隨著網路科技的革新，人們開始追尋更快速、更高品質的傳輸方法，本篇論文根據多年來實驗室學長姐們所建立的EML等效小訊號模型進行模擬與優化，並利用曲線擬和的方法，在電路模擬上實現外調雷射電光轉換的非線性特性，設計出大訊號電路模型，接著使用軟體模擬傳輸線基板的頻率響應狀況，將傳輸線基板模型、打線模型以及前述設計的EML 小訊號與大訊號電路模型，進行模擬整合，得到完整的EML模組架構。
本篇論文透過半導體雷射等效電路的推導，設計出RIN相對雜訊的等效小訊號模型，並將其與實驗室量測到之RIN雜訊進行比對擬和，得到雜訊對應的眼圖變化。
最後將整合完成的EML模組進行各項匹配元件的優化，使實際量測的結果與模擬結果相吻合，實現 EML傳輸模組良好的效能表現，未來在面對更高的頻寬需求時，能修改EML電路模型與訊號走線的型式，藉此最佳化光傳輸模組的效能。

Along with the innovation of network technology, people is looking forward to pursue faster and higher-quality transmission methods. This thesis simulates and optimizes the equivalent circuit model of Electro-absorption modulated laser (EML) that established by the prior researchers of our lab. The polynomial equation is developed to model the measured P-V curve of the EML to account for its large-signal responses.
The submount of EML was simulated by using the 3-D electrosimul-ation software. Then, the submount model, bonding wire model, EML equivalent circuit model, and large-signal model, were combined to obtain performance of the EML module.
This thesis derived the noise equivalent circuit for the semiconductor laser diode of the EML and developed, the equivalent circuit of the relative intensity noise (RIN) in the laser. Then, simulated RIN spectrum was compared of relative with the measured RIN for the EML used in the experiment. Further, optimization on the impedance matching for the EML module was conducted to achive satisfactory bandwidth for the EML module. The approach can be applied to optimize the EML devices with higher data rates.

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