臺灣博碩士論文加值系統

在光纖中，偏振光往往較非偏振光容易受到干擾而產生變動，我們可以用光波去偏振的方法來改善輸出的穩定性。本文研究一種被動式光纖去偏振器將線偏振光轉換成非偏振光，由理論及計算探討其特性，我們發現Lutz及Lyot去偏振器分別對應於兩種極限情況的特解，而在一般情況下，由我們的計算結果可以得知最佳工作條件，作為設計及製作的參考。

In an optical fiber, polarized light is more easily disturbed than unpolarized light. In applications where unpolarized light can be used, the output stability can be improved by depolarization techniques. In this thesis, a passive depolarizer is studied theoretically and numerically. It has been found that Lutz's and Lyot's depolarizers correspond to two limiting cases in our analysis. In general cases, one can deduce from our results the optimal working conditions which are of primary importance in design and fabrication of a depolarizer.