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28 March 2023 Multiband microwave waveforms transmitting system using dual fiber combs
Wenhao Xiong, Chuanfei Yao, Pingxue Li, Feiyu Zhu, Ruonan Lei
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Proceedings Volume 12601, SPIE-CLP Conference on Advanced Photonics 2022; 1260108 (2023) https://doi.org/10.1117/12.2666331
Event: SPIE-CLP Conference on Advanced Photonics 2022, 2022, Online Only
Abstract
In this work, a multiband microwave waveforms transmitting system was demonstrated based on all-optical dual fiber combs. Two optical fiber frequency combs via cascaded four waves mixing process ensure the coherence of the system by sharing the pump light. The high-speed frequency tuning of the pump laser will be transferred to each newly generated comb line through the nonlinear effect in the fiber. The comb pairs of the same order obtained through filtering transform the frequency chirp in the optical domain to the frequency chirp in the electrical domain after being beat on the PD. By changing the parameters of the control signal, the center frequency, bandwidth, PRF and envelope of the multi band microwave signal can be flexibly reconfigurable. Thanks to the coherence of dual optical frequency combs, microwave signals all show excellent line-type, high signal to noise ratio and no burrs. As a result, the chirped microwave signals of triangle wave, sine wave and sawtooth wave types are obtained at the repetition rate of 500 Hz. Overall, multi-band chirped microwave generation system based on all-optical system provides a practical device for transmitting and receiving multi band radar.
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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Wenhao Xiong, Chuanfei Yao, Pingxue Li, Feiyu Zhu, and Ruonan Lei "Multiband microwave waveforms transmitting system using dual fiber combs", Proc. SPIE 12601, SPIE-CLP Conference on Advanced Photonics 2022, 1260108 (28 March 2023); https://doi.org/10.1117/12.2666331
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KEYWORDS
Microwave radiation
Frequency combs
Fiber lasers
Four wave mixing
Signal to noise ratio
Optical filters
Signal generators
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