三相交流電弧加熱系統的建構及應用於矽核光纖退火及漸細化製程

Abstract

在本論文中，受到許永霖學長設計的三電極熔接架構的啟發，為改善其無法持續輸出電弧的劣勢重新設計了直接以電源供應器驅動的三相交流電弧產生器，使其能夠持續放電至少一分鐘以上；並以其電極距離、工作頻率作為可控變數，能自由調整系統的輸出溫度，輔以電控移動平台，架設了一個能自行定義移動速度的矽核光纖退火系統。第三章內，討論了以此系退火後的矽核光纖通過拉曼光譜儀檢驗其結晶度及應力狀態，作為評斷退火後樣本品質的一項根據，依此和過去雷射退火的實驗數據相互比較討論。第四章主要闡述光纖拉伸之形狀的理論以及其參數，並微調上述退火系統的參數，將其使用於漸細化光纖的製作。

In this work, inspired by the tricyclic fusion splicer built by the ex-teammate Yung-Lin Hsu, we redesign a 3-phase alternative current arc generator driven by the power supply. Thus, the problem of not being able to continuously provide arc was solved. The new system could remain the arc discharging for over 1 minute. The gap between the electrodes and the working frequency were also adjustable and would influence the output heating temperature of the system. Then, adding a translation stage with a fiber clamp to the system, a programmable annealing system was built. By changing the moving speed, different samples of annealed silicon-cored fibers were made. The Raman spectrometer were used to evaluate the samples after annealing, since the crystallinity and stress could be told from the spectra. The data were then compared with the old data, the Raman spectra of the samples annealed by CO2 laser. In chapter 4, we mainly reviewed the theory of fiber tapering and the important parameters. Based on the annealing system, parameters were slightly adjusted in order to produce tapered fibers.