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論文名稱 Title |
RZ-DPSK 和RZ-DQPSK 系統在長距離光纖通訊系統下
Dispersion Map 設計的影響之理論模擬探討與研究 A Theoretical Study of the Dispersion Map upon Long-Haul RZ-DPSK and RZ-DQPSK Transmission System |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
48 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2012-06-27 |
繳交日期 Date of Submission |
2012-07-16 |
關鍵字 Keywords |
有效面積、色散圖、長距離傳輸、歸零碼差分向二鍵調變、歸零碼差分向一鍵調變 RZ-DPSK, RZ-DQPSK, Long-haul transmission, Dispersion map, effective area |
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統計 Statistics |
本論文已被瀏覽 5656 次,被下載 839 次 The thesis/dissertation has been browsed 5656 times, has been downloaded 839 times. |
中文摘要 |
現今長距離光纖傳輸系統是一非常重要傳輸訊息的方式,為了更好的傳輸 效率以及傳輸容量長距離光纖傳輸變得非常熱門,因此藉由科技去改善此系統的 表現變得非常重要,如同我們所知歸零碼差分向一鍵調變(RZ-DPSK)和歸零碼差 分向二鍵調變(RZ-DQPSK)已經在長距離傳輸系統有很高的知名度,因為這兩個條 變技術可以大大提升長距離傳輸系統的表現。 此外,色散圖的設計變得非常重要,它與以往的傳統系統使用振幅直接 偵測(IM-DD)技術大大的不同。另外,歸零碼差分向二鍵調變一個信息可以夾帶 兩個位元的資料傳送,所以歸零碼差分向二鍵調變是歸零碼差分向一鍵調變的兩 倍光譜效益,此研究著重色散圖的數據模擬在長距離歸零碼差分向二鍵調變系統 下的各種表現結果分析與研究。 |
Abstract |
Nowadays, the long-haul optical fiber communication system is one of the important way to convey the information, and there is strong competition of research in the optical long-haul transmission to achieve high channel bit rates and large transmission capacity. Therefore, it is important to study a technology to improve the performance of such system. The return-to-zero differential phase-shift keying (RZ-DPSK) and the return-to-zero differential quadrature phase-shift keying (RZ-DQPSK) have received renewed attention recently for the long-haul transmission systems, because they can improve the transmission performance of the long-haul system. Furthermore, the design of the dispersion map becomes significantly different from that of the conventional system using the intensity modulation direct detection (IM-DD) scheme. Besides, the RZ-DQPSK can transmit two bits per symbol, so it has twice the spectral efficiency of the RZ-DPSK. This study is focusing on the difference of the transmission performance of the long-haul RZ-DQPSK system due to the dispersion map using the numerical simulation. |
目次 Table of Contents |
◎ 致謝…………………………………………………………………………... V ◎ Abstract…………………………………………………………………..…VI ◎ 中文摘要………………………………………………………….…….... VII Chapter1 Introduction 1.1 Background of long-haul optical fiber communication system…………………...1 1.2 Motivation of this study………………...................................................................3 1.3 Structure of this thesis…………………………………………………………......5 References in this chapter………………………………………………………….…..6 Chapter2 Theoretical and technical background of this study 2.1 Theoretical background……………………………………………………………7 2.1.1 Nonlinear Schrodinger equation…………………………………………….7 2.1.2 Split-step Fourier method…………………………………………………..13 2.2 Technical background……………………………………………………………17 2.2.1 Dispersion map…………….…………………………………………17 2.2.2 DQPSK Modulation Format……… ……………………………………….19 Chapter3Transmission performance of long-haul RZ-DQPSK system 3.1 Explanation of the simulation model………….....................................................22 3.2 The performance degradation on long-haul RZ-DQPSK system………………..25 3.3 The effect of zero-crossing points upon RZ-DQPSK system……………………35 Chapter4 Conclusion…………………………………………………………..40 List of Abbreviation…………………………………………………………….41 |
參考文獻 References |
[1] H. Taga, S. -S. Shu, J. -Y. Wu, and W. -T. Shih, “A Theoretical Study of the Effect of the Dispersion Map Upon a Long-Haul RZ-DPSK Transmission System”, IEEE Photon. Technology Letter, vol. 19, no. 24, pp. 2060–2062, December 2007. 21 [2] G. Mohs, W. T. Anderson, and E. A. Golovchenko, “A new dispersion map for undersea optical communication systems,” in Proc. Optical Fiber Communication Conf. (OFC 2007), Anaheim, CA, March. 2007, Paper JThA41 [3] “A Study of RZ-DPSK Modulation Scheme upon Long-haul Optical Fiber Transmission”國立中山大學/光電工程研究所/96/碩士/096NSYS5124049 [4] H. Taga, S. -S. Shu, J. -Y. Wu, and W. -T. Shih, “A theoretical study of the effect of zero-crossing points within the dispersion map upon a long-haul RZ-DPSK system,” Optics Express, vol.16, no. 9, pp.6163–6169, April 2008 [5] H. Taga and W. -H. Chung “Impact of dispersion map design upon transmission performance of long-haul RZDPSK system using dispersion flattened fiber” Optics Express, vol. 18, no 8, pp. 8332-8337, April 2010 [6] “Theoretical Study to Investigate the Optimum Dispersion Map Design for Long-haul RZ-DPSK System Using DFF,”國立中山大學/光電工程研究所/97/碩 士/鍾偉宏 |
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