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研究生:毛立銓
研究生(外文):Li-Chuan Mau
論文名稱:光纖通訊元組件及次系統之光傳輸極化特性研究
論文名稱(外文):Study on the optical polarization characteristics of optical components and subsystems
指導教授:廖顯奎
指導教授(外文):S.-K. Liaw
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:電子工程系
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:2002
畢業學年度:90
語文別:中文
論文頁數:73
中文關鍵詞:誤碼率、極化相關損失、極化相關增益、極化模態色散、雷利散射、頻帶內串音、雙向傳輸、三向傳輸
外文關鍵詞:BER、PDL、PDG、PMD、Rayleigh scattering、homodyne crosstalk、bi-directional transmission、tri-directional transmission
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近日光纖通訊日新月異而光偏極化效應所造成的影響也引起人們高度的重視。研究發現光偏極化效應主要會造成傳輸系統中能量以及時域方面的誤差。能量方面,有所謂的極化相關損失 ( PDL: Polarization Dependent Loss ),會造成傳輸系統中傳遞能量的不穩定與偏差;時域方面,則有一極化模態色散 ( PMD: Polarization Mode Dispersion ) 來限制住傳遞時間,降低傳輸的品質。
本論文的實驗分為三部份,第三章量測光纖被動元件中的濾波器之極化相關損失 ( PDL ) 與極化模態色散值 ( PMD ),第四章為光纖主動元件中的摻鉺光纖放大器 ( EDFA: Erbiumed doped fiber amplifier ) 與拉曼光纖放大器 ( RFA: Raman fiber amplifier ) 之極化相關增益值 ( PDG: Polarization Dependent Gain ),並研究比較它們的極化特性及頻帶間串擾;第五章中研究三個有關光纖次系統中的PMD實驗,並提出以極化控制器來控制傳輸中的正交極化模以減少雷利散射現象 ( Rayleigh scattering ) 所造成的頻帶內串音問題 ( homodyne crosstalk )。由量測到的誤碼率數據值 ( BER: Bit Error Rate ) 能發現相關的極化特性問題的的確存在,最後我們於第六章中作一簡單的結論並建議未來可行之努力目標。

Today’s optical fiber communication progresses rapidly. As higher bit rate and longer distance are implemented, the impact of polarization problems such as polarization dependent loss (PDL), polarization dependent gain (PDG) and polarization mode dispersion (PMD) become very crucial issues and should be addressed. According to the research, polarization causes distortion in both energy and time in the communication system. In energy view, PDL causes the uncertainties on energy. In the time domain, once PMD shows up, it will limit propagation time and degrade the performances of lightwave communication.
In this thesis, we address and discuss the issues of the “polarization family members”, both on theory and experiments. The experiments could be divided into three parts. We measure the PDL (or PDG), PMD for (1) wavelength division multiplexing (WDM) components such as tunable filter, arrayed waveguide grating and fiber Bragg grating in Chapter 3; (2) optical amplifiers such as erbium-doped fiber amplifier and Raman fiber amplifier in Chapter 4 and (3) lightwave subsystems such as bi-directional transmission and tri-directional transmission in Chapter 5. The experimental configurations and measured results are shown and discussed in each Chapter. Finally, we make a brief conclusion and suggested the goal for future research.

中文摘要………………………………………………………………….I
英文摘要………………………………………………………………...II
誌謝…………………………………………………………………….III
目次…………………………………………………………………….IV
圖表索引………………………………………………………………VII
第一章 緒論……………………………………………………………1
1-1 研究背景與實驗方向………………………………………….1
1-2 論文架構……………………………………………………….2
第二章 光的極化特性…………………………………………………..4
2-1 前言……………………………………………………………4
2-2 光的極化概念…………………………………………………4
2-3 偏極化狀態的簡介……………………………………………5
2-4 邦加球 ( Poincar’e Sphere ) 的極化狀態表示方式……….7
2-5 偏極化效應在光纖通訊中的影響……………………………8
2-6 偏極化效應的量測方式………………………………………9
2-6-1 極化掃描法……………………………………………..10
2-6-2 邁克森干涉儀法………………………………………..11
2-7 PDL的統計換算方式………………………………………..12
第三章 分波多工濾波器的極化量測………………………………..15
3-1 前言………………………………………………………….15
3-2 分波多工濾波器的簡介…………………………………….15
3-3 可調式帶通光濾波器的量測結果………………………….18
3-3-1 實驗及分析討論………………………………………...18
3-3-2 PDL方面………………………………………………...21
3-3-3 PMD方面………………………………………………..22
3-4 陣列式波導光柵的量測結果……………………………….24
3-4-1 實驗及分析討論………………………………………...24
3-4-2 PDL方面………………………………………………...26
3-4-3 PMD方面………………………………………………..27
3-5 光纖布拉格光柵的量測結果……………………………….29
3-5-1 實驗及分析討論………………………………………...29
3-5-2 PDL方面………………………………………………...34
3-5-3 PMD方面………………………………………………..36
3-6 實驗結果的比較與討論…………………………………….38
第四章 光纖放大器的極化量測……………………………………..41
4-1 前言………………………………………………………….41
4-2 掺鉺光纖放大器的量測結果……………………………….41
4-3 拉曼光纖放大器的量測結果……………………………….46
4-4 實驗結果的比較…………………………………………….50
第五章 光纖次系統傳輸中的PMD實驗…………………………...53
5-1 前言………………………………………………………….53
5-2 極化模態對波長可再用的雙向傳輸系統之研究………….54
5-3 波長可再用的雙向傳輸系統實驗………………………….55
5-4 三向傳輸系統的實驗……………………………………….59
5-5 色散補償光纖的相關實驗………………………………….66
第六章 總結…………………………………………………………..71
6-1 結論………………………………………………………….71
6-2 未來展望…………………………………………………….72
參考資料………………………………………………………………..74

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