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研究生:羅詠翔
研究生(外文):Yung-Hsiang Lo
論文名稱:不同架構的高增益L-band摻鉺光纖放大器之探討
論文名稱(外文):Investigation of High Gain L-band Erbium Doped Fiber Amplifier with Different Structure
指導教授:董正成
指導教授(外文):Jeng-Cherng Dung
學位類別:碩士
校院名稱:國立東華大學
系所名稱:電機工程學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2014
畢業學年度:102
論文頁數:94
中文關鍵詞:摻鉺光纖放大器雙級L-band
外文關鍵詞:Erbium doped fiber amplifierTwo stageL-band
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本論文中,在固定總增益介質長度與總幫浦光源功率條件下,我們實驗了四種不同架構L-band摻鉺光纖放大器,目的是為了使摻鉺光纖放大器在L-band達到高增益與低雜訊之訴求。
首先我們架構一個單級L-band 15m摻鉺光纖放大器了解其增益特性。再利用EDF 5.5m與10m架構一個雙級L-band摻鉺光纖放大器。最後利用法拉第反射鏡(Faraday rotator mirror: FRM)與光循環器(circulator)架構出兩種不同類型的雙級L-band 反射型摻鉺光纖放大器,型一即為將第二級EDFA作double pass放大,型二即為將第一級EDFA作double pass放大。
我們經由實驗證明找出各個架構中之最佳化幫浦光源功率配置,並且發現雙級L-band摻鉺光纖放大器在L-band的增益效果比單級L-band摻鉺光纖放大器來得好,在波長1572nm~1588nm增益上升4dB以上。又雙級L-band反射型摻鉺光纖放大器型一增益效果比雙級L-band摻鉺光纖放大器較佳,在波長1588nm~1608nm增益上升5dB以上。
在雙級L-band摻鉺光纖放大器架構中,將第一級與第二級EDFA之增益介質長度互相調換對增益來講並沒有很大的影響。雙級L-band摻鉺光纖放大器(5.5m+10m)的雜訊比雙級L-band摻鉺光纖放大器(10m+5.5m)的雜訊低0.6dB左右。在雙級L-band反射式摻鉺光纖放大器架構中,更換EDFA位置(型一與型二的比較)對增益效果來說並不會有很大的差異,但就雜訊方面而言的話,型一比型二平均改善了2dB。

In this paper, we experimented four different architectures to achieve a goal of high gain and low noise figure with L-band erbium doped fiber amplifier that were in the same medium length and total pump power.
First, we structured a single stage L-band erbium doped fiber amplifier (EDFA) to investigate the gain characteristic. Second, we structured a two-stage L-band EDFA to investigate the gain characteristic. Finally, we used a Faraday rotator mirror (FRM) and an optical circulator to structure two reflective type two-stage L-band EDFAs. The type 1 was that let the second stage of the EDFA double pass. The type 2 was that let the first stage of the EDFA double pass.
And we demonstrated each architecture optimized configuration of pump power. The two-stage L-band EDFA is better than the single-stage L-band EDFA on the aspect of gain, and the gain was improved by 4dB from 1572 nm to 1588 nm. The reflective type two-stage L-band EDFA is better than the two-stage L-band EDFA on the aspect of the gain, and the gain was improved by 5dB from 1588 nm to 1608 nm.
In the architecture of two-stage L-band erbium-doped fiber amplifier, we interchanged the gain medium length without a difference for gain, but the noise figure was improved approximately by 0.6dB. In the architecture of reflective type two-stage L-band EDFA, we interchanged the positions of EDFA without a difference for gain, but the noise figure was improved approximately by 2dB.

誌謝 I
摘要 II
Abstract III
目錄 IV
圖列表 VII
第一章、序論 1
1.1研究背景 1
1.2 研究動機 2
1.3論文結構 3
第二章、光纖、光纖基本特性、光纖原件之介紹 5
2.1 光纖的歷史與發展 5
2.2 光纖的特性 6
2.2.1光纖損耗 6
2.2.1-1材料吸收損耗(Material absorption loss) 7
2.2.1-2雷利散射(Rayleigth Scattering) 8
2.2.1-3幾何效應(Geometric Effect) 9
2.3光纖的色散 10
2.3.1 材料色散(Material dispersion) 11
2.3.2 極化模態色散(Polarization mode dispersion, PMD) 11
2.3.3 波導管色散(Waveguide dispersion) 12
2.4光纖的種類 13
2.4.1單模光纖(Single-Mode Fiber, SMF) 13
2.4.2 色散位移光纖(Dispersion Shift Fiber, DSF) 13
2.4.3 非零色散位移光纖(Non-Zero Dispersion Fiber, NZDF) 14
2.4.4 色散補償光纖(Dispersion Compensation Fiber, DCF) 15
2.4.5 摻鉺光纖(Erbium Doped Fiber) 15
2.5光纖的非線性效應(Fiber nonlinearities) 16
2.5.1 受激布里淵散射(Stimulated Brillouin Scattering, SBS) 17
2.5.2 受激拉曼散射(Stimulated Raman Scattering, SRS) 17
2.5.3 四波混合(Four wave mixing, FWM) 17
2.5.4 自我相位調變(Self-phase Modulation, SPM) 18
2.5.5 交互相位調變(Cross-phase Modulation, XPM) 19
第三章、摻鉺光纖放大器增益機制原理介紹 21
3.1 摻鉺光纖放大器 21
3.2 摻鉺光纖放大器之放大機制 21
3.3放大自發輻射(Amplified Spontaneous Emission ,ASE) 27
3.4雜訊指數(Noise Figure: NF) 29
3.5增益飽和(Gain saturation) 34
3.6 L-band 摻鉺光纖放大器之原理 36
3.7幫浦光源特性(Pump characteristic) 37
第四章、單級L-band摻鉺光纖放大器之實驗 39
4.1 單級L-band摻鉺光纖放大器之實驗與分析 39
4.2 L-band摻鉺光纖放大器之Pump power選用 40
4.3 不同長度增益介質比較 42
4.4 反射式L-band 摻鉺光纖放大器 43
4.5 結論 45
第五章、雙級L-band 摻鉺光纖放大器之實驗 47
5.1 雙級L-band 摻鉺光纖放大器之實驗與分析 47
5.2 雙級L-band摻鉺光纖放大器(5.5m+10m)實驗結果 48
5.3 雙級L-band摻鉺光纖放大器(10m+5.5m)實驗結果 51
5.4 雙級L-band摻鉺光纖放大器增益與雜訊之比較 54
5.5 結論 56
第六章、雙級L-band反射型摻鉺光纖放大器之實驗 57
6.1 雙級L-band反射型摻鉺光纖放大器之實驗與分析(型一) 57
6.1.1 雙級L-band反射型摻鉺光纖放大器(5.5m+DP10m)實驗結果 58
6.1.2雙級L-band反射型摻鉺光纖放大器(10m+DP5.5m)實驗結果 61
6.1.3 雙級L-band反射型摻鉺光纖放大器之比較(型一) 64
6.2雙級L-band反射型摻鉺光纖放大器之實驗與分析(型二) 66
6.2.1雙級L-band反射型摻鉺光纖放大器(DP5.5m+10m)實驗結果 67
6.2.2雙級L-band反射型摻鉺光纖放大器(DP10m+5.5m)實驗結果 70
6.2.3雙級L-band反射型摻鉺光纖放大器之比較(型二) 73
6.3雙級L-band反射型摻鉺光纖放大器型一與型二比較之結果 75
6.4不同類型L-band摻鉺光纖放大器之比較 77
6.5 結論 79
第七章、多通道L-band摻鉺光纖放大器之實驗 81
7.1 多通道單級L-band摻鉺光纖放大器之實驗與分析 81
7.2 多通道雙級L-band摻鉺光纖放大器之實驗與分析 82
7.3 多通道雙級L-band反射型摻鉺光纖放大器之實驗與分析 83
7.3.1多通道雙級L-band反射型摻鉺光纖放大器(型一) 84
7.3.2多通道雙級L-band反射型摻鉺光纖放大器(型二) 85
7.4 多通道不同架構L-band摻鉺光纖放大器比較 87
7.5 結論 88
第八章、結果與討論 89
參考文獻 91

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