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Research on All Optical Orthogonal Frequency Division Multiplexing Technique

Author: WangTongGang
Tutor: WenAiJun
School: Xi'an University of Electronic Science and Technology
Course: Optical communication
Keywords: All-optical OFDM MA Zeng modulator MA Zeng interferometer Dispersion compensation
CLC: TN929.11
Type: Master's thesis
Year: 2011
Downloads: 116
Quote: 0
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Abstract


With the increased demand for information transmission rate , the optical transmission system of a single channel rate also increased from 40Gbps 100Gbps or even higher. The higher the rate , the greater the impact of system dispersion , nonlinear effect or the like . Along with OFDM and the combination of the optical transmission have come into being , the same bandwidth circumstances improve spectral efficiency , increase the transmission rate . Proposals from the OS Nianguang OFDM , it has been widespread concern in the field of optical communications , and that it is an important candidate for the transmission system of the 1006 and 1006 levels . In this paper, 160Gbps four carrier optical orthogonal frequency division technology ( all-optical OFDM) study . First Research OFDM as well as all-optical OFDM technology the modem principle and MA Zeng interferometer (MZI) works , and according to the four-carrier optical OFDM demodulation process , derivation and analysis , MA Zeng interferometer (MZI ) the basis of a simplified structure of the optical OFDM signal is demodulated . And further deduced directly for any center frequency carrier optical OFDM demodulation process , and through VPI platform simulation to verify its correctness . And phase characteristics of the interferometer according to the MA Zeng , can be used in the demodulation structure different phase settings , so that the different carrier signals of the demodulation output port . MA Zeng the working principle of the modulator and then study , analysis and derivation, three simple generation interval of four sub-carrier and the carrier to noise ratio is more than 25dB . So that in the modulation signal can be reduced and the use of the number of the light source to generate an optical OFDM , considerably cost savings . Finally, high - speed optical transmission systems of the important factors in the transmission process , and simulation comparison of different dispersion compensation program , the performance of all-optical OFDM signal obtained using 160Gbps four-carrier optical OFDM signal transmission process stage sexual cycle compensation .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Lightwave communications, laser communications > Optical fiber communication
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