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Nonlinear whispering-gallery modes in a microellipse cavity.
Satoshi Sunada1, Takahisa Harayama, Kensuke S Ikeda
1ATR Adaptive Communications Research Laboratories, 2-2-2 Hikaridai Seika-cho Soraku-gun, Kyoto 619-0228, Japan. sunada@atr.co.jp
Optics Letters
|April 10, 2004
Summary
Deforming microelliptical cavities theoretically alters laser characteristics. Stationary lasing states transition from unidirectional to mixed clockwise and anticlockwise waves when disk shapes become elliptical.
Area of Science:
- Physics
- Optics
- Laser Science
Background:
- Understanding laser dynamics in microcavities is crucial for optical device development.
- Cavity geometry significantly influences laser emission patterns and stability.
Purpose of the Study:
- To investigate the theoretical impact of microelliptical cavity deformation on laser characteristics.
- To analyze the transition in lasing states due to changes in cavity shape.
Main Methods:
- Theoretical modeling of laser dynamics within deformed microcavities.
- Analysis of stationary lasing states and wave propagation.
Main Results:
- Microelliptical cavity deformation induces a transition in lasing states.
- The transition is from unidirectional rotational waves to a mixture of clockwise and anticlockwise rotational waves.
- This transition occurs specifically when a disk shape is deformed into an ellipse.
Conclusions:
- Cavity shape is a critical parameter for controlling laser output.
- Elliptical deformations can lead to complex lasing behaviors, offering potential for novel laser designs.