Phase-locked dual-frequency microwave signal generation in an optoelectronic oscillator based on frequency mixing mutual injection

An approach to generating stable phase-locked dual-frequency microwave signals is proposed and demonstrated based on a dual-passband optoelectronic oscillator (OEO). Mode gain competition is broken by employing frequency mixing mutual injection effect to realize phase locking between the two oscilla...

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Veröffentlicht in:Optics express 2024-04, Vol.32 (8), p.13825-13835
Hauptverfasser: Fu, Zhenwei, Zeng, Zhen, Tian, Huan, Lyu, Weiqiang, Zhang, Lingjie, Zhang, Yaowen, Zhang, Zhiyao, Zhang, Shangjian, Zhang, Yali, Li, Heping, Liu, Yong
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container_end_page 13835
container_issue 8
container_start_page 13825
container_title Optics express
container_volume 32
creator Fu, Zhenwei
Zeng, Zhen
Tian, Huan
Lyu, Weiqiang
Zhang, Lingjie
Zhang, Yaowen
Zhang, Zhiyao
Zhang, Shangjian
Zhang, Yali
Li, Heping
Liu, Yong
description An approach to generating stable phase-locked dual-frequency microwave signals is proposed and demonstrated based on a dual-passband optoelectronic oscillator (OEO). Mode gain competition is broken by employing frequency mixing mutual injection effect to realize phase locking between the two oscillation signals, which is achieved by applying a single-tone signal to a microwave mixer in the OEO cavity. In addition, a dual-loop configuration with balanced detection is utilized to ensure a high side mode suppression ratio (SMSR) and ultra-low phase noise, which also enhances the stability of the generated signal. In the experiment, a phase-locked dual-frequency microwave signal at 9.9982 GHz and 10.1155 GHz is generated by using the proposed OEO scheme. The SMSR and the phase noise are 75 dB and -141 dBc/Hz@10 kHz, respectively. Additionally, the Allan deviation of the generated signal is in the order of 10 @1 s. These parameters are superior to those based on the same OEO but with a single-loop configuration, which are also compared in detail.
doi_str_mv 10.1364/OE.520158
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title Phase-locked dual-frequency microwave signal generation in an optoelectronic oscillator based on frequency mixing mutual injection
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