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Updated: Nov 25, 2025
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
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Spectral extension and synchronization of microcombs in a single microresonator
Shuangyou Zhang1,2, Jonathan M Silver2,3, Toby Bi1,4
1Max Planck Institute for the Science of Light, 91058, Erlangen, Germany.
Nature Communications
|December 15, 2020
Summary
Bichromatic pumping extends soliton microcomb spectra. A second laser synchronizes a second comb, enhancing optical power and enabling broadband generation for metrology.
Area of Science:
- Photonics
- Optical Metrology
- Nonlinear Optics
Background:
- Broadband optical frequency combs are crucial for spectroscopy, ranging, and telecommunications.
- Soliton microcombs generated in microresonators offer a compact platform for comb generation.
- Extending the spectral bandwidth of microcombs is essential for advanced applications.
Purpose of the Study:
- To demonstrate a novel method for extending the spectrum of soliton microcombs using bichromatic pumping.
- To investigate the generation and synchronization of a second frequency comb.
- To explore the potential for enhancing optical power in specific spectral regions.
Main Methods:
- Utilizing a microresonator to generate a primary soliton microcomb with anomalous dispersion pumping.
- Employing a second laser in the normal dispersion regime for thermal compensation and secondary comb generation.
- Conducting numerical simulations to validate experimental observations and understand underlying physics.
- Investigating cross-phase-modulation-mediated synchronization between the two combs.
Main Results:
- Successfully extended the optical spectrum of a soliton microcomb via bichromatic pumping.
- Generated a repetition-rate-synchronized second frequency comb.
- Observed passive formation and trapping of a secondary optical pulse.
- Demonstrated the generation of a dispersive wave influenced by cross-phase-modulation.
- Achieved selective enhancement of optical power in specific comb spectral regions.
Conclusions:
- Bichromatic pumping is an effective technique for broadband soliton microcomb generation.
- The method allows for precise control over spectral bandwidth and power distribution.
- This approach offers a versatile alternative for advanced optical metrology and telecommunications.
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