認知高速長距離光波系統的極化關係是設計成功關鍵，工作動機是探討和研究兩訊號間交互作用所造成的極化變化。兩個左旋極化光波長範圍設定從 1530.16 nm 到 1534.04 nm，且傳輸在相同的光路徑後被多工混合，由實驗指出，從極化分析儀分析後結果主要為左旋極化，然而分析儀偵測出部分的輸出訊號卻為右旋極化；兩個右旋極化光波長範圍設定從 1535.06 nm 到 1536.09 nm，經相同方式處理，結果完全為右旋極化。實驗證明，兩個左旋極化光在某個波段範圍互相交互作用，能夠導致極化狀態改變，並且當輸出光功率下降則輸出訊號的極化度增加，極化度和光功率之間有相當密切的反比關係。

Awareness of the polarization relationships within high-speed, long-distance light-wave systems is the key to successful designs. The work is motivated by the desires to explore and study the changes of the polarization states caused by the mutual interaction of the two polarization light signals. The wavelengths of the two left-hand polarization light signals were set the ranges from 1530.16 nm to 1534.04 nm. The two polarization light signals propagated through the same optical path were then multiplexed together. We saw the detection of the output polarizations with a polarimeter was mainly the left-hand polarization states. However, the right-hand polarization states of the output signals can be still discovered in the polarimetric analyzer. Other experiments with the same procedures were performed as stated above except that the wavelengths of the two right-hand polarization light signals ranged between 1535.06 nm and 1536.09 nm. Experimental observations indicate the output polarization light signals were completely the right-hand polarization states. The work demonstrated as follows, 1. The mutual interaction between the two left-hand polarization light signals can cause the important changes of the polarization states within some wavelength ranges. 2. The degree of polarization of the output signals increased as the output optical power decreased. There is a quite close inverse relationship between the degree of polarization and optical power.