基于光纤布拉格光栅的超宽带信号产生方法分析

超宽带信号因其具有穿透小尺度障碍物、高时间分辨力和高速数据传输率等特点,被广泛应用于传感器网络、医疗监控、精准导航、车载雷达等民用和军用系统中,基于全光分析方法产生超宽带信号已经成为目前国内外的研究热点。在以光纤布拉格光栅为核心器件的系统模型上进行了理论和仿真分析,在系统的光电探测器输出端产生了半高宽约为41 ps,功率谱密度小于-45 dB/MHz的超宽带信号。并分析了单模光纤长度对产生的超宽带信号的影响。

Analysis of UWB signal generating method based on fiber Bragg grating

Ultra-wideband signal has been widely used in civil and military systems such as sensor networks,medical monitoring,precision navigation and vehicle radar,because of its capacity of penetrating small-scale obstacles,high temporal resolution and high-speed rate of data transfer.The researches on ultra-wideband signal generating method based on the all-optical analysis have become a research hotspot at home and abroad.Based on the theoretical and simulating analysis of the system model with optical fiber Bragg grating as its core device,this research shows that the half-high width of ultra-wideband signal produced by the photodetector is about 41 ps,and the power spectral density is less than -45 dB/MHz.And the effect of single-mode fiber length on ultra-wideband signal has also been analyzed.