首页|Bandwidth-reduced Brillouin optical time-domain analy-sis based on a quarter of the frequency of modulation
Bandwidth-reduced Brillouin optical time-domain analy-sis based on a quarter of the frequency of modulation
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
万方数据
Aiming at the problem of high requirement for the signal generator in the Brillouin optical time-domain analysis(BOTDA)system,a quarter of the Brillouin frequency shift(BFS)of modulation is proposed to reduce the required bandwidth of the sensing system.A functional model for solving the intensity of each-order sideband of the output light of electro-optic modulator(EOM)is proposed and applied,so the spectrum with suppressed the carrier and the first-order sidebands while maximizing the second-order sidebands is obtained.Compared with the latest scheme,the intensity of the second-order sidebands is increased by 21.1％based on this functional model.In the experiment,the second-order upper sideband and the second-order lower sideband are used as continuous wave(CW)probe light and pump pulse light,respectively,which ultimately reduces the required bandwidth of radio frequency(RF)signal sources to a quarter of the BFS(reduced from～11 GHz to～2.75 GHz),and the frequency sweep range is also reduced to a quarter of the original.
万方数据
