本文選題：光調制 + 電光效應　； 參考：《長春理工大學》2016年碩士論文

【摘要】：激光通信已經成為未來信息傳遞領域一個不可替代的技術之一,要想讓光波作為信息的載體來傳遞信息,就必須對光波進行調制,這個過程中就需要使用光調制器,這樣就可以有效的實現基帶信號加載于激光載波上進行通信傳輸。在眾多光調制器中,基于電光效應的電光調制器以其優(yōu)良的物理特性成為信號調制發(fā)射過程中一個核心的功能器件,在對信號進行光調制過程中發(fā)揮著不可替代的作用,所以基于電光調制器的調制技術研究工作是未來激光通信領域不可回避的重要技術課題。而相位調制技術作為電光調制器進行相位調制的一種關鍵技術,其性能對于高速率光通信具有不可替代的應用前景,基于相位調制的各種編碼格式提高了信號的傳輸性能,是激光通信網絡中應用最廣的的調制方式之一,主要應用在高速率大容量光通信領域中。本文對BPSK、DPSK和DQPSK的調制原理進行深入分析,通過Optisystem光通信仿真軟件分別對三種調制方式組成的調制系統(tǒng)進行了在線仿真,仿真結果表明DQPSK的相位調制方式性能最優(yōu),但功能實現最為復雜,而BPSK相位調制方式作為另外兩種調制方式的基礎,基本滿足10Gps調制速率的傳輸要求,實現性更出色一些。所以本文最后選擇BPSK調制系統(tǒng)為例進行了系統(tǒng)設計及實驗測試,通過實驗測量結果顯示調制信號的結果與仿真結果基本相同,為DPSK以及DQPSK相位調制系統(tǒng)的設計打好了基礎,對探索空間激光通信新技術具有很大的理論意義和實用價值,最后對整個調制系統(tǒng)進行了系統(tǒng)評價,并對實驗過程中的誤差進行了分析,通過分析表明窄線寬穩(wěn)定的偏置電壓是減少實驗誤差的有效途徑,對后續(xù)其他調制系統(tǒng)的設計和測試具有很好的借鑒意義和實用意義。
[Abstract]:Laser communication has become one of the irreplaceable technologies in the field of information transmission in the future. In order for light wave to be used as the carrier of information, it is necessary to modulate the light wave. In this process, we need to use optical modulator. In this way, the baseband signal can be loaded on the laser carrier for communication transmission. In many optical modulators, electro-optic modulator based on electro-optic effect has become a core functional device in signal modulation and transmission process because of its excellent physical characteristics, and plays an irreplaceable role in the process of signal optical modulation. Therefore, the research work of modulation technology based on electro-optic modulator is an important technical subject in future laser communication field. As a key technology of phase modulation in electro-optic modulator, phase modulation technology has an irreplaceable application prospect for high rate optical communication, and various coding formats based on phase modulation can improve the transmission performance of signal. As one of the most widely used modulation methods in laser communication networks, it is mainly used in the field of high speed and large capacity optical communication. In this paper, the modulation principle of BPSK DPSK and DQPSK is deeply analyzed, and the on-line simulation of the modulation system composed of three modulation modes is carried out by using Optisystem optical communication simulation software. The simulation results show that the phase modulation mode of DQPSK has the best performance. However, the function realization is the most complex, and the BPSK phase modulation, as the basis of the other two modulation modes, basically meets the transmission requirements of 10GPS modulation rate, and the realization is better. So this paper chooses the BPSK modulation system as an example to carry on the system design and the experiment test, through the experiment measurement result, the modulation signal result is basically the same as the simulation result, has laid the foundation for the DPSK and the DQPSK phase modulation system design. It is of great theoretical significance and practical value to explore the new space laser communication technology. Finally, the modulation system is systematically evaluated, and the error in the experiment is analyzed. The analysis shows that the bias voltage with stable narrow linewidth is an effective way to reduce the experimental error, and it has good reference and practical significance for the design and test of other modulation systems.
【學位授予單位】：長春理工大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TN929.1
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本文編號：1996141