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Soliton Microcombs Multiplexing Using Intracavity-Stimulated Brillouin Lasers
Hao Zhang1, Teng Tan1, Hao-Jing Chen2,3
1Key Laboratory of Optical Fibre Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu 611731, China.
Physical Review Letters
|April 28, 2023
Summary
Researchers demonstrate spatial multiplexing of soliton microcombs using Kerr and Brillouin nonlinearities. This compact, low-cost method enables highly coherent dual-comb sources with tunable repetition rates for advanced applications.
Area of Science:
- Nonlinear optics
- Photonics
- Microcavity physics
Background:
- Solitons in microresonators are crucial for nonlinear optical physics and photonic applications.
- Existing methods for generating multiple frequency combs can be complex and costly.
Purpose of the Study:
- To demonstrate spatial multiplexing of soliton microcombs.
- To create a compact, low-cost, and energy-efficient dual-comb source.
- To explore the co-generation of multiple frequency combs.
Main Methods:
- Combining Kerr and Brillouin nonlinearities in an over-modal microcavity.
- Utilizing a single external laser pumping operation.
- Selecting dual-comb modes to adjust repetition rate differences.
Main Results:
- Successfully demonstrated spatial multiplexing of soliton microcombs.
- Achieved highly coherent dual-comb sources with low beating noise.
- Enabled flexible switching of repetition rate differences from 8.5 to 212 MHz.
- Co-generated up to 5 space-multiplexing frequency combs in distinct mode families.
Conclusions:
- The developed scheme offers a novel physics paradigm for comb interferometry.
- Provides a versatile tool for applications in comb metrology, spectroscopy, and ranging.
- Represents a significant advancement in compact and efficient frequency comb generation.
