光開關自動對位與封裝測試之研究

Abstract

本文係研發自動動態切換尋光技術應用於創新型1×2機械式光開關，可快速對1x2光開關元件進行自動尋光對位與封裝。首先，以精密加工技術與微機電元件製造技術相結合，研製出小尺寸(20×16×7.5mm )、低成本(US$10)與高可靠度之1×2機械式光開關。機構部分先設計一組創新機構，採用了光纖直接對位(fiber-to-fiber)的光路傳輸設計方式，運用了幾何誤差縮小原理，將誤差縮小至0.1μm，因本光開關創新機構與光路切換設計上，可藉由影像處理來達到自動化對準的目的，所以以LABVIEW軟體來自行研發撰寫控制程式，整合CCD光學影像處理單元與PZT微動平台之位移補償控制系統，快速搜尋與平衡兩output channel之最低insertion loss，並使兩output channel最低insertion loss值差為0.1dB，作為進行最佳化的目的。實驗結果證明，雙邊channel可達到之最低insertion loss 為: Ch1=-0.51dB、Ch2=-0.47dB，最快兩channel的尋光時間為360秒。

This research develops a dynamic self-alignment technique for an innovated 1×2 mechanical optical switch, in which the input fiber can automatically reach to the optimum position and package immediately. First, we used precision manufacture technology and micro electromechanical systems (MEMS) to create the small size (20×16×7.5mm )、low cost (US$10) and high reliability 1×2 mechanical optical switch. By adopting fiber to fiber configuration and geometrical reduction tolerance principle, the designed alignment tolerance could reduce to 0.1μm. The new design of optical switch can achieve automatic alignment by using image process and the developed control program with the LABVIEW software. After utilizing the CCD image process and PZT self-alignment program to search the optimum balanced condition, under the constraint that the difference of both channels be under 0.1dB, we finally attain the best insertion loss of ch1= -0.51dB and Ch2= -0.47dB within 10 minutes of computation time.