基于MPZ-LN-20电光相位调制器的调制技术研究

发布时间：2018-06-08 14:38

  本文选题：光调制 + 电光效应　； 参考：《长春理工大学》2016年硕士论文

【摘要】：激光通信已经成为未来信息传递领域一个不可替代的技术之一,要想让光波作为信息的载体来传递信息,就必须对光波进行调制,这个过程中就需要使用光调制器,这样就可以有效的实现基带信号加载于激光载波上进行通信传输。在众多光调制器中,基于电光效应的电光调制器以其优良的物理特性成为信号调制发射过程中一个核心的功能器件,在对信号进行光调制过程中发挥着不可替代的作用,所以基于电光调制器的调制技术研究工作是未来激光通信领域不可回避的重要技术课题。而相位调制技术作为电光调制器进行相位调制的一种关键技术,其性能对于高速率光通信具有不可替代的应用前景,基于相位调制的各种编码格式提高了信号的传输性能,是激光通信网络中应用最广的的调制方式之一,主要应用在高速率大容量光通信领域中。本文对BPSK、DPSK和DQPSK的调制原理进行深入分析,通过Optisystem光通信仿真软件分别对三种调制方式组成的调制系统进行了在线仿真,仿真结果表明DQPSK的相位调制方式性能最优,但功能实现最为复杂,而BPSK相位调制方式作为另外两种调制方式的基础,基本满足10Gps调制速率的传输要求,实现性更出色一些。所以本文最后选择BPSK调制系统为例进行了系统设计及实验测试,通过实验测量结果显示调制信号的结果与仿真结果基本相同,为DPSK以及DQPSK相位调制系统的设计打好了基础,对探索空间激光通信新技术具有很大的理论意义和实用价值,最后对整个调制系统进行了系统评价,并对实验过程中的误差进行了分析,通过分析表明窄线宽稳定的偏置电压是减少实验误差的有效途径,对后续其他调制系统的设计和测试具有很好的借鉴意义和实用意义。
[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.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.1
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本文编号：1996141