該文檔描述如何用FRED仿真使用球形透鏡的光纖耦合，另外，使耦合光纖在縱軸和橫軸上擾動，利用FRED腳本語言進(jìn)行相應(yīng)的容差分析，仿真結(jié)果直接通過COM在Excel 里記錄和繪圖。要介紹的這個仿真程序源于Cheung和Yiu的論文：Cheung, Y.M. and Yiu, C.H. “Simulation of the Alignment Sensitivity on the Coupling Efficiency of a Ball-Lens Capped TO-Can Laser Diode Source into a Single Mode Fiber”. Int’l Symposium on Electronic Materials and Packaging. 2002; 197 – 203.
關(guān)于“光纖耦合效率分析”的說明文檔及FRED程序，可點(diǎn)擊如下鏈接下載：
Fiber Coupling Analysis
http://fred-kb.photonengr.com/files/2010/12/ballLensCoupler.frd
