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- W2807987229 abstract "Microwave signals with broadband tunable frequencies and low phase noise can be widely used in communication systems and radar systems. Optoelectronic oscillators (OEOs) with high Q value have the potential to generate the signals meeting the above requirements. In this paper, we present a simple scheme to realize a widely tunable OEO with ultra-high tuning resolution based on stimulated Brillouin scattering (SBS), meanwhile maintaining the low phase noise for all the generated frequencies. By choosing different high-order sideband of the phase-modulated signal as the SBS pump, the frequency of the generated signal can be widely tuned. The accurate frequency tuning can be achieved by changing the drive signal frequency of the phase modulator. As a result, the obtained signal of the OEO with the frequency tuning range up to 40 GHz, and the tuning resolution as accurate as 10 MHz can be obtained. The influence of the SBS gain and the drive signal on the signal phase noise is analyzed theoretically. The effects of the drive signal and the electrical amplifier on the phase noise of the obtained signal are analyzed experimentally. The results show that the noise figure of the amplifier directly affects the phase noise quality of the acquired signal. And the phase noise of the generated signals is lower than -120 dBc/Hz at 100 kHz offset frequency, which has no relation with the drive signal, or the order of the modulation sideband." @default.
- W2807987229 created "2018-06-21" @default.
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- W2807987229 date "2018-06-11" @default.
- W2807987229 modified "2023-09-26" @default.
- W2807987229 title "Generation and phase noise analysis of a wide optoelectronic oscillator with ultra-high resolution based on stimulated Brillouin scattering" @default.
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- W2807987229 doi "https://doi.org/10.1364/oe.26.016113" @default.
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