臺灣博碩士論文加值系統

WDM-PON的高網路安全性以及可提供大量用戶的優點使其在次世代的被動光網路系統備受矚目，如何降低系統成本和提高傳輸效率已成為重要課題。在本論文中，我們利用注入鎖定技術注入弱共振腔法布立-培若雷射二極體，使其可作WDM-PON中的無色ONU光源。我們將展示利用可調式雷射注入鎖定端面反射率為1%的弱共振腔法布立－培若雷射二極體，並在弱共振腔法布立-培若雷射二極體直接調變OFDM和SC-FDE訊號。在鎖定範圍1545奈米到1575奈米的區間內，我們成功地傳輸了20Gbit/s的OFDM以及SC-FDE訊號，並且在傳輸25公里後依然可以得到優秀的誤碼率。利用注入鎖定弱共振腔法布立-培若雷射二極體相較於注入傳統的法布立-培若雷射二極體有較好的成果，因此此研究將大幅提升WDM-PON系統的發展。

Wavelength-division-multiplexing PONs (WDM-PONs) recently have been envisioned as prominent technology for next-generation PONs because of its high network security and it can provide great amount of users. How to keep the cost down and increase data transmission is the most important issue.
In this thesis, we use the injection-locked weak-resonant-cavity Fabry-Perot laser diode (WRC-FPLD) at WDM-PON so that it can be used for colorless ONUs light source. We will show the WRC-FPLD with 1% front-facet reflectivity injected by a tunable laser and directly modulated for optical OFDM and SC-FDE transmission. In the locking range of 1545nm~1575nm, We can successfully transmit 20Gbit/s OFDM and SC-FDMA signal after 25km with good BER performance.
The performance of injection-locked WRC-FPLD is better than conventional FPLD. This technology could promote the development of WDM-PON system.

Chapter1 Introduction 1
1.1 Background 1
1.2 Basic Concept of TDM-PONs and WDM-PONs 2
1.2.1 Time-Division-Multiplexing PONs 2
1.2.2 Wavelength-Division-Multiplexing PONs 3
1.3 Motivation 4
Chapter2 OFDM & SC-FDE 7
2.1 Orthogonal Frequency Division Multiplexing 7
2.1.1 The Basic Concept of OFDM 7
2.1.2 The Advantages of OFDM 8
2.1.3 The Disadvantages of OFDM 9
2.2 Single Carrier Modulation with Frequency Domain Equalization 10
2.2.1 Single Carrier Modulation 10
2.2.2 Frequency Domain Equalization 11
2.3 Comparison between OFDM and SC-FDE 11
Chapter3 Injection Locking 14
3.1 Fabry-Perot Laser Diode 14
3.1.1 Introduction of FP-LD 14
3.1.2 The Laser Rate Equation 14
3.2 Injection Locking 15
3.2.1 Introduction of Injection Locking 15
3.2.2 Basic Concept of Injection Locking of Semiconductor Laser
Diode 16
Chapter4 Experimental Results 18
4.1 Injection-Locked WRC-FPLD 18
4.1.1 L-I Curve 18
4.1.2 Optical Spectrum of Injection-Locked WRC-FPLD 19
4.2 OFDM Transmission 22
4.2.1 OFDM Transmission Experimental Setup 22
4.2.2 Master-Mode Injection Locking 23
4.2.3 Side-Mode Injection Locking 26
4.2.4 Receive Sensitivity 28
4.3 SC-FDE Transmission 31
4.3.1 SC-FDE Transmission Experimental Setup 31
4.3.2 Master-Mode Injection Locking 32
4.3.3 Side-Mode Injection Locking 33
4.3.4 Performance Compared to OFDM 35
Chapter5 Conclusion 37
Reference 41

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