Wang Jian, Sun Qizhen, Sun Junqiang, Zhang Weiwei
Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
Opt Express. 2009 Mar 2;17(5):3521-30. doi: 10.1364/oe.17.003521.
We propose and demonstrate a novel approach to optically generate ultrawideband (UWB) monocycle pulses by exploiting the parametric attenuation effect of sum-frequency generation (SFG) in a periodically poled lithium niobate (PPLN) waveguide. The SFG process changes the continuous-wave pump into dark optical pulse pump with undershoot, resulting in the generation of UWB monocycle through the combination of input signal and output pump with proper relative time advance/delay. Pairs of polarity-inverted UWB monocycle pulses meeting the UWB definition of U. S. Federal Communications Commission (FCC, part 15) are successfully obtained in the experiment.
我们提出并演示了一种新颖的方法，通过利用周期性极化铌酸锂（PPLN）波导中倍频产生（SFG）的参量衰减效应来光学产生超宽带（UWB）单周期脉冲。SFG过程将连续波泵浦转换为带有下冲的暗光学脉冲泵浦，通过将输入信号与输出泵浦以适当的相对时间提前/延迟进行组合，从而产生UWB单周期脉冲。在实验中成功获得了符合美国联邦通信委员会（FCC，第15部分）UWB定义的一对极性反转的UWB单周期脉冲。
