Frequency Stability of Optoelectronics Based on Optoelectronic Hybrid Feedback Control
Optoelectronic oscillators have been extensively investigated for military and civilian applications owing to their low phase noise and adjustable frequency.However,they exhibit unstable output-signal frequencies,which limits their application and widespread use in engineering.Hence,this study investigates the frequency-drift mechanism of optoelectronic oscillators and proposes a frequency-stabilization method for optoelectronic oscillators based on photoelectric hybrid feedback control.This method can realize a stable output under a specific oscillation frequency of a photoelectric oscillator while ensuring low phase noise from the optoelectronic oscillator.Experimental test results show that the stability of the photoelectric oscillator can reach 5.6 × 10-12 daily,which satisfies the application requirement for frequency stabilization in engineering.
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