Yifei Duan, Yafeng Huang, Yanli Li, Yating Wang, Meifeng Ye, Ming Li, Yinnan Chen, Jiaqi Zhou, Lingke Wang, Liang Liu, Tang Li, "All-fiber-based photonic microwave generation with 10−15 frequency instability," Chin. Opt. Lett. 20, 021406 (2022)
- Chinese Optics Letters
- Vol. 20, Issue 2, 021406 (2022)
Fig. 1. Scheme of the all-fiber-based photonic microwave generation system, including narrow linewidth CW laser, fiber-based OFC, high signal-to-noise ratio photo detection unit, low-phase-noise frequency synthesizer. PZT, piezo actuator; EOM, electro-optic modulator; HNLF, highly nonlinear fiber; PPLN, periodically poled lithium niobate.
Fig. 2. Setup of the Er-doped mode-locked laser. WDM, wavelength division multiplexer; EDF, Er-doped fiber; DCF, dispersion compensating fiber; PS, phase shifter.
Fig. 3. Measurement setup of the frequency instability and phase noise.
Fig. 4. Frequency instability characterized by the Allan standard deviation at (a) 6.834 GHz, (b) 9.192 GHz and phase noise at (c) 6.834 GHz, (d) 9.192 GHz. Black line: ultra-stable photonic microwave. Green line: ultra-stable CW laser. Red line: the OFC and the frequency synthesizer. Blue line: the frequency synthesizer.
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