發(fā)布時(shí)間：2018-06-08 14:38

  本文選題：光調(diào)制 + 電光效應(yīng)　； 參考：《長(zhǎng)春理工大學(xué)》2016年碩士論文

【摘要】：激光通信已經(jīng)成為未來(lái)信息傳遞領(lǐng)域一個(gè)不可替代的技術(shù)之一,要想讓光波作為信息的載體來(lái)傳遞信息,就必須對(duì)光波進(jìn)行調(diào)制,這個(gè)過(guò)程中就需要使用光調(diào)制器,這樣就可以有效的實(shí)現(xiàn)基帶信號(hào)加載于激光載波上進(jìn)行通信傳輸。在眾多光調(diào)制器中,基于電光效應(yīng)的電光調(diào)制器以其優(yōu)良的物理特性成為信號(hào)調(diào)制發(fā)射過(guò)程中一個(gè)核心的功能器件,在對(duì)信號(hào)進(jìn)行光調(diào)制過(guò)程中發(fā)揮著不可替代的作用,所以基于電光調(diào)制器的調(diào)制技術(shù)研究工作是未來(lái)激光通信領(lǐng)域不可回避的重要技術(shù)課題。而相位調(diào)制技術(shù)作為電光調(diào)制器進(jìn)行相位調(diào)制的一種關(guān)鍵技術(shù),其性能對(duì)于高速率光通信具有不可替代的應(yīng)用前景,基于相位調(diào)制的各種編碼格式提高了信號(hào)的傳輸性能,是激光通信網(wǎng)絡(luò)中應(yīng)用最廣的的調(diào)制方式之一,主要應(yīng)用在高速率大容量光通信領(lǐng)域中。本文對(duì)BPSK、DPSK和DQPSK的調(diào)制原理進(jìn)行深入分析,通過(guò)Optisystem光通信仿真軟件分別對(duì)三種調(diào)制方式組成的調(diào)制系統(tǒng)進(jìn)行了在線(xiàn)仿真,仿真結(jié)果表明DQPSK的相位調(diào)制方式性能最優(yōu),但功能實(shí)現(xiàn)最為復(fù)雜,而B(niǎo)PSK相位調(diào)制方式作為另外兩種調(diào)制方式的基礎(chǔ),基本滿(mǎn)足10Gps調(diào)制速率的傳輸要求,實(shí)現(xiàn)性更出色一些。所以本文最后選擇BPSK調(diào)制系統(tǒng)為例進(jìn)行了系統(tǒng)設(shè)計(jì)及實(shí)驗(yàn)測(cè)試,通過(guò)實(shí)驗(yàn)測(cè)量結(jié)果顯示調(diào)制信號(hào)的結(jié)果與仿真結(jié)果基本相同,為DPSK以及DQPSK相位調(diào)制系統(tǒng)的設(shè)計(jì)打好了基礎(chǔ),對(duì)探索空間激光通信新技術(shù)具有很大的理論意義和實(shí)用價(jià)值,最后對(duì)整個(gè)調(diào)制系統(tǒng)進(jìn)行了系統(tǒng)評(píng)價(jià),并對(duì)實(shí)驗(yàn)過(guò)程中的誤差進(jìn)行了分析,通過(guò)分析表明窄線(xiàn)寬穩(wěn)定的偏置電壓是減少實(shí)驗(yàn)誤差的有效途徑,對(duì)后續(xù)其他調(diào)制系統(tǒng)的設(shè)計(jì)和測(cè)試具有很好的借鑒意義和實(shí)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(xué)位授予單位】：長(zhǎng)春理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：TN929.1
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本文編號(hào)：1996141