波長多工光通訊系統發中，設備的要求需寬頻與低串擾的元件來處理所有的信號。在光方向耦合器當中有一種絕熱式光方向耦合器是一個適當的選擇，其元件具有對光極化，光波長及元件長度不敏感的特性，其功能是控制功率，類似傳統光學的元分光器，因此絕熱式光方向耦合器是使用相當廣泛的元件。本研究提出了一修正型函數，並定義數個變數，利用串擾以及頻寬的模擬與計算優化所設計的耦合器。最後得知耦合器的結構參數、耦合器長度與加工裕度是需要被考慮的在絕熱式光方向耦合器的設計上，在五個不同的函數中每個所獲得的效益都是不一樣的，必須有各自的優化條件與使用處不同的先決條件。 Under WDM system, we often need a broadband device addressing all the signals. One of the candidates is the adiabatic coupler which exhibits advantages of insensitive to polarizations, wavelengths and length of the device. The objective of the work includes two parts: the fist part defines theory ranges and processing tolerance of mismatched optical coupler (MOC). The second part is optimization waveguide structure of MOC for low the crosstalk, broadband (broad bandwidth and C+L-band) and short couplers, respectively. The results prove clearly of coupling structure that short coupler length with process tolerance is need considered in the MOC.
