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研究生:郭建弘
研究生(外文):Chien-Hung Kuo
論文名稱:同時傳輸光纖有線電視/QPSK正交分頻多工訊號的新世代光纖網絡傳輸系統
論文名稱(外文):Simultaneous Transmission CATV/QPSK OFDM Signals for Next-generation Optical Fiber Access Network
指導教授:呂海涵呂海涵引用關係
口試委員:陳南光黃振發吳孟奇
口試日期:2012-07-03
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:光電工程系研究所
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:2012
畢業學年度:100
語文別:英文
論文頁數:63
中文關鍵詞:光纖有線電視正交分頻多工長距離被動光纖網路塑膠光纖
外文關鍵詞:fiber optical cable televisionorthogonal frequency division multiplexinglong reach passive optical networkplastic optical fiber
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最近幾年,為了在有限的頻寬中提高整個頻寬的使用效率。數位調變的技術日漸被受到注視光通訊傳輸系統引進了原本被使用在電訊號傳輸系統的技術。特別是正交分頻多工這項技術, 此項技術能使的光通訊產業有著更大的一個突破。
本論文中,第一個架構我們利用光纖有線電視發射機同時傳輸光纖有線電視及正交分頻多工訊號經20公里單模光纖和25公尺的塑膠光纖,並且沒有在單模光纖和塑膠光纖的連接之間額外使用任何的波長轉換技術和電路板的控制。在實驗中,不僅僅在正交分頻多工的訊號上能的到一個符合標準的數值,在有線電視訊號數值的量測也皆能符合光纖為波傳輸系統的性能要求。
本論文中的第二個架構,我們提出一個能夠同時傳輸光纖有線電視/QPSK正交分頻多工訊號的長距離被動光纖網絡傳輸系統。此系統在電域結合有線電視與正交分頻多工訊號,並載入光纖有線電視發射機做外部調變,接著使用光放大器來傳輸經由60公里單模光纖後,在本地交換節點,可達到8個用戶端之分光比,然後透過25公尺塑膠光纖來傳輸給各個用戶端,最後在用戶端分別分析有線電視與正交分頻多工訊號品質,均達到有線電視的性能要求。


Recent year, in order to achieve increase utilized bandwidth efficiently at limited bandwidth. So, technique of digital modulation is very important gradually, optical fiber transmission imported technique from electrical communication system. Especially, it imported technique of orthogonal frequency division multiplexing (OFDM), which lead to optical communication has better developmental than conventional.
In this thesis, first architectures we use cable television (CATV) transmitter to simultaneous modulate and transmit both CATV and OFDM signals through optical fiber. Without using any wavelength conversion or bridge circuit between 20 km single mode fiber (SMF) and 25 m graded-index plastic optical fiber (GI-POF) connection, error free transmissions with sufficient low bit error rate (BER) values as well as good performances of carrier-to-noise ratio (CNR), composite second-order (CSO), and
composite triple beat (CTB) are obtained for CATV one.

In this thesis, second architectures we propose a simultaneous transmission of CATV and OFDM signals for long leach passive optical network (LR-PON). Both signals are combined in the electric domain, and external modulated with the CATV transmitter. Then use the two-stage optical amplifier to compensate 60 km SMF transmission. In the local exchanging, up to 8 clients of the splitting ratio is achieved, and transmit to each client through 25 m POF. Moreover, both CATV and OFDM
signals are all satisfy the requirement of CATV systems.


Content

摘 要……………………………………………………………………………………..i
ABSTRACT……………………………………………………………………………..ii
致 謝………………………………………………………………………………..…..iv
Content…………………………………………………………………………………...v
Figure…………………………………………………………………………………...vii
Table……………………………………………………………………………………..x
Chapter1 Introduction……………………………………………………………………1
1.1 History of Optical Fiber Communication ……………………………………...1
1.1.1 Passive Optical Networks (PON)……………………………………….4
1.1.2 Fiber To The X (FTTx)………………………………………………….6
1.2 Motivation ……………………………………………………………………...9
Chapter 2 Cable Television (CATV) Transport System and Orthogonal Frequency Division Multiplexing (OFDM) signal…………………………………………………10
2.1 Optical Fiber CATV Transport System……………………………………..…10
2.1.1 Carrier to Noise Ratio (CNR)………………………………………….11
2.1.2 Composite Second Order (CSO)………………………………………13
2.1.3 Composite Triple Beat (CTB)………………………………………….14
2.1.4 Nonlinear Distortion…………………………………………………...15
2.2 Orthogonal Frequency Division Multiplexing (OFDM)……………………...18
2.2.1 Quadrature phase-shift keying (QPSK) ……………………………….22


Chapter 3 A Hybrid CATV/QPSK OFDM Fiber to the Home-Devices Network……...23
3.1 Introduction…………………..……………………………………………….23
3.2 Experiment Setup……………………………………………………………..26
3.3 Experimental Results and Discussion…………………………………………30
3.4 Summary...…………………………………………………………………….37
Chapter 4 An Integrated Long-reach PON and In-door Network Architecture for Hybrid CATV/OFDM Transmissions ………………………………………………………….38
4.1 Introduction…………………………………………………………………...38
4.2 Experimental Setup…………………………………...……………………….41
4.3 Experimental Results and Discussion…………………………………………49
4.4 Summary…………...………………………………………………………….53
Chapter 5 Conclusion…….…………………………………………………………….54
Reference……………………………………………………………………………….56
Publication List…………………………………………………………………………63


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