Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Opt Lett. 2013 Jan 15;38(2):232-4. doi: 10.1364/OL.38.000232.
A simple and flexible photonic scheme for the generation of ultrawideband (UWB) pulse shape modulation based on dual-filter tuning is proposed and experimentally demonstrated. By launching a Gaussian signal into a phase modulator, the UWB polarity-switchable monocycle is generated at the output of two optical bandpass filters by adjusting the central wavelengths of the dual-filter appropriately. The doublet pulses with inverted polarities are obtained by combining the pair of UWB monocycle pulses under proper time delay. Meanwhile, with a predefined code pattern and controlling the optical path difference of the two monocycle pulses, the pulse shape modulation can be performed.
提出并实验演示了一种基于双滤波器调谐的产生超宽带（UWB）脉冲形状调制的简单灵活的光子方案。通过将高斯信号注入相位调制器，通过适当调整双滤波器的中心波长，在两个光带通滤波器的输出端产生 UWB 极性可切换的单周期。通过在适当的时间延迟下组合一对 UWB 单周期脉冲，可以获得极性相反的双脉冲。同时，通过预设的码型并控制两个单周期脉冲的光程差，可以实现脉冲形状调制。
