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Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
Published on: December 15, 2021
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Multi-octave two-color soliton frequency comb in integrated chalcogenide microresonators
Huanjie Cheng1, Guosheng Lin1, Di Xia1
1Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems, School of Electrical and Information Technology, Sun Yat-sen University, Guangzhou, 510275, China.
Frontiers of Optoelectronics
|November 11, 2024
Summary
Researchers developed a novel mid-infrared (MIR) frequency comb using a chalcogenide glass chip. This compact device enables multi-octave spanning for advanced molecular sensing and dual-comb spectroscopy applications.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
- Spectroscopy
Background:
- Mid-infrared (MIR) Kerr microcombs are crucial for molecular sensing due to strong absorption in the MIR band.
- Challenges exist in creating compact, octave-spanning MIR microcombs due to material and laser limitations.
Purpose of the Study:
- To propose and demonstrate a novel slot concentric dual-ring (SCDR) microresonator for MIR frequency combs.
- To achieve phase-locked, two-color solitons in the MIR region using a commercial pump laser.
Main Methods:
- Designed a SCDR microresonator on a chalcogenide glass chip for MIR applications.
- Engineered dispersion to achieve phase-matching and group velocity matching in anomalous dispersion regions.
- Utilized a commercial 2-μm continuous-wave (CW) laser as the pump source.
Main Results:
- Demonstrated a multi-octave-spanning, two-color soliton microcomb from 1156.07 to 5054.95 nm (-40 dB).
- Achieved spectral locking of two-color solitons for enhanced pump wavelength selectivity and control.
- Showcased the device's versatility and broad applicability in the MIR band.
Conclusions:
- The SCDR microresonator provides a viable platform for compact, octave-spanning MIR frequency combs.
- This technology is highly relevant for applications like dual-comb spectroscopy and trace-gas sensing.
- The approach offers precise control over soliton dynamics and broad spectral coverage.
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