光纖頭套端面研磨機之系統化設計

On the Systematic Design of Optical Fiber End-face Polishing Device

王志益(Zhi-Yi Wang)

國立虎尾科技大學/工程學院/動力機械工程研究所/碩士(2005年)

摘要

大量資訊的相互傳輸下，傳統的銅纜線已不敷使用，使得光纖通訊成為
資訊傳輸的主流。光讖的傳輸主要是靠著連接器作為傳輸的接續元件，而
連接器中的光纖頭套是影響光傳輸的關鍵。光纖頭套的特性要求為低的插
入損失 (Insertion Loss) 與高的反射損失 (Return Loss)。而兩光纖在對接時，常
因端面幾何形狀的差異，造成不良品的產生，使得光訊號的傳遞嚴重衰減。
所以光纖頭套端面的研磨拋光是非常重要的。
光纖頭套端面研磨機之機構，可分成行星齒輪系與連桿機構兩大類。行
星齒輪系研磨機所產生之研磨軌跡為甜甜圈式軌跡 (donut-shaped locus),其
研磨墊使用率較低。另一連桿機構研磨機所產生的軌跡為 8 字形軌跡。而 8
字形軌跡以兩個正圓所組成的 8 字形軌跡較佳，配合進給機構的使用，可
提高研磨片的使用率。
本文之目的為分析這兩類機構的研磨軌跡之曲率以及速度偏差百分比
等參數，以設計出更佳的光纖頭套端面研磨機。在行星齒輪系研磨機方面，
本文分析與推導研磨軌跡和速度與加速度之運動特性方程式，從中瞭解設
計參數對光纖頭套端面研磨之影響，然後，以光纖研磨機之研磨速度為基
準，計算出速度偏差百分比並以此為設計參數。最後，利用前面分析所獲
得之結論，設計出速度偏差百分比最小之行星齒輪系光纖頭套端面研磨
機。在連桿機構研磨機部分，本文針對研磨機所使用的七桿八接頭連桿機，
主使用顏氏創意性機構設計法 (Yan's Creative Mechanism Design
Methodology) 進行概念設計。然後，針對所產生之連桿機構作軌跡、速度與
加速度分析。因其軌跡為 8 字形軌跡，因此在進一步做研磨軌跡的曲率分
析和速度偏差百分比分析，並以此為設計參數。最後，使用最佳化方法，
設計出軌跡接近正 8 字形的光纖頭套端面研磨機。

並列摘要

Recently, for the transfer of large data information, tranditional copper core
can't afford this requirement. Hence, copper cores are replaced by optical
fibers. The connectors are the main components of optical fiber transfers.
And, optical fiber ferrules are the key parts. The optical fiber ferrules have the
characteristics of low insertion loss and hight return loss. For two optical
fibers connecting together, if the end-face geometric shapes do not match, it will
make harmfull for information tramsfer. Hence, the polishing of optical fiber
ferrule end-face is very importion for information transfer.
According to the polishing traces, the optical fiber end-face polishers can
classified into two kinds. First type polishers are the polishers with planetary
gear trains. This type polisher has the polishing trace of donut shape and less
used polishing area of polishing pad. Second type polishers are the polishers
with linkage mechanisms. This type polisher has the polishing trace of figure 8.
And this type polisher has feed devices that increase the used polishing area.
The purpose of this research is to analyze the polishing traces curvature, and
velocity deviation rate (VDR) of optical fiber polishers with planetary gear
trains and with linkage mechanisms. For polishers with planetary gear trains,
we analyze the polishing traces and derive their the velocity and acceleration
equations. Based on the above process. we can understand the characteristies
of the design parameters for optical fiber end-face polishers. Then. we used
more polishing areas and less VDR to design the optical fiber end-face polishers.
For polishers with linkage mechanisms, based on Yan's creative mechanism
design methodology, all design concepts with seven-bars and eight joints are
synthesized. Then, according to the kinematic analysis of linkage mechanism,
we analyze the curvature of polishing traces of figure 8. Finally, by using the
optimal method the optical fiber polisher with linkage mechanism are
synthesized.

參考文獻

4. Toshihiro Shintaku, and Etsuji Sugita, HighlyStable Physical-Contact

Optical Fiber Connerctors with Spherical Convex ends, J.Lightwave

5. Mitsuo Takhashi, Polishing Apparatus for End Faces of Optical Fibers,

7. Mitsuo Takahashi, Optical Fiber End-Surface Polishing Device, U.S.

Patent 4979334, 1990.