臺灣博碩士論文加值系統

可見光通訊是近年來新興的無線光通訊技術，讓可見光除了顯示與照明應用之外，兼具自由空間(Free-Space)光信號傳輸功能。可見光通訊是世界上目前許多光通訊研發團隊所努力研究突破的亮點主題，高而亮度白光LED則是各國光通訊研發團隊用來作為可見光通訊系統的光源。可見光通訊傳輸系統可以用來取代RF無線通訊傳輸系統，不但可以減少及防止電磁波的干擾，且在許多禁止使用電磁波的場所(諸如醫院、飛機機艙、煉油廠……)，可見光通訊可以彌補RF無線通訊的不便。｢高傳輸速率｣及｢長距離自由空間傳輸｣是可見光通訊系統所努力追求的目標，世界上每一個可見光通訊研發團隊都希望能在這兩個目標上有所革命性的突破。然而受限於白光LED光源頻寬及功率的限制，｢傳輸速率｣及｢自由空間傳輸距離｣在各個研發團隊的努力開發下都已達到極限值(~1Gbps/5m)。為了能夠突破｢傳輸速率｣及｢自由空間傳輸距離｣兩個極限瓶頸，本論文提出了使用紅光雷射光作為可見光通訊系統的光源，這是世界上第一個提出利用紅光雷射光來建構超高速率可見光通訊傳輸系統，不但傳輸速率可高達10Gbps、且自由空間傳輸距離亦可達6m之遠，突破可見光通訊系統 ｢傳輸速率｣及｢自由空間傳輸距離｣ 兩大極限瓶頸。

The visible light communication (VLC) is a novel wireless light communication technology developed over the last few years, which makes the visible light not only capable for display and illumination but also for light signal transmission within free space. VLC is now a hot topic targeted by worldwide light communication R&D teams for a breakthrough. The high illumination white light LED is now used by many light communication R&D teams in the world as the light source of VLC system. The VLC transmission system is capable of replacing RF wireless communication transmission system, which could not only reduce or prevent the interference of electromagnetic wave but is also allowed to be used in the area where a RF system is prohibited such as hospital, airplane, oil refinery etc. VLC could eliminate many inconveniences in using RF wireless communication. “High transmission rate” and “Long free-space transmission distance” are two objectives the VLC system seeks for achievement. Every VLC R&D team in the world is so urge to have any revolutionary breakthrough on these two objectives. However, limited by the bandwidth and power of white light LED light source, both of the above have reached their ultimate values (~1Gbps/5m) after being developed diligently by each R&D team. In order to break through the limitation of “transmission rate” and “free-space transmission distance”, here we propose using a red laser beam as the light source of VLC transmission system, which makes us the first team propose using the red laser beam to build an extra high speed VLC transmission system with the transmission rate as highest as 10Gbps and a free-space transmission distance of 6m. This breakthrough resolved the bottlenecks of VLC system regarding both “transmission rate” and “free-space transmission distance”.

摘　要 i
Abstract iii
誌謝 v
Contents vi
Table Captions viii
Figure Captions ix
Chapter 1 Introduction 1
1.1 Research Background 1
1.2 Research Objectives 4
1.3 Structure of the dissertation 6
Chapter 2 10m/500Mbps WDM visible light communication systems 10
2.1 Introduction 10
2.2 Experimental setup 12
2.3 Experimental results and discussions 12
Chapter 3 Bidirectional 16-QAM OFDM in-building network over SMF and free-space VLC transport 19
3.1 Introduction 19
3.2 Experimental setup 20
3.3 Experimental results and discussions 23
Chapter 4 Full-duplex lightwave transport systems based on long-haul SMF and optical free-space transmissions 25
4.1 Introduction 25
4.2 Experimental setup 27
4.3 Experimental results and discussions 29
Chapter 5 An optical free-space WDM transport system 35
5.1 Introduction 35
5.2 Experimental setup 36
5.3. Experimental results and discussions 38
Chapter 6 A 10-Gbps optical WiMAX transport system 45
6.1 Introduction 45
6.2 Experimental setup 47
6.3. Experimental results and discussions 49
Chapter 7 Conclusions 58
7.1 10m/500Mbps WDM visible light communication systems 59
7.2 Bidirectional 16-QAM OFDM in-building network over SMF and free-space VLC transport 59
7.3 Full-duplex lightwave transport systems based on long-haul SMF and optical free-space transmissions 60
7.4 An optical free-space WDM transport system 60
7.5 A 10-Gbps optical WiMAX transport system 61
Reference 62
Publication List 67
Journal Papers 67
Conference Papers 70

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