摻鉺光纖雷射脈衝形變技術及自適應控制與其應用

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研究生：	鄭開騰 Cheng, Kai-Teng
論文名稱：	摻鉺光纖雷射脈衝形變技術及自適應控制與其應用 Spectral Shaping and Adaptive Control of Er:fiber Lasers and Applications
指導教授：	潘犀靈
口試委員:	張存續趙如蘋
學位類別：	碩士 Master
系所名稱：	電機資訊學院 - 光電工程研究所 Institute of Photonics Technologies
論文出版年：	2014
畢業學年度：	102
語文別：	英文
論文頁數：	74
中文關鍵詞：	freezing phase algorithm 、radio over fiber 、adaptive control 、Gerchberg-Saxton algorithm
相關次數：	點閱：3 下載：0
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本論文中，我們的光源為1550nm摻鉺光纖脈衝雷射，藉於脈衝形變原理及自適應控制，我們利用凍結相位演算法產生一傅氏轉換極限脈衝。進一步我們也利用Gerchberg-Saxton演算法產生了設計的任意波型。
此外，我們亦將摻鉺光纖脈衝形變技術用於超高速光通訊傳輸系統，我們結合1550nm連續雷射相位調製光頻梳及可調式脈衝形變器，配合光電式W頻帶光纖-無線通訊系統，我們展示了一規模可調並可無縫升級的無線/光纖集成網路。用戶端只需替換一光帶通濾波器即可無縫升級。其有線資料傳輸率達到17.45Gb/s且光纖資料傳輸率達3.36Gb/s。我們亦觀察了在光纖中射頻強度衰減效應。

In this thesis, we first use adaptive freezing phase algorithm to produce a reference transform-limited pulse. The light source is 1550nm mode-locked Er:fiber laser. In addition, we also demonstrated an arbitrary waveform generation by adaptive Gerchberg-Saxton algorithm.
Besides, we also applied spectral shaping technique in high speed optical communication. By combining optical comb generated by phase modulation of continuous wave, programmable shaper and photonics W-band fiber-wireless system, we proposed an easily upgradable and service-integrated access network. The users can easily upgrade their system by changing optical band-pass filter. The wired data rate and wireless data rate can achieve 17.45 Gb/s and 3.36Gb/s respectively after 40 km of single-mode fiber. The radio frequency power fading effect in the fiber also investigated in this experiment.

摘要    i
Abstract    ii
致謝    iii
Table of Contents    iv
List of Figures    vi
List of Tables    ix
Chapter1 Introduction    1
1-1 Pulse Shaping Technique    1
1-2 Pulse Shaping by Adaptive Control    2
1-3 Pulse Shaping for Optical Communication Network    3
1-4 Motivation and Organization    4
Chapter2 Theory    6
2-1 Pulse Shaping Technique    6
2-1-1 Basic of Pulse Shaping Technique    6
2-1-2 Typical 4-f pulse-shaping system    8
2-1-3 Adaptive Feedback Algorithm of Pulse Shaping    9
2-2 Pulse Shaper (Finisar WaveShaper 4000S)    11
2-2-1 Optical Design of WS 4000S    12
2-2-2 Detail Parameters of WS 4000S    14
2-3 Er:doped Fiber and applications    15
2-3-1 Er:doped Fiber    15
2-3-2 Application of Er:doped fiber    16
2-4 Interferometric Type Autocorrelator    17
2-5 Photonics Transmitter    21
2-5-1 Photonics Generation of Millimeter Optical Source    21
2-5-2 Near-Ballistic Uni-Travelling Carrier Photodiode    24
2-5-3 Photonics Transmitter    27
2-6 Radio-over-fiber System    29
2-6-1 Radio-over-fiber system    29
2-6-2 Radio Frequency Power Fading Effect in Fiber    29
2-6-3 Bit-Loading Technique    31
2-7 Encoding method    31
2-7-1 Orthogonal Frequency Division Multiplexing    31
2-7-2 Guard Interval and Cyclic Prefix    34
Chapter3 A Scalable and Continuously Upgradable Service-integrated Access Network    36
3-1 Experiment Setup    36
3-2 Results and Discussion    39
3-2-1 Radio-Frequency Power Fading Effect    39
3-2-2 Bit-Error Rate and Signal-to-Noise Ratio    44
3-2-3 Discussion    45
3-3 Proposed Service-integrated Access Network    47
Chapter4 Adaptive Control of Er:fiber Lasers    51
4-1 Adaptive Algorithms    51
4-1-1 Freezing Phase Algorithm    51
4-1-2 Gerchberg-Saxton Algorithm    54
4-2 Experiment Setup    57
4-2-1 Laser System    57
4-2-2 Adaptive Control Feedback System    58
4-3 Results    59
4-3-1  Freezing Phase Algorithm Simulation Result    59
4-3-2 Freezing Phase Algorithm Experiment Result    60
4-3-3 Gerchberg-Saxton Algorithm Result    62
4-4 Discussion    67
Chapter5 Conclusions and Future Works    69
5-1 Conclusions    69
5-2 Future Works    69
Reference    71

                                

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