Photonics-Assisted Bandwidth-Doubling Dual-Chirp Microwave Signal Generation With Freely-Tunable Central Frequency

被引：15

作者：

Zhang, Lingjie ^{[1
]}

Zeng, Zhen ^{[1
]}

Zhang, Yaowen ^{[1
]}

Zhang, Zhiyao ^{[1
]}

Sun, Bao ^{[1
]}

Zhang, Shangjian ^{[1
]}

Zhang, Yali ^{[1
]}

Liu, Yong ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Sch Optoelect Sci & Engn, Chengdu 610054, Peoples R China

来源：

IEEE PHOTONICS JOURNAL | 2020年 / 12卷 / 04期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Dual-chirp microwave signal; pulse compression; matched filtering; range-Doppler coupling effect; WAVE-FORM GENERATION; FIBER;

D O I：

10.1109/JPHOT.2020.3001568

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 photonics-assisted dual-chirp microwave signal generation scheme is proposed based on electro-optic modulation and heterodyne detection. The dual-chirp microwave signal is generated by heterodyne beating between a dual-chirp optical waveform and a frequency-shifted optical carrier, where the dual-chirp optical waveform is obtained by applying a baseband symmetric-triangle linear frequency modulated signal to a Mach-Zehnder modulator biased at the minimum transmission point, and the frequency-shifted optical carrier is obtained by carrier-suppressed single-sideband modulation in a dual-parallel Mach-Zehnder modulator (DPMZM) with the assistance of an electronic 90 degrees hybrid. The bandwidth of the generated dual-chirp microwave signal is twice of that of the input baseband signal, and the central frequency can be tuned by varying the frequency of the single-tone microwave signal applied to the DPMZM. Both numerical simulation and experiment are carried out to demonstrate the proposed scheme. In the simulation, a dual-chirp microwave signal with a center frequency of 15 GHz and a bandwidth of 6 GHz is generated. In the proof-of-concept experiment, dual-chirp microwave signals centered at 1.5 GHz and with bandwidth of 100 MHz and 200 MHz are generated, which verifies the feasibility of the proposed scheme.

引用

页数：11

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