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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
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A universal frequency engineering tool for microcavity nonlinear optics: multiple selective mode splitting of
Xiyuan Lu1,2, Ashutosh Rao1,3, Gregory Moille1,4
1Microsystems and Nanotechnology Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
Photonics Research
|November 24, 2021
Summary
Researchers developed a new method called multiple selective mode splitting (MSMS) to precisely control light frequencies in whispering-gallery microcavities. This technique enhances nonlinear optical processes by independently tuning multiple cavity modes without altering the overall dispersion profile.
Area of Science:
- Nonlinear optics
- Quantum optics
- Photonics
Background:
- Whispering-gallery microcavities enable efficient nonlinear optical processes.
- Controlling cavity mode frequencies is crucial for satisfying energy conservation in these processes.
- Current methods alter global dispersion, potentially causing unwanted effects.
Purpose of the Study:
- To introduce a novel frequency engineering tool for microcavities.
- To achieve independent and targeted control over multiple cavity mode frequencies.
- To enhance desired nonlinear optical processes and suppress competing ones.
Main Methods:
- Demonstration of the multiple selective mode splitting (MSMS) technique.
- Independent frequency control of up to five cavity modes.
- Utilizing optical quality factors exceeding 10^5.
Main Results:
- Achieved controllable frequency shifts up to 0.8 nm.
- Demonstrated independent splitting of multiple cavity modes.
- Showed suppressed frequency shifts for untargeted modes.
Conclusions:
- MSMS provides independent control of cavity mode frequencies, separate from global dispersion.
- The technique offers precise tuning for enhancing specific nonlinear optical processes.
- MSMS is broadly applicable across various material platforms and nonlinear phenomena.
