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近年来超宽带(UWB)通信技术迅猛发展,在测量、雷达技术、民用和军事无线通信中有着重要的应用,UWB-over-fiber技术已经成为目前研究的热点,其中就包括UWB脉冲信号的产生方法。区别于传统的电子学方法,光子学产生方法不受电子瓶颈制约,可以实现很高的带宽,并且具有抗电磁干扰、重量轻、结构紧凑的优点。通过对比国内外本领域研究成果,讨论及总结了以下三种原理的UWB脉冲信号的光学生成方法:1)相位调制-强度调制转换(PM-IM);2)半导体光放大器(SOA)的非线性效应;3)频谱塑形和色散所致频域-时域映射,然后对各种方案进行了对比分析。
UWB communication technology has been developing rapidly in recent years. It has an important application in measurement, radar technology, civil and military wireless communications. UWB-over-fiber technology has become a hot spot in the research, including UWB pulse signal generation method. Different from the traditional electronic methods, the photon generation method is not subject to the electronic bottleneck, can achieve high bandwidth, and has the advantages of anti-electromagnetic interference, light weight and compact structure. By comparing the domestic and foreign research results in the field, the following three principles of UWB pulse signal optical generation method are discussed and summarized: 1) phase modulation - intensity modulation conversion (PM-IM); 2) semiconductor optical amplifier Linear effects; 3) frequency-domain-time domain mapping due to spectral shaping and dispersion, and then a comparative analysis of various schemes.