隨著近年來數據傳輸需求大幅增加，導致大量數據傳輸的速度達到前所未有的需求，而光通訊傳輸系統相較於電通訊傳輸系統具有更低的能量損耗，並且有更快的傳輸速率，而本篇所注重的主要元件為高速矽光調變器以及高速鍺光偵測器，我們將設計並整合以上兩種元件，建構具上傳及下載的矽光子光載射頻轉換光電晶片模組。
本篇利用矽光調變器及鍺光偵測器之等效電路模型來進行元件設計，首先針對矽光子光載射頻轉換光電晶片所運用的被動元件(光波導、光柵耦合器、多模干涉耦合器以及波長解多工器)進行設計，接著根據本篇所整理的元件設計參數與元件特性關係，建立其設計流程。
接著根據設計流程進行矽波導(鍺波導)尺寸、調變區域(收光區域)、傳輸電極尺寸及長度等最佳化設計，而根據矽光調變器的模擬(量測)結果顯示，當電極長度為1mm時，其電光操作頻寬約為37(21)GHz，長度為2mm時，則約為23(10)GHz；而根據鍺光偵測器的模擬結果顯示，當鍺波導寬度為0.5μm時，其操作頻寬約為20GHz，而當鍺波導寬度為0.4μm時，其操作頻寬約為25GHz。
而在矽光調變器的量測上，當電極長度為1mm時，我們成功觀測到32Gb/s調變之眼圖；而當電極長度為2mm時，我們成功觀測到28Gb/s調變之眼圖。

With continuous demand for data transmission during the past few years. This has resulted in an unprecedented demand in the speed and volume of data transmission. Compared with the electric transmission system, the optical transmission system has lower energy loss and has higher transmission speed. The main devices of this thesis are high-speed silicon electro-optical modulators and high-speed germanium photodetectors. We design and integrate the above two devices to construct silicon photonic integrated circuits for radio-over-fiber system with upload and download functions.
In this thesis, we design the silicon optical modulators and germanium photodetectors based on their equivalent circuit model. At first, we design the passive devices (optical waveguide, grating coupler, multimode interference coupler and wavelength demultiplexer) in silicon photonic integrated circuits for radio-over-fiber system. Then, we establish the design flow according to the relationship between the characteristics and parameters of the devices.
Next, we optimize the dimension of silicon(germanium) waveguide, modulation (photodetection) region, size and length of traveling-wave electrode based on the design flow. According to the simulation(measurement) results of optical modulators, the operation bandwidth is about 37(21)GHz / 23(10)GHz when the length of the electrode is 1mm / 2mm. According to the simulation result of germanium photodetectors, the operation bandwidth is about 20GHz(25GHz) when the width of the germanium waveguide is 0.5μm(0.4μm).
In the measurement of silicon optical modulators, we successfully observe the eye diagram under 32Gb/s(28Gb/s) modulation when the length of the electrode is 1mm(2mm).

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