臺灣博碩士論文加值系統

在本論文中我們實際製作出單模光纖燒融式的極化分離耦合器。我們利用簡單的燒融拉伸方式穩定的製作極化分光器，使得輸出兩端的光纖極化狀況得以維持。在不改變機台原形及製程的情況下，巧妙的運用參數組合製作出此元件。其於輸出兩端的特性表現分別為極化分離率25.78dB及27.16dB，兩輸出阜的頻寬分別為27nm及37nm，而共同頻寬為14 nm，過量損耗為0.3dB左右。在全波數值模擬方法下，極化分光器的表現可被精確的模擬。我們也在量測及模擬結果上得到良好的吻合度。

A single-mode fused biconical 2×2 coupler for polarization beamsplitting is fabricated in this thesis. We use simple fused and tapered method to fabricate the polarization beamsplitter(PBS) stably, and then we can get polarization maintaining in the output fibers. Without changing the manufacturing process, we design the device with special combination of fabrication parameters. We have achieved an extinction ratio of 25.78dB at the throughput port and 27.16dB at the coupled port. A usable spectral window as broad as 37nm and 27nm with an extinction ratio larger than 15dB for both ports is obtained. The excess loss is about 0.3dB. Based on a full-wave numerical approach, the performance of the PBS can be well modeled. We get good agreement between the measured and simulated results.

第一章 序論…………………………………………………………………………1
1.1 研究背景與目的……………………………………………………………1
1.2 歷史回顧……………………………………………………………………2
1.3 論文大綱……………………………………………………………………2

第二章 表面積分方程法……………………………………………………………6
2.1 概論…………………………………………………………………………6
2.2 理論推演……………………………………………………………………6
2.3 數值程序……………………………………………………………………9

第三章 融燒式 2×2 光纖耦合器模擬結果………………………………………13
3.1 概論………………………………………………………………………．13
3.2 融燒程度…………………………………………………………………．13
3.3 場型分佈…………………………………………………………………．14
3.4 耦合功率與融燒程度之關係……………………………………………．15
3.5 Birefringence與極化效應之關係……………………………………．17
3.6 融燒程度與頻寬之關係…………………………………………………．18
3.7 結論………………………………………………………………………．19

第四章 極化分光器之實作與量測結果…………………………………………．35
4.1 概述………………………………………………………………………．35
4.2 光纖耦合融燒機…………………………………………………………．35
4.3 製作參數與過量損失之關係……………………………………………．36
4.4 極化分光器停火點方式選擇與製作……………………………………．40
4.5 極化量測配置與結果……………………………………………………．41
4.6 結論………………………………………………………………………．44

第五章 寬頻式分波多工器及雙窗式光纖耦合器之實作………………………．64
5.1 概論………………………………………………………………………．64
5.2-1 寬頻式分波多工器之應用與原理………………………………………．64
5.2-2 寬頻式分波多工器之實作與量測結果…………………………………．65
5.2-3 結論………………………………………………………………………．66
5.3-1 雙窗式光纖耦合器之應用與原理………………………………………．66
5.3-2 雙窗式光纖耦合器之實作與量測結果…………………………………．68
5.3-3 結論………………………………………………………………………．69

第六章 結論………………………………………………………………………．79
6.1 總結………………………………………………………………………．79
6.2 未來方向…………………………………………………………………．80

參考文獻……………………………………………………………………………．81

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