基于双滤波器的全光超宽带脉冲调制研究

Research of all-optical ultra-wideband pulse modulation based on double filter

在分析基于超宽带(ultra-wideband,UWB)与光纤技术结合的技术原理的基础上,提出了一种新颖灵活的全光方案,实现了UWB极性反转的UWB单循环脉冲和双循环脉冲,利用改变预编码和系统光程差,得到UWB脉冲形状调制序列,并对该序列的特性进行了相关的研究。仿真结果表明,这种模式在未来的UWB信号光纤接入中具有一定的应用价值。

A simple and flexible photonic scheme for the generation of ultra-wideband （UWB） pulse shape modulation based on ultra-wideband and optical fiber technology is proposed and experimentally demonstrat- ed, the UWB polarity-switchable monocycle is generated at the output of two optical band pass filters by ad- justing the central wavelengths of the dual-filter appropriately. Meanwhile, with a predefined code pattern and controlling the optical path difference of the two monocycle pulses, the pulse shape modulation can be per- formed and its characteristics are studied. Simulation results show that this model has a certain value on the future ultra-wideband signals optical access.