【摘要】：寬帶模擬光纖傳輸系統(tǒng)因為相較于傳統(tǒng)同軸電纜傳輸方式具有巨大優(yōu)勢,而得到世界各國越來越多的重視。其特點包括質(zhì)量輕、體積小、損耗小、高帶寬和抗電磁干擾能力強等。尤其是在機載、艦載和星載等空間狹小環(huán)境中的應用,其優(yōu)勢就顯得更加明顯。寬帶模擬光纖傳輸系統(tǒng)是微波學和光子學的一個結(jié)合,屬于微波光子學的一個重要內(nèi)容。對于寬帶模擬光纖傳輸系統(tǒng)的研究主要集中在如何提高其增益、降低噪聲系數(shù)和提高無雜散動態(tài)范圍,尤其是如何提高無雜散動態(tài)范圍。因此,本文對基于相位調(diào)制單邊帶方式的寬帶模擬光纖傳輸系統(tǒng)進行了研究,試圖提高系統(tǒng)性能。論文研究工作分為如下四個部分。第一部分,指出模擬光纖傳輸系統(tǒng)的研究背景和意義,分析了其國內(nèi)外的研究現(xiàn)狀,調(diào)研了目前國內(nèi)外的研究成果并進行了討論。第二部分,研究了模擬光纖傳輸系統(tǒng)的模型,討論了其主要器件以及性能指標,為后面的研究提供理論基礎。第三部分,針對相位調(diào)制單邊帶系統(tǒng)進行了研究。首先對各性能指標進行了理論分析并仿真分析了系統(tǒng)參數(shù)對它們的影響,為系統(tǒng)設計提供理論基礎。其次,分析了中心載波抑制對于相位調(diào)制單邊帶系統(tǒng)的影響,通過理論分析和實驗驗證得到最佳中心載波抑制比例,以此獲得了系統(tǒng)最佳噪聲系數(shù)、增益以及無雜散動態(tài)范圍。此外,提出了基于波分復用系統(tǒng)(Wavelength Division Multiplex,WDM)的雙相位調(diào)制器并聯(lián)的高線性模擬光纖傳輸系統(tǒng)新思路,通過理論分析和實驗驗證得到系統(tǒng)的無雜散動態(tài)范圍提高7dB。最后,設計了一個滿足2-6GHz的低噪聲微波放大器,通過仿真分析,驗證了該放大器能有效滿足指標要求。第四部分,對相位調(diào)制單邊帶系統(tǒng)進行了實驗研究。相位調(diào)制單邊帶利用了相位調(diào)制器的優(yōu)點并且可以減少光纖色散的影響。通過測試其各個性能指標,發(fā)現(xiàn)相位調(diào)制單邊帶系統(tǒng)在損失一個邊帶信息的情況下,可以達到理想的性能。
[Abstract]:Broadband analog optical fiber transmission system has been paid more and more attention in the world because it has great advantages over the traditional coaxial cable transmission mode. Its characteristics include light weight, small volume, small loss, high bandwidth and strong anti-electromagnetic interference ability. Especially in small space environment, such as airborne, shipborne and spaceborne, its advantages are more obvious. Broadband analog optical fiber transmission system is a combination of microwave science and photonics, and belongs to an important content of microwave photonics. The research of broadband analog optical fiber transmission system mainly focuses on how to improve its gain, reduce noise figure and improve the spurious free dynamic range, especially how to improve the spurious free dynamic range. Therefore, the broadband analog optical fiber transmission system based on phase modulation single-sideband mode is studied in this paper, in order to improve the performance of the system. The research work is divided into four parts as follows. In the first part, the research background and significance of analog optical fiber transmission system are pointed out, the research status at home and abroad is analyzed, and the research results at home and abroad are investigated and discussed. In the second part, the model of analog optical fiber transmission system is studied, and its main devices and performance indexes are discussed, which provides a theoretical basis for future research. In the third part, the phase modulation SSB system is studied. Firstly, the influence of system parameters on each performance index is analyzed theoretically and simulated, which provides a theoretical basis for the design of the system. Secondly, the influence of the central carrier suppression on the phase modulated SSB system is analyzed. The optimal central carrier suppression ratio is obtained by theoretical analysis and experimental verification, and the optimal noise figure, gain and spurious free dynamic range of the system are obtained. In addition, a new idea of parallel high linear analog optical fiber transmission system based on dual phase modulator based on wavelength division multiplexing (Wavelength Division Multiplex,WDM) is proposed. The theoretical analysis and experimental verification show that the dynamic range of the system without spurious can be increased by 7dB. Finally, a low noise microwave amplifier satisfying 2-6GHz is designed. The simulation results show that the amplifier can effectively meet the requirements. In the fourth part, the phase modulation SSB system is studied experimentally. The single sideband of phase modulation takes advantage of the advantages of phase modulator and can reduce the effect of fiber dispersion. By testing each performance index, it is found that the phase modulated SSB system can achieve an ideal performance when a sideband information is lost.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.11

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本文編號：2453719