Variable-chirped microwave waveform generator based on reconfigurable microwave photonic filter

Variable-chirped microwave waveform generator based on reconfigurable microwave photonic filter
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基于可重构微波光子滤波器的可变啁啾微波波形发生器

DOI:
10.1117/1.oe.53.9.095106
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发表时间:
2014-09
影响因子:
1.3
通讯作者:
Dalei Chen, Rong Wang, Tao Pu,* Tao Fang, Peng Xiang, etc
Dalei Chen, Rong Wang, Tao Pu,* Tao Fang, Peng Xiang, etc
中科院分区:
工程技术4区
文献类型:
--
作者:
Dalei Chen, Rong Wang, Tao Pu,* Tao Fang, Peng Xiang, etc

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抽象的。提出并演示了一种使用具有二次相位响应的光子微波延迟线滤波器 (PMDLF) 生成啁啾微波信号的光学方法。在该方案中,使用窄带高斯脉冲作为原始信号。为了消除对宽带原始微波无啁啾信号的需要,使用混频器和射频信号对原始信号的频谱进行上变频,并对色散曲线进行调谐以最小化光纤色散引起的衰减。然后可以通过非均匀间隔的 PMDLF 重建所需的频率响应。由于原始信号的大部分功率可以绕过滤波器,因此所生成的啁啾微波信号的功率将会增加。提供了中心频率为10 GHz的期望频率响应的重构示例,并通过数值模拟演示了相应的啁啾微波信号的生成。
Abstract. An optical approach to generating chirped microwave signal using a photonic microwave delay-line filter (PMDLF) with a quadratic phase response is proposed and demonstrated. In this scheme, a narrow band Gaussian pulse is used as the original signal. In order to eliminate the need for a wideband original microwave chirped-free signal, a mixer and a radio frequency signal are used to up-convert the spectrum of the original signal and the dispersion curve is tuned to minimize the attenuation caused by the fiber dispersion. Then the required frequency response can be reconstructed by a nonuniformly spaced PMDLF. Since the majority of the power of the original signal can bypass the filter, the power of the generated chirped microwave signal will be increased. A reconstruction example of a desired frequency response with a central frequency of 10 GHz is provided, and the generation of the corresponding chirped microwave signal is demonstrated by numerical simulations.
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发表时间: 2007-12
期刊: Optics letters
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