運用電弧加工法於相位偏移光纖光柵之製作與研究

The study on the fabrication of phase shift fiber bragg grating using arc discharge technique

饒堃樑(Kun- Liang Jao)

指導教授 ： 鄭旭志

國立虎尾科技大學/電機資訊學院/光電與材料科技研究所/碩士(2010年)

摘要

光纖光柵(Fiber Bragg Grating, FBG)被廣泛的使用在光纖通訊系統以及光纖感測系統上，其中布拉格光纖光柵在最近的十幾年中快速地發展，該最主要的功能是做為光的濾波器。由於布拉格光纖光柵具有低損耗、不受電磁干擾、成本低廉等優點，所以在目前已經被大量應用在光纖通訊及光纖感測等方面。
在本論文中，將探討已寫置完成的光纖光柵進行二次加工，利用一種新穎的方法來製造相位移光纖光柵(phase shifted FBG)或超結構光纖光柵(Superstructure FBGs)，特別是，在這裡將使用電弧放電(electric arc discharge)來實現光纖光柵結構的局部缺陷化。藉由簡單的電弧放電加工程序並且選擇適當的放電參數來製作相位偏移式光纖光柵，並研究其加工參數，如放電強度、放電時間、放電位置與加工後缺陷結構影響相位偏移光纖光柵的頻譜變化。最後，我們提供了幾個模擬數據和實驗結果證明單缺陷與多缺陷結構可產生相位偏移光纖光柵，或者超結構光纖光柵。

關鍵字

光纖光柵 ； 相位移光纖光柵 ； 電弧加工

並列摘要

Fiber Bragg grating (FBG) is widely used in fiber communications system and fiber sensors system. Recently, fiber Bragg grating quickly developed as the optical filter. Fiber Bragg grating have several advantages over conventional electrical devices such as compact in size, robust, chemically inert, low loss, low cost, nonconductive and are immune to electromagnetic interference (EMI).
In this thesis, we proposed a simple method to manufacture phase shifted FBG or super-structure FBG. The electric arc discharge technology is used to achieve localized defect in the FBG structure. The appropriate parameters such as arc discharge intensity, duration and arc discharge location were chosen to change the effective refractive index of FBG by using simple electrical arc discharge method. The relationship between phase shift fiber Bragg grating (PS-FBG) and these parameters was also investigated in this article. Finally, we provide several experimental results of PS-FBG and compare to the numerical simulation results by using transfer matrix method. These results demonstrate that the arc discharge method can be manufacture PS-FBG and superstructure FBGs.

並列關鍵字

Fiber Bragg grating ； phase shift fiber Bragg grating ； arc discharge technique

參考文獻

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