短週期光柵，去改變長週期光柵的週期，而光柵週期越長，在頻譜中就會看見兩個共振區越分越開，當兩光柵週期相差很遠時，合併的效果就越小。

關鍵字

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並列摘要

In this thesis, we analyze the transmission and reflection spectrum of a multi-region grating structure of optical dielectric waveguides. We obtain the transmission and reflection spectrum of gratings with two grating periods. To analyze the spectrum and conservation of energy, a new structure is analyzed in this study. We propose a non-grating region located between two grating regions, where the length of the non-grating region set to zero. Three methods are used to calculate the power in the grating region. The grating structure with 2, 4, 10, 20, and 40 regions are simulated to obtain the transmission and reflection efficiencies. Finally, we increase the distance of two grating periods. It shows that when the difference of two grating periods is very small, the spectrum is similar to one grating structure except the phase shift occurs at the central resonant wavelength.

並列關鍵字

none

參考文獻

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