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5 December 2024 Low noise carrier switchable microwave linear frequency modulation source based on external modulation method
JinHui Liu, Dongjian Li, Cunxiao Gao, Yu Hu, Zhenhua Hao, Jiansheng Chang
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Proceedings Volume 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024); 134180L (2024) https://doi.org/10.1117/12.3045607
Event: 15th International Conference on Information Optics and Photonics (CIOP2024), 2024, Xi’an, China
Abstract
This paper proposes a scheme for generating microwave linear frequency modulation signals based on electro-optic external modulation. After electro-optic modulation, a single-frequency optical carrier signal generates a series of sidebands. By beating the sideband signal with a reference signal, a single-frequency microwave signal with a fixed carrier frequency can be generated. By replacing the modulation frequency with a sweep signal with a controllable frequency variation range and using a mode-locked pulse light as the carrier wave, a low-noise linear frequency modulation microwave signal output with switchable carrier frequency can be achieved. Through experiments, the carrier frequencies of the output signals reached 1.07 GHz and 5.35 GHz, the phase noise of the signals was lower than -101 dBc/Hz@10 kHz, and the signal-to-noise ratio was higher than 27 dB. The experimental results show that high-performance linear frequency modulation microwave signal output with different carrier frequencies, low noise, and stable phase relationship can be achieved.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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JinHui Liu, Dongjian Li, Cunxiao Gao, Yu Hu, Zhenhua Hao, and Jiansheng Chang "Low noise carrier switchable microwave linear frequency modulation source based on external modulation method", Proc. SPIE 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024), 134180L (5 December 2024); https://doi.org/10.1117/12.3045607
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KEYWORDS
Modulation frequency
Frequency modulation
Laser frequency
Microwave radiation
Mode locking
Microwave photonics
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