臺灣博碩士論文加值系統

本論文為研發單通道傳輸速度達50 Gb/s的高速光次傳輸模組，提出幾項模擬與設計的解決方案。首先根據本實驗室量測到的外調雷射頻率響應圖，利用電路模擬系統將外調雷射等效成小信號電路模型，進一步驗證量測到的結果。此外利用曲線擬合的方法，在電路模擬中實現外調雷射電光轉換的非線性特性，完成大信號電路模型。並針對已下線的雷射驅動電路晶片，設計高速測試電路板，為方便控制晶片及連接後端雷射架構，電路板上信號傳輸線的頻寬必須符合3 dB頻寬在25 GHz以上，以降低連接及量測時信號的輸入損耗。本論文利用電路模擬系統及三維電磁模擬軟體設計及模擬傳輸線的信號完整度，並附上傳輸線的信號完整度量測結果與模擬結果比較。
本論文的主要貢獻為，根據建立的外調雷射的小信號與大信號電路模型，利用電路模擬軟體將元件的量測結果匯入成模型，並結合驅動電路，得以模擬完整的光次傳輸模組的響應，有利於優化高速光收發模組的效能。

This thesis presents the design and simulation of 50-Gb/s transmitters based on electro-absorption modulated lasers (EMLs). A novel comprehensive circuit model is developed for EMLs to account for the carrier trapping and optical reflection effects. This equivalent circuit model can explain and match with the measured frequency responses of an EML. A polynomial equation is developed to model the measured P-V curve of the EML to account for its large-signal responses. A high-frequency PCB for testing the performance of PAM-4 driving circuit chips is designed and fabricated. Simulations with Advanced Design System and EMPro are performed to ensure the transmission lines with sufficient bandwidth for transmission the high-speed signals to EMLs. The measured transmission line performance matches well with the design.
The major contribution of this thesis is to develop the small- and large-signal device models for co-simulation of the EML devices and their driving circuits. This approach allows to optimizing the device and circuits performance to develop the transmitter optical sub-assemblies that meet the requirements of ultrahigh data rate optical transceivers.

摘要 I
Abstract II
致謝 III
目錄 IV
圖目錄 VI
表目錄 XI
1 第一章 導論 1
1. 1 前言 1
1. 2 研究動機 2
1. 3 文獻探討 5
1. 4 論文架構 10
2 第二章 光次傳輸模組介紹與EML模擬 11
2. 1 光次傳輸模組之元件 11
2. 2 電致吸收調變器的原理與簡介 11
2. 3 EML小信號電路模型設計 13
2. 3. 1 設計動機及目的 13
2. 3. 2 EML 小信號電路 14
2. 3. 3 EML內部光調變之眼圖影響 23
2. 3. 4 EML大信號電路 25
3 第三章 IC測試電路板設計 29
3. 1 設計用途及原理 29
3. 2 IC元件介紹及安裝 31
3. 3 測試電路板設計 34
3. 4 傳輸線模擬及比較 37
4 第四章 電路板量測 41
4. 1 單通道傳輸線量測 41
4. 1. 1 信號完整度量測 41
4. 1. 2 眼圖量測 44
4. 2 焊上同軸連接器之傳輸線量測與改善 47
4. 2. 1 信號完整度與眼圖量測 47
4. 2. 2 分析與改善 53
4. 3 完整測試電路板量測 54
5 第五章 光傳輸模組整合模擬 56
5. 1 PAM-4驅動電路操作 56
5. 2 光傳輸模組電路模擬 58
6 第六章 結論 63
6. 1 成果 63
6. 2 未來研究方向 64
參考文獻 65

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