中文摘要
本論文提出新型四角錐形光纖透鏡之架構及研製。四角錐形光纖之製程：(1)首先以θ斜角研磨至光纖軸心、(2)然後沿光纖軸心旋轉φ角並研磨至光纖軸心、(3)最後沿光纖軸心轉π-φ角及(4)轉φ角重複研磨至光纖軸心。將所研製四角錐形光纖之尖端以光纖熔接機燒成具橢球曲面之四角錐形光纖透鏡架構，此架構之光纖透鏡適合跟980nm高功率雷射相匹配，目前所研製之新型四角錐形光纖透鏡與高功率980nm幫浦雷射之耦合效率可高達85%以上。

Abstract
We propose a new scheme of lensed fiber employing a quadrangular-pyramid-shaped fiber endface (QPSFE) for the coupling high-power 980nm laser diodes and single-mode fibers. The quadrangular-pyramid-shaped fiber was accomplished by first grinding and polishing a flat surface to the center of fiber at the desired inclination angle of θ, rotating the fiber to φ and polishing to the center of fiber, repeating the same process on the other sides of the fiber by rotating the fiber to π-φ and φ. Then the QPSFE was fabricated by heating the tip of quadrangular-pyramid-shaped fiber in a fusing splicer to form an elliptical microlens endface. A coupling efficiency of 85% has been demonstrated. This higher coupling efficiency of the QPSFE lensed fiber is attributed to the better matching of the elliptical Gaussian field distribution between the laser source and the fiber.

內容目錄
頁次
中文摘要 Ⅰ
英文摘要 Ⅱ
致謝 Ⅲ
內容目錄 Ⅳ
圖表目錄 Ⅶ
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 2
第二章 文獻回顧與理論基礎 3
2-1. 文獻回顧 3
2-1-1. 980nm幫浦雷射模組簡介 3
2-1-2. 光纖透鏡文獻回顧 4
2-2. 理論基礎 5
2-2-1. 高斯光束與模態耦合理論 5
2-2-2. 耦光效率的計算 8
2.3. 四角錐形光纖透鏡 9
第三章 四角錐形光纖透鏡的製作 19
3-1. 光纖研磨系統 19
3-2. 四角錐形光纖透鏡之製程 19
3-2-1. 四角錐形光纖研磨參數設定 20
3-2-2. 四角錐形光纖的研製 21
3-2-3. 四角錐形光纖透鏡之製作 23
3-3. 四角錐形光纖研磨結果 24
第四章 980nm幫浦雷射與單模光纖耦合效率的量測 37
4-1. 雷射特性量測 37
4-1-1. 量測雷射功率-電流曲線 37
4-1-2. 雷射光場的量測 38
4-2. 四角錐形光纖透鏡特性之量測 38
4-2-1. 四角錐形光纖透鏡外觀之量測 38
4-2-2. 四角錐形光纖透鏡遠場光場之量測 39
4-3. 耦光效率量測 40
第五章 結論及未來工作 48
5-1. 光纖透鏡的製作 48
5-2. 耦光效率 48
5-3. 未來工作 49
參考資料 50

1. S.Y. Huang, C.E. Gaebe, K.A. Miller, G.T. Wiand, and T.S. Stakelon, “High Coupling Optical Design for Laser Diodes with Large Aspect Ratio”, Electronic Components and Technology Conference, 1999. 1999 Proceedings. 49th, pp. 912 -915, 1-4 June 1999.
2. Z.L. Liau, J.N. Walpole, J.C. Livas, E.S. Kinterz, D.E. Mull, L.J. Misaggia, and W.F. DiNatale, “Fabrication of Two-Sided Anamorphic Microlenses and Direct Coupling of Tapered High-Power Diode Laser to Singlemode Fiber”, Photonics Technology Letters, IEEE , Vol. 7, pp. 1315 -1317, Nov. 1995.
3. V.S. Shah, L. Curtis, R.S. Vodhanel, D.P. Bour, and W.C. Yang, “Efficient Power Coupling from 980nm, Broad-Area Laser to Single Fiber Using a Wedge-Shaped Fiber Endface”, J. Lightwave Technology, Vol. 8, pp. 1313 -1318, Sept. 1990.
4. R.A. Modavis, and T.W. Webb, “Anamorphic Microlens for Laser Diode to Singlemode Fiber Coupling”, Photonics Technology Letters, IEEE , Vol. 7, pp. 798 -800, July 1995.
5. H. Yoda, and K. Shiraishi, “A New Scheme of a Lensed Fiber Employing a Wedge-Shaped Graded-Index Fiber Tip for the Coupling Between High-Power Laser Diodes and Singlemode Fiber”, J. Lightwave Technology, Vol. 19, pp. 1910 -1917, Dec. 2001.
6. V.S. Shah, L. Curtis, R.S. Vodhanel, D.P. Bour, W.C. Young, “Efficient Power Coupling from a 980-nm, Broad-Area Laser to a Single-Mode Fiber Using a Wedge-Shaped Fiber Endface”, J. Lightwave Technology, Vol. 8, pp. 1313 -1318, Sept. 1990.
7. R.A. Modavis, T.W. Webb, “Anamorphic Microlens for Laser Diode to Single-Mode Fiber Coupling”, Photonics Technology Letters, IEEE , Vol. 7, pp. 798 -800, July 1995.
8. W. Joyce, B. De Loach, “Alignment-Tolerant Optical-Fiber Tips for Laser Transmitters”, J. Lightwave Technology, Vol. 3, pp. 755 -757, Aug 1985.
9. C.A. Edwards, H.M. Presby, C. Dragone, “Ideal Microlenses for Laser to Fiber Coupling”, J. Lightwave Technology, Vol. 11, pp. 252 -257, Feb. 1993.
10. Y. Irie, J. Miyokawa, A. Mugino, T. Shimizu, “Over 200 mW 980 nm Pump Laser Diode Module Using Optimized High-Coupling Lensed Fiber”, Optical Fiber Communication Conference, 1999, Vol. 2, pp.238 -240, 21-26 Feb. 1999.
11. Bahaa E. A. Saleh, Malvin Carl Teich, “Fundamentals of Photonics”, John Wiley & Sons, 1991, p.83