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Updated: Jun 29, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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Published on: August 5, 2013

High-Power Picosecond Pulsed Kerr Soliton Microcombs.

Liu Yang^1,2,3, Keisuke Ogawa¹, Ryomei Takabayashi²

¹Keio University, Department of Physics, Faculty of Science and Technology, Yokohama 223-8522, Japan.

Physical Review Letters

|February 16, 2026

Summary

This summary is machine-generated.

Researchers explored new ways to generate high-power optical frequency combs using Kerr soliton microcombs in birefringent microresonators. This discovery overcomes limitations in power and efficiency for these compact devices.

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Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

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Published on: December 15, 2021

Area of Science:

Optics and Photonics
Nonlinear Optics
Condensed Matter Physics

Background:

Dissipative Kerr solitons in microresonators are key for generating frequency combs.
Current limitations in output power and conversion efficiency hinder practical applications.

Purpose of the Study:

To discover new operational regimes for Kerr soliton microcombs.
To enhance output power and conversion efficiency.
To achieve picosecond pulse widths and low repetition rates.

Main Methods:

Exploiting strong mode interaction in birefringent crystalline microresonators.
Experimental demonstration of single-soliton microcombs.
Numerical analysis using the Lugiato-Lefever equation.

Main Results:

Achieved average powers up to 24 and 38 mW.
Demonstrated double-digit percentage conversion efficiency.
Observed microwave soliton repetition rates as low as 15.5 GHz.
Obtained picosecond pulse widths.

Conclusions:

Unexplored regimes yield high-power, efficient Kerr soliton microcombs.
Birefringent microresonators are crucial for enhanced performance.
Results advance microresonator frequency comb technology and soliton physics understanding.