臺灣博碩士論文加值系統

中文摘要
本文的主旨在運用非線性迴歸(nonlinear regression)分析，模擬推算出雷射光點強度極大值的位置。過程中以LabVIEW語言建構出程式。內容除了雷射光點極大值位置的推算之外，還包括雷射與光纖對準時所造成的偏移誤差(misalignment)之分析，噪音強度對偏移誤差的影響之討論，以及因偏移誤差所造成的耦合損失之計算。此結果可應用於光收發器製程中半導體雷射與光纖耦合之對準。

Abstract
In this study, a nonlinear regression method was used to predict the location where the intensity of a laser spot would be at its maximum. A LabVIEW program was designed to calculate the location of the maximum. Besides, the misalignment between the laser and the optical fiber was analyzed. The effect of random noise on the misalignment and the coupling loss due to it were also discussed.
This results can be utilized in the alignment of the semi-
conductor laser and the optical fiber during the manufacturing of the optical transceiver.

目錄
頁次
中文摘要…………………………………………………………………i
英文摘要…………………………………………………………….…...ii
謝辭……………………………………………………………………...iii
目錄……………………………………………………………………...iv
圖表目錄……………………………………………………………...…..vii
第一章 緒論……………………………………………………………1
1-1 研究動機……………………………………………………….1
1-2 研究目的……………………………………………………….4
第二章 高斯函數特性與非線性迴歸分析法之應用…………………6
2-1 非線性迴歸分析法及最小平方法………………………….6
2-2 雷射光點之強度分佈……………………………………...7
2-2-1高斯函數之擬合曲線特性…………………………...8
2-3 噪音之直方分佈………………………………………….. 9
2-4 非線性迴歸分析法於光軸對準之應用…………………...10
第三章 非線性迴歸分析於光纖對準之模擬………………………. 14
3-1 LabVIEW….………………………………………………..14
3-1-1 LabVIEW簡介………………………………………..14
3-1-2 LabVIEW工作環境…………………………………..15
3-1-3 LabVIEW的特色………………………………..……16
3-2 模擬程式之參數設定……………………………………... 17
3-2-1 單模光纖………………………………………….…17
3-2-2 雷射二極體………………………………………… 18
3-2-3 噪音………………………………………………….21
3-2-4 截止值…………………………………………….....21
3-3 耦合損失之計算………………………………………….. ..22
3-3-1 模態不匹配的影響………………………………….23
3-3-2 偏移誤差的影響…………………………………….23
3-3-3 軸向位移（axial displacement）的影響……….24
3-4 模擬程式……………………………………………………24
第四章 模擬結果……………………………………………………..33
4-1 參考點間距對偏移誤差之影響…………………………... 34
4-2 噪音強度對偏移誤差之影響………………………………35
4-3 噪音強度對耦合效率之影響………………………………36
4- 4 噪音強度對計數之影響……………………………………37
第五章 總結與未來工作……………………………………………..42
5-1 總結……………………………………………………. …..43
5-2 未來工作……………………………………………………48

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