基于TOEO的线性调频微波脉冲光产生方法

Photonic generation of linear frequency-chirped microwave pulse based on TOEO

针对单元模块技术直接组合应用于雷达系统所导致的信号质量下降问题,提出了一种基于可调谐光电振荡器（TOEO）的线性调频微波脉冲光产生方法.首先利用TOEO的频率可调谐性来改变微波信号的载频,然后通过改变加载在双驱动马赫-增德尔调制器（DDMZM）上的调制信号,使系统产生相位连续可调的线性调频微波脉冲,最后进行了仿真实验.仿真结果表明,系统频率调谐范围达几十吉赫兹,相位在-180~180°范围内连续可调.

The signal quality would deteriorate as the direct combination of unit module technique is applied to the radar system. This paper proposes a sort of photonic generation method for linear frequency-chirped microwave pulse based on the tunable optoelectronic oscillator（TOEO）. Firstly, the carrier microwave signals can be varied by using the tunability of the frequency of the TOEO, next, the linear frequency-chirped microwave pulse whose phase is continuously adjustable is generated over the system by changing the modulating signal applied to the double-drive Mach-Zehnder modulator（DDMZM）. And finally, the simulation is performed, where the results show that the tunable range of system frequency is up to tens of GHz, and the phase continuously tunable from-180o to 180o.