本論文所設計之耦光元件以能運用微光學平台技術(Micro-
Optical Bench, MOB) 完成元件之製作為出發點，希望設計出具實用
價值之元件，因此才有平面式微柱狀梯度折射率透鏡(Planar Micro
Cylindrical Gradient-Index lens，PMC/GRIN Lens)與平面式微柱
狀高分子階變折射率透鏡(Planar Micro Cylindrical Polymer
Step-Index lens，PMCP/SI Lens)之構想。
雖然所設計出PMC/GRIN Lens 能有高達百分之八十以上的耦合效
率，但是考量了製作上的困難度與實用性，因此利用相同的概念設計
出PMCP/SI lens。PMCP/SI Lens 僅用三層的高分子膜即可達到將近
百分之四十左右的耦合效率，比起相同工作長度下（雷射二極體至單
模光纖之距離）之直接耦合方式還要高出百分之二十以上以上。
本篇論文利用二維耦合效率的方式大幅降低直接計算耦合效率
的時間，直接找出高分子膜層比例的趨勢，以及適用之曲率。

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