隨著光纖通訊量的快速成長，不同光調制訊號技術上光纖色散造成之頻率擾動會影響訊號傳輸品質，所以未來頻擾之控制將越來越重要。電致吸收調變器(Electroabsorption modulator; EAM)與半導體光放大器(Semiconductor optical amplifier; SOA)利用其振幅調變與相位調變技術使用於光纖通訊系統中。在論文中利用整合電致吸收調變器與半導體光放大器其天生故有之反向相位調制與振幅調制去實現預先補償頻擾技術。
實驗中利用光濾波器和10Gb/s之傳輸訊號去分析時間上頻率之擾動，利用控制EAM偏壓與SOA電流使得相位改變而去控制頻擾，在3GHz到-9GHz之間。同時，觀察10Gb/s之編碼訊號，發現可利用EAM與SOA因其相反之載子變化控制編碼相依之問題。最後，成功利用頻擾補償技術，將10Gb/s之訊號於單模光纖中傳輸至距離43km，適合使用於短距離光纖通訊系統。

Due to dramatic growth of capacity in optical fiber communication, the fiber dispersion has become one of major factors affecting the quality of optical signal transmission with different modulation scheme, leading to the importance in controlling optical chirp. Among the elements used for optical fiber communications, electroabsorption modulator (EAM) and semiconductor optical amplifier (SOA) are served as optical amplitude and phase modulation. In this work, EAM-integrated SOA is used to realize the pre-chirp technique through their inherently reversed phase modulation as well as amplitude modulation.
In the experiment, tunable optical filter and a 10Gb/s data pattern are used for extracting the frequency chirp of the timely signal. With the positive chirp operation in EAM, it is found that the overall chirp of EAM-integrated SOA can be varied from 3GHz to -9GHz by adjusting current injection through SOA. Also, as inspecting the 10Gb/s pattern, the pattern effect can also be controlled by the reversed carrier dynamics between EAM and SOA. Finally, a 10Gb/s data transmission with 43km transmission is demonstrated by using such pre-chirp technique, showing that such technique can be applied to other type signal processing.

論文授權書………………………………………………………………. ..i
論文審定書……………………………………………………………...…ii
誌謝……………………………………………………………………......iv
中文摘要……………………………………………………………...….. .v
英文摘要………………………………………..………………………... vi
第 一 章 序論……...………………………………………………..…..1
1.1研究動機……...……………………………………………...........1
1.2 光纖色散與補償…………...…………………………………..…3
1.3 提出之方式……………………………………………………...10
第 二 章 原理與方法……………………………………………….…12
2.1群速度色散(Group Velocity Dispersion)對訊號之影響………...12
2.2頻擾與利用預先之相位變化補償色散(Pre-chirp)………...........13
2.3 電致吸收調變器(EAM之吸收與相位變化…………................15
2.4半導體光放大器………………………………………………....18
2.5利用整合EAM-SOA達成低編碼之頻擾補償………………....21
第 三 章 實驗與討論……………………………………………….…23
3.1 EAMSOA元件結構與非線性曲線量測…………………….…23
3.2 頻擾(Frequency chirp)量測方法……………………………….25
3.3 EAMSOA頻擾之量測與特性分析……………………………27
3.4 EAMSOA編碼相依(Pattern effect)……………………………32
3.5 色散補償分析…………………………………………………..37
3.6 10Gb/s訊號傳輸架設與結果討論……………………………..41
第 四 章 結論與未來工作……………………………………….........48
參考文獻………………………………………….………………………54
附錄……………………………………………………………………….56

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