Ta2O5 films are prepared on BK7 substrates with conventional electron beam evaporation deposition. The effects of SiO2 protective layers and annealing on the laser-induced damage threshold (LIDT) of the films are investigated. The results show that SiO2 p
电缆网络故障频发会给社会生产与生活造成严重的经济损失和安全隐患,因此需要对电缆网络进行实时监控以确保其正常运行。提出了利用多路宽带准正交的混沌脉冲位置调制信号(Chaotic Pulse Position Modulation, CPPM)结合分布式检测方法进行电缆网络故障检测,通过对构建的Double-Y形网络中的故障进行检测,从而证明该方法的可行性。实验结果表明:该方法不仅能够有效解决单端检测中故障定位模糊的问题,而且能够克服分布式检测中信号相互干扰的问题,准确高效地对电缆网络故障进行定位,并能够进行
Nonclassical optical frequency combs find tremendous utility in quantum information and high-precision quantum measurement. The characteristics of a type-I synchronously pumped optical parametric oscillator with the