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1 November 2021 High-stable photonics-based frequency-quadrupled LFM signal generation for radar applications
Dingding Liang, Qingbo Liu, Lizhong Jiang, Dong Ma, Yang Chen
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Proceedings Volume 12057, Twelfth International Conference on Information Optics and Photonics; 120570D (2021) https://doi.org/10.1117/12.2603973
Event: Twelfth International Conference on Information Optics and Photonics, 2021, Xi'an, China
Abstract
A high-stable photonics-based linearly frequency-modulated (LFM) signal generation approach for radar applications is proposed and experimentally demonstrated. A broadband LFM signal is generated by a photonic frequency quadrupler consisting of a Mach-Zehnder modulator and a fiber Bragg grating (FBG)-based optical notch filter. The stability of the generated signal is improved by using modulator bias control, laser wavelength control, and FBG temperature control. An experiment is performed. A Ka-band LFM signal with an instantaneous bandwidth of 4 GHz is generated. Meanwhile, inverse synthetic aperture radar (ISAR) imaging and target distance measurement are implemented by using a generated 1-GHz bandwidth LFM signal. The LFM signal remains stable during the four-hour experiment.
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Dingding Liang, Qingbo Liu, Lizhong Jiang, Dong Ma, and Yang Chen "High-stable photonics-based frequency-quadrupled LFM signal generation for radar applications", Proc. SPIE 12057, Twelfth International Conference on Information Optics and Photonics, 120570D (1 November 2021); https://doi.org/10.1117/12.2603973
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KEYWORDS
Radar
Signal generators
Fiber Bragg gratings
Modulators
Distance measurement
Imaging systems
Radar imaging
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