Photonic Real-time Fourier Transform Based on Frequency Stretching of RF Signals

被引：0
|
作者：
Ding, Jiewen [1 ]
Zhu, Dan [1 ]
Wang, Zihao [1 ]
Zhang, Bowen [1 ]
Lu, Tao [1 ]
Pan, Shilong [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Elect & Informat Engn, Naning, Peoples R China
来源：
2021 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP) | 2021年
基金：
中国国家自然科学基金;
关键词：
real-time Fourier transform; microwave photonics; frequency stretching;
D O I：
10.1109/MWP53341.2021.9639387
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A photonic real-time Fourier transform (PRTFT) based on frequency stretching of RF signals is proposed and experimentally demonstrated. By using the +/- 2nd sideband modulation of DPMZM, the frequencies of RF signals are stretched. Since the frequency-to-time mapping (FTM) is a linear mapping, the mapped signal is time stretched equivalently. As a result, the frequency resolution is enhanced with the time stretching of the mapped signal, without increasing the 2nd dispersion value of the dispersive media used for FTM. The PRTFT of RF signals has been achieved experimentally within the frequency range of 2-32 GHz. The frequency resolution has been enhanced to 70 MHz for the two-tone RF signals.
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页数：3
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