臺灣博碩士論文加值系統

在此篇論文中，我們提出了具有單縱模 (Single-Longitudinal Model，SLM) 輸出波長可調諧且穩定的三環結構 L 波段摻鉺光纖(Erbium-Doped Fiber，EDF) 雷射系統，以及新穎的雙向傳輸分波多工被動光網路(Wavelength-Division-Multiplexing Passive Optical Network，WDM-PON) 系統。
在第一個研究中，我們設計了一個穩定單縱模輸出、窄線寬的光纖雷射系統，此系統包括了馬赫曾德爾干涉儀 (Mach-Zehnder Interferometer；MZI)、三環光纖、和基於未泵浦的摻鉺光纖的飽和吸收體 (Saturable Absorber，SA)用以抑制多縱模(Multi-Longitudinal mode，MLM)的產生並達到穩定的單縱模輸出；於此我們使用了 L 波段的摻鉺光纖放大器 (Erbium-Doped Fiber Amplifier，EDFA)，以其增益介質來擴展波長的操作範圍。
在第二個研究中，我們提出了一個雙向且可提升兩倍傳輸資料量的環形分波多工(Wavelength-Division-Multiplexing，WDM)接取網路系統。在此設計上，光信號可以同時在順時針以及逆時針的方向上進行訊號的傳輸，且光信號只使用單一光纖來同時進行下傳鏈路及上傳鏈路的訊號接取，同時可避免瑞利背向散射(Rayleigh backscattering，RB)產生，造成訊號干擾。於此我們使用對稱的10 Gbit/s 和28 Gbit/s 開關鍵控(On-Off Keying，OOK)的調變訊號，分別實現了50 km 和15 km 的長短距離傳輸。此外根據我們所得到的 WDM 訊號的功率預算與前向糾錯修正(Forward Error Correction，FEC)的限制下，此系統可以同時支援16 個光網路單元(Optical Network Unit，ONU)。
關鍵詞：單縱模、摻鉺光纖、分波多工、被動光網路、開關鍵控

In this thesis, we propose a three-ring structure L-band erbium-doped fiber (EDF) laser system with tunable and stable output wavelength for single-longitudinal-model (SLM) operation. Then, a novel bidirectional ring-type wavelength-division-multiplexing passive optical network (WDM-PON) architecture is also proposed here.
In the first study, we design an EDF laser system with stable SLM output and narrow linewidth by combining a Mach-Zehnder interferometer (MZI), a three-ring fiber scheme and an EDF based saturable absorber (SA) to suppress the generation of multiple longitudinal modes. In the experiment, we use an L-band erbium-doped fiber amplifier (EDFA) as the gain medium for wavelength-tuning in L-band range.
In the second study, we propose a bidirectional ring-shaped wavelength-division-multiplexing (WDM) access network to double the traffic rate. In the design, the transmitted wavelength can broadcast WDM signals in both clockwise and counterclockwise directions through single ring fiber path. The downlink and the uplink signals can be are received at the same time and Rayleigh backscattering (RB) beat effect also can be avoided. Here, we use symmetrical 10 Gbit/s and 28 Gbit/s on-off keying (OOK) modulation signals to achieve long and short distance transmission of 50 km and 15 km respectively for demonstration. In addition, according to the power budget and forward error correction (FEC) limit of the WDM signal we obtained, this presented access network can support 16 optical network units (ONUs) simultaneously.
Keywords: Wavelength-Division-Multiplexing (WDM); Passive Optical Network (PON); Single-Longitudinal-Model (SLM); Erbium-Doped Fiber (EDF); On-Off Keying (OOK)

第一章 緒論 ............................................................................................... 1
1-1 研究動機及背景 ........................................................................... 1
1-2 摻鉺光纖放大器 ........................................................................... 4
1-3 飽和吸收體濾波器 ....................................................................... 6
1-4 MACH-ZEHNDER 干涉儀 ........................................................ 8
1-5 分波多工與分時多工 ................................................................... 9
1-6 被動光網路 ................................................................................. 11
第二章 文獻回顧 ..................................................................................... 13
2-1 文獻回顧(一) .............................................................................. 13
2-2 文獻回顧(二) .............................................................................. 17
2-3 文獻回顧(三) .............................................................................. 20
第三章 在L波段可調頻寬的穩定波長掃頻單頻摻鉺光纖雷射 ........ 23
3-1 實驗介紹 ..................................................................................... 23
3-2 實驗架構 ..................................................................................... 24
3-3 實驗結果 ..................................................................................... 27
第四章 用於下傳和上傳訊號接取的雙向環形WDM光纖網路 ........ 34
4-1 實驗介紹 ..................................................................................... 34
4-2 實驗架構 ..................................................................................... 36
4-3 實驗結果 ..................................................................................... 39
第五章 結論 .............................................................................................. 48
參考文獻 ................................................................................................... 50
個人著作列表........................................................................................... 54

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