Current Optics and Photonics

Optical Society of Korea (한국광학회)
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A Frequency Stable and Tunable Optoelectronic Oscillator Using an Optical Phase Shifter and a Phase-shifted Fiber Bragg Grating

  • Wu, Zekun (Faculty of Information Engineering and Automation, Kunming University of Science and Technology) ;
  • Zhang, Jiahong (Faculty of Information Engineering and Automation, Kunming University of Science and Technology) ;
  • Wang, Yao (Faculty of Information Engineering and Automation, Kunming University of Science and Technology)
  • Received : 2022.05.22
  • Accepted : 2022.09.17
  • Published : 2022.12.25
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Abstract

A frequency stable and tunable optoelectronic oscillator (OEO) incorporating an optical phase shifter and a phase-shifted fiber Bragg grating (PS-FBG) is designed and analyzed. The frequency tunability of the OEO can be realized by using a tunable microwave photonic bandpass filter consisting of a PS-FBG, a phase modulator. The optical phase compensation loop is used to compensate for the phase variations of the RF signal from the OEO by adjusting an optical phase shifter. Simulation results demonstrate that the output RF signals of the OEO can be tuned in a frequency range of 118 MHz to 24.092 GHz. When the ambient temperature fluctuates within ±3.9 ℃, the frequency drifts of the output RF signals are less than 68 Hz, the side-mode suppression ratios are more than 69.39 dB, and the phase noise is less than -92.49 dBc/Hz at a 10 kHz offset frequency.

Keywords

Acknowledgement

National Natural Science Foundation of China (NSFC 62162034); the General Program of the Basic Research Program of Yunnan Province (202201AT070189).

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