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Updated: Dec 12, 2025
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Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
Published on: December 15, 2021
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Vernier frequency division with dual-microresonator solitons
Beichen Wang1, Zijiao Yang1,2, Xiaobao Zhang1,3
1Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, VA, 22904, USA.
Nature Communications
|August 10, 2020
Summary
Detecting high repetition rates of microresonator solitons is challenging. A dual-comb Vernier frequency division method reduces the required electrical bandwidth for optical frequency comb applications.
Area of Science:
- Optics and Photonics
- Quantum Optics
Background:
- Microresonator solitons are key for miniaturizing optical frequency combs.
- High repetition rates (up to 1 THz) are enabled by smaller resonators, benefiting various applications.
- Detecting these high repetition rates is limited by current photodiode and electronic bandwidths.
Purpose of the Study:
- To develop a method for detecting high repetition rates of microresonator solitons.
- To overcome the bandwidth limitations of conventional detection techniques.
- To enable chip-scale optical frequency combs for broader applications.
Main Methods:
- A dual-comb Vernier frequency division technique was employed.
- Free-running 216 GHz "Vernier" solitons were used to sample and divide the repetition frequency.
- Electrical processing of low-frequency dual-comb beat notes was utilized.
Main Results:
- The repetition frequency of a 197 GHz soliton was successfully divided down to 995 MHz.
- The required electrical bandwidth for detection was significantly reduced.
- Demonstrated a practical method for detecting high repetition rates.
Conclusions:
- The dual-comb Vernier frequency division method relaxes instrumentation requirements for microcomb repetition rate detection.
- This technique has potential applications in optical clocks, optical frequency division, and microwave photonics.
- Facilitates the advancement of chip-scale optical frequency comb technology.
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