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Updated: Mar 28, 2026
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
17.7K
Raman gain induced mode evolution and on-demand coupling control in whispering-gallery-mode microcavities
Optics Express
|December 25, 2015
Summary
Researchers demonstrate all-optical control of coupling regimes in waveguide-coupled optical resonators using Raman gain. This method enhances signal amplification and spectral resolution without mechanical adjustments, benefiting integrated photonic systems.
Area of Science:
- Photonics and Optical Engineering
- Integrated Optics
- Nonlinear Optics
Background:
- Waveguide-coupled optical resonators are vital for optical communication, sensing, and nonlinear optics.
- Controlling coupling regimes is crucial for optimizing resonator performance.
- Traditional methods rely on mechanical adjustments, limiting applications in integrated systems.
Purpose of the Study:
- To propose and demonstrate an all-optical method for controlling coupling regimes in fiber-taper coupled whispering-gallery-mode microresonators.
- To achieve on-demand control of coupling without mechanical movement.
- To enhance signal amplification and spectral resolution in waveguide-resonator systems.
Main Methods:
- Investigated a fiber-taper coupled whispering-gallery-mode microresonator system.
- Utilized Raman gain to all-optically control the coupling regime.
- Analyzed light transmission spectra and Q factor enhancement.
Main Results:
- Demonstrated on-demand control of coupling regimes via Raman gain.
- Observed Q enhancement alongside Raman gain application.
- Showcased improved spectral resolvability and signal amplification through controlled coupling transitions.
- Validated the all-optical approach for fixed-coupling integrated systems.
Conclusions:
- Raman gain provides an effective all-optical method for controlling coupling regimes in waveguide-resonator systems.
- This technique eliminates the need for mechanical adjustments, suitable for integrated photonics.
- The method offers enhanced signal control, improved spectral resolution, and amplification capabilities.
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