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博碩士論文 etd-0706107-201806 詳細資訊
Title page for etd-0706107-201806
論文名稱
Title
利用雙曲線漸變折射率光纖端面之雷射與光纖耦光
Laser Diodes to Single-Mode Fibers Coupling Employing a Hyperbolic-Shaped Graded-Index Fiber Endface
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
64
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2007-06-24
繳交日期
Date of Submission
2007-07-06
關鍵字
Keywords
雙曲線、容忍度、耦光、工作距離
working distance, hyperbolic, coupling, tolerance
統計
Statistics
本論文已被瀏覽 5718 次,被下載 2810
The thesis/dissertation has been browsed 5718 times, has been downloaded 2810 times.
中文摘要
本篇論文提出一種同時具有高耦合效率、工作距離長、以及對準容忍度佳等優點之新型光纖架構。此架構係將單模光纖(SMF)前端接上一段纖核直徑為50μm漸變折射率光纖(GIF)。並且在GIF前端製作雙曲線透鏡。雙曲線透鏡能將雷射波前轉換為平面波,且利用GIF的聚焦特性,因此能有效提高SMF耦光效率。
根據模擬結果,最佳GIF長度為1160μm。雷射發光功率操作在10mW及光纖透鏡曲率半徑為12.74μm下,此新型光纖結構之耦光效率可達77%,工作距離為16μm。此光纖之橫向與縱向對準容忍度為0.8μm與1.3μm。本架構與傳統的單模光纖透鏡相較下,具有較長的工作距離以及較佳的光纖對準容忍度,因此應用於雷射磨組構裝中可以提升構裝良率與降低製造成本。
Abstract
In this thesis, a novel fiber structure with advantages of high coupling efficiency, long working distance and better alignment tolerance has been presented. In this structure, the front-end of the singe-mode fiber (SMF) was spliced a graded-index fiber (GIF) with 50μm core diameter. A hyperbolic-shaped lens was fabricated in the front-end of GIF. This novel fiber structure can increase the coupling efficiency of SMF effectively by using the wavefront-transfer characteristic of hyperbolic-shaped lens and the focusing characteristic of GIF.
According to the simulation results, the optimized length of the GIF was 1160μm. This novel fiber structure can reach to the coupling efficiency of 77% and working distance of 16μm when the output power of laser diode was operated at 10mW and the radius curvature of lensed fiber was 12.74μm. The lateral and longitudinal alignment tolerances of this fiber were 0.8μm and 1.3μm, respectively. In comparison with the conventional SMF lens, this novel fiber structure has longer working distance and better fiber alignment tolerance. Therefore, this structure can increase the package yield and reduce the fabrication cost for the application of laser module package.
目次 Table of Contents
中文摘要 I
Abstract II
誌謝 III
內容目錄 IV
圖表目錄 VI
第一章 緒論 1
1-1 研究背景 1
1-2 研究目的 2
1-3 論文架構 3
第二章 波前形狀轉換理論 6
2-1 光纖的分類 6
2-2 理論基礎 7
2-2-1 高斯光束與波前耦合理論 7
2-2-2 雙曲型光纖透鏡 9
第三章 新型光纖透鏡的製作 18
3-1 光纖熔接 19
3-2 光纖切割 20
3-3 光纖蝕刻與熔燒 20
第四章 雷射二極體與光纖耦光的量測 29
4-1 元件特性 29
4-1-1 Fabry-Perot 雷射二極體 29
4-1-2 光纖介紹 29
4-2 雙曲型光纖透鏡之量測 29
4-2-1 光纖透鏡外觀之量測 29
4-2-2 光纖透鏡遠場光場之量測 30
4-3 耦光功率量測 31
4-3-1 實驗架構 31
4-3-2 量測結果 31
第五章 結論與未來工作 49
5-1 結論 49
5-2 未來工作 50
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