Journal of Applied Optics, Volume. 46, Issue 1, 62(2025)

Injection locking effect based on coupled optoelectronic oscillator

Jingkai ZHANG1...2, Deqi LI1,2, Tianqi ZHAO1,2, Hongbo LOU1,3, Jiawei ZHENG1,2, Xianzhu LIU1,2, and Tianshu WANG12,* |Show fewer author(s)
Author Affiliations
  • 1National and Local Joint Engineering Research Center of Space Photoelectric Technology, Changchun University of Science and Technology, Changchun 130022, China
  • 2School of Opto-Electronic Engineering, Changchun University of Science and Technology, Changchun 130022, China
  • 3School of Electronic Information Engineering, Changchun University of Science and Technology, Changchun 130022, China
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    A theoretical model of coupled optoelectronic oscillator (COEO) based on injection locking was proposed. The frequency response of the injection-locked COEO was obtained by viewing the optical fiber loop and the injection-locking effect as two cascaded bandpass filter, and the influence of the injection-locking effect on the output characteristics of the COEO was analyzed. In the experiment, the dynamic output range of the COEO under injection-locked conditions was determined by simulating frequency detuning conditions with the help of a tunable optical delay line. The output signal quality of the COEO under injection-locked conditions was investigated by adjusting the signal generator for different injection signal strengths. Under the conditions of injection signal strength of ?15 dBm, the generated side-mode rejection ratios of microwave signal is 59 dB. The phase noise of the injection-locked COEO at near from the carrier signal is ?124.1 dBc/Hz@10 kHz, the spurious mode suppression ratio is 39.3 dB at far from the carrier signal, and the frequency drift is controlled within 15 mHz. When the injected signal strength is ?12 dBm, the generated side-mode rejection ratios of microwave signal is 66 dB. The phase noise of the COEO at near from the carrier signal is ?117.6 dBc/Hz@10 kHz, the spurious mode suppression ratio is 41.2 dB at far from the carrier signal, and the frequency drift is 10 mHz.

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    Jingkai ZHANG, Deqi LI, Tianqi ZHAO, Hongbo LOU, Jiawei ZHENG, Xianzhu LIU, Tianshu WANG. Injection locking effect based on coupled optoelectronic oscillator[J]. Journal of Applied Optics, 2025, 46(1): 62

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    Paper Information

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    Received: Feb. 19, 2024

    Accepted: --

    Published Online: Apr. 1, 2025

    The Author Email: Tianshu WANG (王天枢)

    DOI:10.5768/JAO202546.0101005

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