本實驗採用光纖的共振光束系統，可用於長距離及光學無線訊號傳輸(Resonant Beam Communication, RBC )系統。使用摻鉺光纖放大器作為增益介質，再透過光纖布拉格光柵、光循環器及耦合器形成共振光。電訊號則是利用5G基頻傳收機、訊號產生器及圖形產生器，分別發送正交分頻多工(OFDM)、類比及數位訊號，藉由電光相位調變器調變後，經由準直器在Free Space中進行傳送訊號來達成無線光通訊。而在接收端的部分是利用光檢測器，把光訊號轉換為電訊號，再過濾直流後剩下交流輸出用於訊號傳輸。
本實驗架構透過無線光通訊系統，在發送端傳輸不同訊號的情況下讓接收端去進行比較。實驗结果表明，所提出的正交分頻多工技術於無線光通訊傳輸系統可以成功的實現同步共振光。

In this experiment, one optical fiber based resonant beam system, which can be used for long-range and Resonant Beam Communication(RBC), is adopted.The erbium-doped fiber amplifier is used as the gain medium, and the resonant light is formed through Fiber Bragg Grating, Circulator and Coupler. The electrical signal uses the 5G baseband transceiver, signal generator and pattern generator to send Orthogonal Frequency Division Multiplexing(OFDM), analog and digital signals respectively. After modulation by Electro Optic Modulator, wireless optical communication is achieved by transmitting signals in Free Space through the collimator. The part at the receiving end uses a photodetector to convert the optical signal into an electrical signal, and then filters the DC and leaves the AC output for signal transmission.
The experimental architecture uses a wireless optical communication system to allow the receiver to compare when the transmitter transmits different signals. The experimental results show that the proposed orthogonal frequency division multiplexing technology can successfully realize the synchronous resonant light in the wireless optical communication transmission system.

摘要...i
Abstract...ii
誌謝...iii
目錄...iv
表目錄...vi
圖目錄...vii
第一章 緒論...1
1.1 前言...1
1.2 研究動機與目的...1
1.3 論文架構...2
第二章 光通訊研究背景...3
2.1 正交分頻多工...3
2.1.1 調變技術...4
2.1.2 誤差向量幅度...6
2.2 光纖...6
2.3 光纖光柵...8
2.3.1 光纖光柵介紹...8
2.3.2 光纖布拉格光柵介紹...8
2.4 摻鉺光纖放大器...10
2.5 光耦合器...10
2.6 光學極化狀態...11
2.7 光循環器介紹...13
2.8 調變...14
2.9 光檢測器介紹...15
第三章 共振光系統介紹與文獻探討...16
3.1 共振光系統介紹...16
3.2 文獻探討...17
3.2.1 共振光文獻探討...17
第四章 實驗內容與討論...21
4.1 實驗設備...21
4.2 雷射架構...22
4.2.1 雷射基本架構...22
4.2.2 雷射光源之無線光纖通訊架構...27
4.2.3 雷射光源之長距離（1km）光纖通訊架構...32
4.3 共振光系統架構...38
4.3.1 共振光之光纖通訊架構...38
4.3.2 共振光之無線光纖通訊架構...43
4.3.3 共振光之短距離（100m）光纖通訊架構...48
4.3.4 共振光之長距離（1km）光纖通訊架構...53
第五章 結論...58
參考文獻...59

[1] Ö. Johan et al., "A high-speed modulated retro-reflector communication link with a transmissive modulator in a cat's eye optics arrangement," in Proc.SPIE, 2007, vol. 6736, doi: 10.1117/12.737959. [Online]. Available: https://doi.org/10.1117/12.737959
[2]D. Killinger, "Free Space Optics for Laser Communication Through the Air," Opt. Photon. News, vol. 13, no. 10, pp. 36-42, 2002/10/01 2002, doi: 10.1364/OPN.13.10.000036.
[3]W. Chen, S. Zhao, Q. Shi, and R. Zhang, "Resonant Beam Charging-Powered UAV-Assisted Sensing Data Collection," IEEE Transactions on Vehicular Technology, vol. 69, no. 1, pp. 1086-1090, 2020, doi: 10.1109/TVT.2019.2950463.
[4]W. Fang, Q. Zhang, Q. Liu, J. Wu, and P. Xia, "Fair Scheduling in Resonant Beam Charging for IoT Devices," IEEE Internet of Things Journal, vol. 6, no. 1, pp. 641-653, 2019, doi: 10.1109/JIOT.2018.2853546.
[5]M. Xiong, Q. Liu, M. Liu, X. Wang, and H. Deng, "Resonant Beam Communications With Photovoltaic Receiver for Optical Data and Power Transfer," IEEE Transactions on Communications, vol. 68, no. 5, pp. 3033-3041, 2020, doi: 10.1109/TCOMM.2020.2973962.
[6]K. O. Hill, Y. Fujii, D. C. Johnson, and B. S. Kawasaki, "Photosensitivity in optical fiber waveguides: Application to reflection filter fabrication," Applied Physics Letters, vol. 32, no. 10, pp. 647-649, 1978/05/15 1978, doi: 10.1063/1.89881.
[7]S.HWang, "TheOptical Phase Grating Diffraction in a Quasistatic Electric-Field-Biased Nematic-Liquid-Crystal Film," National Science Council microfilm Group, Taipei, Taiwan, 1990.
[8]G. N. Watson, "A Treatise on the Theory of Bessel Functions," University Press, England, U.K., 1958.
[9]L. R. R.J. Mears, I.M. Jauncey and D.N. Payne, "Low-Noise Erbium-Doped Fibre Amplifier at 1.54μm," Electron. Lett, pp. 1026–1028, 1987.
[10]L. R. R.J. Mears, S.B. Poole, and D.N. Payne, "Low-Threshold Tunable CW and Q-Switched Fiber Laser Operating at 1.55μm," Electron. Lett , pp. 159-160, 1986.
[11]黃柏諺, "雙向極化多工技術於無線光通訊傳輸系統之應用," 國立虎尾科技大學光電與材料科技研究所論文, 2017.
[12]K. Sung-Man and K. Seong-Min, "Wireless optical energy transmission using optical beamforming," Optical Engineering, vol. 52, no. 4, pp. 1-6, 4/1 2013, doi: 10.1117/1.OE.52.4.043205.
[13]黃柏融, "結合光纖雷射與混合式極化/光分碼多工於無線光通訊之研究," 國立虎尾科技大學光電與材料科技研究所論文, 2015.
[14]V. Iyer, E. Bayati, R. Nandakumar, A. Majumdar, and S. Gollakota, "Charging a Smartphone Across a Room Using Lasers," Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, vol. 1, pp. 1-21, 01/08 2018, doi: 10.1145/3161163.
[15]C.-W. Wu, J. Wang, and C.-G. Huang, "A coupled model on energy conversion in laser power beaming," Journal of Power Sources, vol. 393, pp. 211-216, 2018/07/31/ 2018, doi: https://doi.org/10.1016/j.jpowsour.2018.05.010.
[16] P. K. Sharma et al., "Performance of vertical multi junction solar cell for long distance wireless power transfer using high intensity laser beam," in 2017 IEEE 8th Annual Ubiquitous Computing, Electronics and Mobile Communication Conference (UEMCON), 19-21 Oct. 2017 2017, pp. 553-559, doi: 10.1109/UEMCON.2017.8249112.
[17]V. W. S. Chan, "Free-Space Optical Communications," Journal of Lightwave Technology, vol. 24, no. 12, pp. 4750-4762, 2006/12/01 2006. [Online]. Available: http://opg.optica.org/jlt/abstract.cfm?URI=jlt-24-12-4750.
[18]C. Sun, X. Gao, J. Wang, Z. Ding, and X. G. Xia, "Beam Domain Massive MIMO for Optical Wireless Communications With Transmit Lens," IEEE Transactions on Communications, vol. 67, no. 3, pp. 2188-2202, 2019, doi: 10.1109/TCOMM.2018.2883622.
[19]J. M. Kahn and J. R. Barry, "Wireless infrared communications," Proceedings of the IEEE, vol. 85, no. 2, pp. 265-298, 1997, doi: 10.1109/5.554222.
[20]A. Al-Kinani, C. X. Wang, L. Zhou, and W. Zhang, "Optical Wireless Communication Channel Measurements and Models," IEEE Communications Surveys & Tutorials, vol. 20, no. 3, pp. 1939-1962, 2018, doi: 10.1109/COMST.2018.2838096.
[21]M. Xiong et al., "Resonant Beam Communications With Echo Interference Elimination," IEEE Internet of Things Journal, vol. 8, no. 4, pp. 2875-2885, 2021, doi: 10.1109/JIOT.2020.3020908.
[22]S. Junique, D. Agren, W. Qin, S. Almqvist, B. Noharet, and J. Y. Andersson, "A Modulating retro-reflector for free-space optical communication," IEEE Photonics Technology Letters, vol. 18, no. 1, pp. 85-87, 2006, doi: 10.1109/LPT.2005.860388.
[23]F. E. Peña-Arellano and C. C. Speake, "Mirror tilt immunity interferometry with a cat’s eye retroreflector," Appl. Opt., vol. 50, no. 7, pp. 981-991, 2011/03/01 2011, doi: 10.1364/AO.50.000981.
[24]Q. Zhang, G. Wang, J. Chen, G. B. Giannakis, and Q. Liu, "Mobile Energy Transfer in Internet of Things," IEEE Internet of Things Journal, vol. 6, no. 5, pp. 9012-9019, 2019, doi: 10.1109/JIOT.2019.2926333.