Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Synchronization of a Silica Microcomb to a Mode-locked Laser with a Fractional Optoelectronic Phase-locked Loop

  • Hui Yang (Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Changmin Ahn (Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Igju Jeon (Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Daewon Suk (Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Hansuek Lee (Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Jungwon Kim (Korea Advanced Institute of Science and Technology (KAIST))
  • Received : 2023.05.02
  • Accepted : 2023.07.24
  • Published : 2023.10.25
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Abstract

Ultralow-noise soliton pulse generation over a wider Fourier frequency range is highly desirable for many high-precision applications. Here, we realize a low-phase-noise soliton pulse generation by transferring the low phase noise of a mode-locked laser to a silica microcomb. A 21.956-GHz and a 9.9167-GHz Kerr soliton combs are synchronized to a 2-GHz and a 2.5-GHz mode-locked laser through a fractional optoelectronic phase-locked loop, respectively. The phase noise of the microcomb was suppressed by up to ~40 dB at 1-Hz Fourier frequency. This result provides a simple method for low-phase-noise soliton pulse generation, thereby facilitating extensive applications.

Keywords

Acknowledgement

H. Yang thanks the China Scholarship Council and State Key Laboratory of Advanced Optical Communication Systems Networks, China, for support in performing the visiting research at KAIST, Republic of Korea.

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