利用極化控制器控制傾斜布拉格光纖光柵特性之量測

Measurement of Tilted Fiber Bragg Gratings using polarization controller

趙文祺(Wei-Chi Chao)

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(2016年)

摘要

本篇論文主要是使用極化控制器連結布拉格光纖光柵(Fiber Bragg Gratings, FBGs)量測一階FBGs、Tilted FBGs(TFBGs)和二階FBGs 的傳輸、反射與輻射頻譜。我們先分析一階無傾斜FBGs，發現改變極化方向對於傳輸、反射與輻射效率沒有影響，接著分析一階TFBGs 傾斜角度1°、3°與45°光纖光柵的傳輸、反射與輻射效率，發現在傾斜1°與45°光柵加上極化控制器之後輻射效率分別有5.55dB 與5.88dB 的能量變化。其中TFBGs 的輻射效率最大變化量為6.25dB。另外，我們量測二階FBGs 的輻射效率與角度關係，發現在角度45°、90°和135°附近有輻射效率最大值，其中能量以角度135°位置為最大，而在傳輸效率下降之前的位置會在角度135°時有最大輻射效率-26.70dB。

關鍵字

極化控制器 ； 布拉格光纖光柵 ； 輻射

並列摘要

The transmission, reflection and radiation spectrum of fiber Bragg gratings (FBGs) with a polarization controller are measured in this thesis, where FBGs include first-order FBGs, tilted FBGs (TFBGs) and second-order FBGs. The experimental results show that polarization controllers do not affect the properties of FBGs. However, the radiated efficiencies increase 5.55dB and 5.88dB by a polarization controller for 1° and 45° TFBGs, respectively. The maximum radiation efficiency of TFBGs can reach 6.25dB. In addition, we measured the radiation efficiency as a function of an angle for second-order FBGs. We find the radiative angles of second-order FBGs are near 45°, 90° and 135°, where the maximum radiated angle is 135°. In this study, the maximum radiation efficiency at 135° is -26.70dB and occurs at the short wavelength side boundary of the resonant region.

並列關鍵字

polarization controller ； Fiber Bragg Gratings ； radiation

參考文獻

[16] 雷士慶 著，一階傾斜光纖光柵之量測與分析，義守大學電機工程學系碩士論文，中華民國103年

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