臺灣博碩士論文加值系統

本論文為光纖光柵穩定980nm幫浦雷射光譜特性之研究，首先提出新型四角錐形光纖研磨製程，降低研磨時間，並在完成四角錐形光纖後，將尖點去除，此關鍵製程使得與雷射耦合效率達到70%以上的四角錐形光纖透鏡，可提升20%的良率。利用研製四角錐形光纖透鏡與高功率980nm幫浦雷射耦光，將6%、8%、10%等不同反射率之光纖光柵置於雷射前端2.5m處形成一個外部回饋共振腔，使溫度對波長及電流對波長的穩定性分別提升至少60倍及30倍。本文亦利用雷射速率方程式及光纖光柵理論建立模擬模型，在定性上，的確可以看到波長穩定的效果。本文最後利用雷射銲接技術構裝980nm幫浦雷射蝶式模組。

The spectral characteristics of fiber grating-stabilized 980nm pump lasers were studied theoretically and experimentally. A new process of fiber tip flattening making quadrangular-pyramid-shaped fiber lens (QPSFL) was successfully developed. This fiber tip flattening process can improve the yield fabricating QPSEL up to 20% compared with the previous research of the process without tip flattening. The QPSFL was used in coupling between the high-power 980nm laser diodes and the single mode fibers (SMFs). A fiber grating was fused at the end of the single mode fiber. The reflectivity of fiber gratings were 6%, 8% and 10%, and the length of the external cavity was about 2.5m. The measured result showed that the stability of temperature to peak wavelength and driving current to peak wavelength were improved 60 and 30 times, respectively. A theoretical modeling which combined the laser rate equation and the grating theory was successfully developed as well. The qualitative analysis of the numerical simulation showed that the peak wavelength would be locked in the reflection spectrum of the fiber grating. On the other hand, we have also finished packaging a butterfly 980nm pump laser module by the laser welding technology.

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 光纖光柵外部回饋理論模擬 5
2-1 雷射震盪與熱效應 5
2-2 光纖光柵外部回饋與熱效應 7
2-2-1 光纖光柵理論 7
2-2-2 外部回饋 7
2-2-3 熱效應 9
2-3 多模態雷射速率方程式 10
2-3-1 FP雷射的多模態雷射速率方程式 10
2-3-2 光纖光柵外部回饋之速率方程式 11
2-3-3 模擬結果討論 12
第三章 四角錐形光纖透鏡的製作 22
3-1 研磨 23
3-2 去尖點 25
3-3 微熔燒 25
3-4 四角錐形光纖研磨結果 26
第四章 980nm幫浦雷射外加光纖光柵量測 34
4-1 元件特性 34
4-1-1 980nm幫浦雷射 34
4-1-2 980nm單模光纖 34
4-1-3 光纖光柵 35
4-2 實驗架構 35
4-3 980nm幫浦雷射外加光纖光柵量測結果 36
4-3-1 FP雷射的光譜特性 36
4-3-2 溫度與波長飄移關係 37
4-3-3 電流與波長飄移關係 37
4-3-4 功率-電流分析 38
第五章 980nm幫浦雷射構裝 52
5-1 蝶式模組構裝 52
5-1-1 重要元件介紹 52
5-1-2 蝶式模組構裝流程 53
5-2 結果分析 54
第六章 結論及未來工作 59
6-1 結論 59
6-2 未來工作 60
參考資料 61

1.G.P. Agrawal, “Fiber-optic communication systems”, New York : Wiley-Interscience, 2002
2.Roland Diehl(Ed.),“High-power diode lasers fundamentals, technology, applications”, New York : Springer, 2000
3.Randal Salvatore, Thomas Yang, and David Loeber, “Fiber-Bragg-stabilized lasers power amplifiers for DWDM”, Laser Focus World, pp.113-118, 1999
4.B.F. Ventrudo, G.A. Rogers, G.S. Lick, D. Hargreaves and T.N. Demayo,“Wavelength and intensity stabilisation of 980nm diode lasers coupled to fiber Bragg gratings”,Electronics Letters, vol.30, pp.2147-2149, 1994
5.D.M. Byrne, Donald MacLean, and Richard Plumb,“Optical feedback-induced noise in pigtailed laser diode modules”,IEEE Photonics Technology Letters, vol.3, pp.891-894, 1991
6.K.O. Hill, B. Malo, F. Bilodeau, D.C. Johnson, and J. Albret,“Bragg gratings fabricated in monomode photosensitive optical fiber by UV exposure through a phase mask”, Applied Physics Letters, vol.62, pp.1035-1037, 1993
7.Turan Erdogan,“Fiber grating spectra”, J. Lightwave Technology, vol.15, pp.1277-1294, 1997
8.M. Achtenhagen, S. Mohrdiek, T. Pliska, N. Matuschek, C. S. Harder, and A. Hardy,“L-I characteristics of fiber Bragg grating stabilized 980nm pump lasers”, IEEE Photonics Technology Letters, vol.13, pp.415-417, 2001
9.K.Petermann, “Laser diode modulation and noise”, Norwell, MA: Kluwer,1991
10.T.S. Lay, M.H. Chen, H.M. Yang, S.H. Wu and W.H. Cheng, “1.55um non-anti-reflection-coated fiber grating laser for single-longitudinal mode operation”, Optical and Quantum Electronics, vol.34, pp.687-696, 2002.
11.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 single mode fiber”, J. Lightwave Technology, vol. 19, pp. 1910 -1917, 2001.
12.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, 1990.
13.R.A. Modavis, T.W. Webb, “Anamorphic microlens for laser diode to single-mode fiber coupling”,IEEE Photonics Technology Letters, vol. 7, pp. 798-800, 1995
14.S.-M. Yeh, Y.-K. Lu, S.-Y. Huang, H.-H. Lin, C.-H. Hsieh, and W.-H. Cheng, “A novel scheme of lensed fiber employing a quadrangular-pyramid-shaped fiber endface for coupling between high-power laser diodes and single-mode fibers”, J. Lightwave Technology, vol.22, pp. 1374-1379, 2004.
15.Stefan Mohrdiek, Martin Achtenhagen, Christoph Harder, “Detuning characteristics of fiber Bragg grating stabilized 980nm pump lasers,”in Proc. OFC Conference,ThK5-1,pp.168-170,2000
16.呂昱寬, “新型四角錐形光纖透鏡”,國立中山大學碩士, 2003
17.黃胤年, “簡易光纖通信”,五南圖書出版公司,2002
18.陳明鴻, “無鍍抗反射膜光纖光柵雷射光譜特性之研究”,國立中山大學碩士, 2001
19.黃韋凱,“2.5-10Gb/s 高速蝶式半導體雷射模組銲後位移之研究”, 國立中山大學碩士, 2003