Broadband Frequency-Hopping Radar With Fourier Domain Mode-Locking Period-One Laser Dynamics

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-06-24 DOI:10.1109/LPT.2025.3582759

Xiaoyue Yu;Fangzheng Zhang;Qing Xiong;Xin Yan;Yansen He;Gong Zhang;Shilong Pan;Yuan Yu

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Abstract

A frequency hopping (FH) radar based on period-one oscillation laser dynamics with Fourier domain mode-locking (FDML) is proposed and experimentally demonstrated. In the transmitter, a broadband FH signal is generated by adjusting injection strength through intensity modulation. By further incorporating an optoelectronic feedback loop with the temporal period of the FH signal matched with its round-trip delay, the frequency stability and accuracy are greatly improved. In the receiver, to reduce the sampling rate and computational complexity, self-referenced frequency down conversion is applied and a kernel function correlation algorithm is adopted in digital signal processing to procure the high-resolution range profile. In the experiment, an FH signal with a bandwidth of 8 GHz is generated, based on which the detections of single-target and two-targets are demonstrated respectively, achieving a range resolution of 2.15 cm. The proposed photonics-based FH radar with FDML-based P1 dynamics for signal generation is supposed to find more applications in further high-resolution radar detection and imaging.

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傅立叶域锁模周期一激光动力学宽带跳频雷达

提出了一种基于一周期振荡激光动力学傅立叶域锁模的跳频雷达，并进行了实验验证。在发射机中，通过强度调制调节注入强度，产生宽带跳频信号。通过进一步加入跳频信号的时间周期与其往返时延相匹配的光电反馈回路，大大提高了频率稳定性和精度。在接收机中，为了降低采样率和计算复杂度，采用自参考频率下变频，并在数字信号处理中采用核函数相关算法获得高分辨率距离像。实验中产生了带宽为8 GHz的跳频信号，在此基础上分别演示了单目标和双目标的检测，距离分辨率达到2.15 cm。所提出的基于光子学的跳频雷达与基于fdml的P1动力学信号产生有望在进一步的高分辨率雷达探测和成像中找到更多的应用。

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.