因應10Gbps 光纖網路的迅速發展，降低網路所需之主被動元件成本也成為相對趨勢。本論文提出運用氧化鋁陶瓷做為基板，構裝出低成本之新穎 10Gbps光接收次模組。

在結構方面，所設計之LC插座型元件符合“光學元件多源協議 (XMD-MSA)”之統一規格。此外，此設計採用平窗型封蓋和BK52的球透鏡替代傳統的透鏡型封蓋，除了成本較低外，也省略了透鏡對光檢測器的對耦步驟。

在光學特性方面，由於陶瓷基板型光接收次模組在設計方面物距相較比像距短，因此在光學上為放大系統。這造成耦光效率降低及橫向位移的容許度變窄。本論文提出採用以矽材質製成的微透鏡放置在光檢測器的上方將已放大的光班再度聚合以提高光學特性。量測報告顯示，使用微透鏡後在1310nm波長的光響應度為0.81A/W而在80%的橫向位移容許範圍可達到35um，符合與Zemax光學模擬後的結果。

本論文利用模擬軟體提出10Gbps PIN-TIA 光接收次模組的高頻設計方向，分別探討光檢測器和連結金線的尺寸和規格對於高頻模組的影響。模擬結果顯示光檢測器的接收面積在直徑36um時-3dB頻寬可達到~14GHz同時達到90% 的圓內能量。連結金線，尤其是訊號傳輸線，需要限制在1mm以下以維持10Gbps的高頻特性。

整體陶瓷基板型光接收次模組的高頻特性則是依輸出端的型態做模擬。模擬結果顯示模組頻寬和反射損失分別為9.6GHz和-9.5dB。在靈敏度和飽和度方面量測結果分別為-11dBm和2.9dBm。經由實驗後可證明使用低損失且阻抗匹配之FPC板，靈敏度可期望提升6dB。模組在-5℃、25℃和85℃的靈敏度差異為 1.12dB。模組在時域的特性方面可由眼圖來觀察，模組的交叉比率、時基誤差和上升時間分別量測為 51%，2.9 psec和53.39 psec。

陶瓷基板型光接收次模組在材料成本和製造成本分別為習用光接收次模組的76% 和85%，量率初估與習用光接收次模組相同為95%。因此，總成本為習用光接收次模組的80%。

In this dissertation, a cost competitive 10Gbps PIN-TIA optical sub-assembly receiver based on Alumina ceramic substrate is proposed. The innovated ceramic based ROSA packaging is in the form of LC receptacle type and is fully compatible to XMD MSA requirements. By taking BOM cost, production cost and yield rate into considerations, the overall cost of ceramic base ROSA is 80% to the conventional ROSA.

As for the optical properties of ceramic based ROSA, since the object distance of ceramic based ROSA is shorter than its image distance, thus the ceramic ROSA is considered as magnification system. The optical system of ceramic based ROSA can be optimized by placing a micro-lens above the detector to converge the beam spot. The responsivity of micro-lensed ceramic based ROSA at 1310nm of wavelength and the lateral shifts tolerance are 0.81 A/W and 35um, respectively.

The electrical performances of micro-lensed ceramic based ROSA are verified through the simulation and measurement. The simulated -3dB cutoff frequency and electrical return loss are 9.6GHz and -9.5dB at 7.5GHz, respectively. A pair of coaxial cables with 10dB loss at 10GHz is in place to measure the sensitivity and the saturation power. The sensitivity and the saturation power measured at 10Gbps are -11 dBm and 2.9dBm, respectively. In comparison to the ROSA with sensitivity of -19dBm at 10Gbps that is also measured by the coaxial cables, the result is -13 dBm. Thus, the hypothesis is made that the sensitivity of micro-lensed ceramic based ROSA might improve at least 6 dB if the appropriated FPC is utilized.

The sensitivity variation of ceramic ROSA measured at -5℃, 25℃, and 85℃ is 1.12 dB. The electric eye pattern of the ceramic based ROSA shows that the eye crossing percentage of ceramic ROSA is 51.3%, and the Jitter RMS and rise time are measured as 2.9 psec and 53.39 psec in average, respectively.

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