本論文在探討構裝蝶式雷射模組時光纖因雷射銲接後所產生的銲後位移問題，目前在構裝雷射模組時，大多使用雷射銲接技術，而由於銲接時在熔池附近材料會因高溫迅速熔融及凝固，導致熔池固化過程中出現非線性的殘留應力分佈，進而使原來對準好的光纖產生銲後位移(Post-Weld-Shift)，嚴重影響到構裝後模組的耦光效率。
研究減少銲後位移，提高產品的良率，是開發低成本高效能半導體雷射模組的重要課題。但在研究減少銲後位移時，首要工作便是建立一套能夠量測銲後位移的系統，本研究利用一組300倍的高倍率CCD與高解析度的影像擷取卡建立一套高倍數影像擷取系統，並利用AutoCAD 與 Labview 這兩套軟體來分析並量化量測出銲後位移值與補償。而本實驗的結果顯示出在蝶式雷射模組中，銲後位移造成光纖對準偏移的大小與方向可以量化量測與補償，而補償後的結果也可使蝶式雷射模組的耦光效率增量約3％~10％。因此本研究利用高倍數影像擷取系統的量測技術能提供銲後位移的量化量測與補償技術，使得高可靠度、高性能及低成本應用於光纖通訊系統的蝶式雷射模組生產技術成為可能。

We investigate the post-weld-shift(PWS) induced fiber alignment shift in butterfly laser packaging. For high-speed laser modules in lightwave communication systems, the butterfly laser modules are widely used. When laser welding is applied to assemble a butterfly package, it is usually necessary to have mechanical elements such as substrates, fiber ferrule, and clip of house materials to facilitate fiber handing and retention within the package. However, during the process, rapid solidification of the welded region and associated material shrinkage often cause a post-weld-shift between welded components. The PWS significantly affects the package yield.
A novel measurement and compensation technique employing a high-magnification camera with image capturing system (HMCICS) to probe the post-weld-shift (PWS) induced fiber alignment shifts in high-performance butterfly-type laser module packages is studied. The results show that the direction and magnitude of the fiber alignment shifts induced by the PWS in laser-welded butterfly-type laser module packaging can be quantitatively determined and then compensated. The increased coupling efficiency after this PWS compensation was from 3% to 10%. This HMCICS technique has provided an important tool for quantitative measurement and compensation to the effect of the PWS on the fiber alignment shifts in laser module packages. Therefore, the reliable butterfly-type laser modules with a high yield and a high performance used in lightwave transmission systems can be developed.

第一章 緒論 1
1-1 研究背景 1
1-2 研究目的 4
1-3 論文架構 5

第二章 雷射銲接系統與金相分析 7
2-1 雷射銲接原理 7
2-2 雷射銲接系統 8
2-3 金相分析 16
2-4 材料吸收率 18

第三章 蝶式雷射模組結構與構裝流程 20
3-1 蝶式雷射模組結構 20
3-1-1 內部結構 20
3-1-2 外部結構與尺寸 24
3-2 蝶式雷射模組構裝流程 26

第四章 銲後位移之量測與補償結果 36
4-1 銲後位移的原因 36
4-2 銲後位移量測系統與原理 37
4-2-1 高倍數影像擷取系統介紹 37
4-2-2 銲後位移量測原理 40
4-3 銲後位移的量測步驟 44
4-4 銲後位移補償研究 47
4-4-1 銲後位移補償技術 47
4-4-2 銲後位移補償結果 52
4-4-3 蝶式雷射模組金相分析結果 55
4-5 Y軸銲後位移模擬 56

第五章 結論與未來工作 59
5-1 結論 59
5-2 未來工作 60

參考文獻 61

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