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Low threshold optical oscillations in a whispering gallery mode CaF(2) resonator
Anatoliy A Savchenkov1, Andrey B Matsko, Dmitry Strekalov
1Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109-8099, USA.
Physical Review Letters
|February 9, 2005
Summary
We observed low-threshold optical hyperparametric oscillations in a high-Q resonator. This process generates stable, narrow-band light waves due to efficient frequency conversion and Kerr nonlinearity.
Area of Science:
- Nonlinear optics
- Quantum optics
- Photonics
Background:
- Whispering gallery mode resonators offer high Q-factors for light-matter interactions.
- Kerr nonlinearity in optical materials enables frequency conversion processes.
- Four-wave mixing is a key nonlinear optical phenomenon for generating new frequencies.
Purpose of the Study:
- To investigate optical hyperparametric oscillations in a high-Q fluorite whispering gallery mode resonator.
- To analyze the mechanism of resonantly enhanced four-wave mixing.
- To demonstrate the generation of stable, narrow-band beat-note waves.
Main Methods:
- Experimental observation of optical hyperparametric oscillations.
- Utilizing a high-Q fluorite whispering gallery mode resonator.
- Theoretical modeling of the four-wave mixing process.
Main Results:
- Observed low-threshold optical hyperparametric oscillations.
- Demonstrated resonantly enhanced four-wave mixing due to Kerr nonlinearity.
- Achieved stable narrow-band beat-note generation of pump, signal, and idler waves.
Conclusions:
- Optical hyperparametric oscillations can be efficiently generated in high-Q resonators.
- The narrow bandwidth of resonator modes and efficient frequency conversion lead to stable beat-notes.
- The study provides a theoretical model for this nonlinear optical process.