本論文是以雙向全光式訊號調變模式轉換為主軸，分別進行模擬與實驗的部分。以高非線性光纖(Highly nonlinear fiber；HNLF)為非線性介質，透過四波混頻(Four wave mixing；FWM)的機制分別將BPSK訊號與45°PSK訊號作用，轉成QPSK訊號；QPSK訊號與CW(Continuous wave)作用，轉成BPSK訊號。
在FWM的過程中，我們以10-Gb/s的45°PSK訊號作為pumping light而10-Gb/s BPSK訊號作為probe light，作用後轉出來的QPSK訊號為idler light，其光訊雜比(Optical signal to noise ratio；OSNR)約為30 dB且位元錯誤率(Bit error rate；BER)可達10-4；而另一個方向為20-Gb/s的QPSK訊號作為pumping light而CW為probe light經由非線性效應轉出來的BPSK訊號為idler light，其OSNR約為25 dB且BER也可以達到10-4。

In this thesis, we propose and experimentally demonstrate an all optical PSK format conversion in a bi-directional scheme using four-wave mixing (FWM) effect in highly nonlinear fiber (HNLF). In the FWM process, a 20-Gbits/s quadrature phase-shift keying (QPSK) signal and a continuous wave (CW) are utilized as pumping light and probe light, respectively. A 10-Gbits/s binary phase-shift keying (BPSK) signal, which is the idler light, is successfully obtained with optical signal-to-noise ratio (OSNR) about 25 dB and bit-error rate (BER) lower than 10-4 . Similarly, a 10-Gbits/s 45°PSK signal is used as pumping light and a 10-Gbits/s BPSK signal is used as probe light. After FWM process in a HNLF, a 20-Gbits/s QPSK signal, which is the idler light, can be obtained with OSNR about 30 dB and BER lower than 10-4 .

口試委員會審定書 #
誌謝 i
中文摘要 ii
ABSTRACT iii
目錄 iv
圖列表 vi
表列表 ix
第1章 緒論 1
1.1 前言 1
1.2 研究動機 3
1.3 論文編排 4
第2章 傳送端與接收端的介紹 5
2.1 光學調變器的原理與應用 5
2.1.1 相位調變器(Phase modulator) 5
2.1.2 馬赫詹德調變器(Mach-Zehnder modulator) 6
2.1.3 IQ調變器(IQ modulator) 10
2.2 同調檢測的原理與應用 11
2.2.1 使用單個PD的同調檢測架構 12
2.2.2 使用單個B-PD的同調檢測架構 13
2.2.3 使用90°-hybrid單偏振的正交同調檢測架構 14
2.2.4 使用90°-hybrid雙偏振的正交同調檢測架構 15
第3章 非線性效應與實驗原理介紹 17
3.1 非線性效應(Nonlinear effects) 17
3.1.1 非線性介質(Nonlinear optical media) 17
3.1.2 非線性波動方程式(The nonlinear wave equation) 18
3.2 三階非線性效應(Third-order nonlinear optics) 19
3.2.1 光學克爾效應(Optical Kerr effect) 20
3.2.2 自相位調變(Self-phase modulation) 22
3.2.3 交互相位調變(Cross-phase modulation) 23
3.2.4 四波混頻(Four-wave mixing) 24
3.3 實驗原理介紹 27
3.3.1 QPSK轉BPSK的原理介紹 27
3.3.2 BPSK轉QPSK的原理介紹 28
第4章 模擬與模擬結果 30
4.1 QPSK轉BPSK 30
4.1.1 模擬架構 30
4.1.2 模擬結果 32
4.2 BPSK轉QPSK 40
4.2.1 模擬架構 40
4.2.2 模擬結果 41
第5章 實驗與實驗結果 52
5.1 QPSK轉BPSK 52
5.1.1 實驗架構 52
5.1.2 實驗結果 54
5.2 BPSK轉QPSK 59
5.2.1 實驗架構 59
5.2.2 實驗結果 60
第6章 結論 65
參考文獻 66

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