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Observation of spatial modulation instability in intracavity second-harmonic generation
A V Mamaev1, P Lodahl, M Saffman
1Department of Physics, University of Wisconsin, 1150 University Avenue, Madison, Wisconsin 53706, USA.
Optics Letters
|March 27, 2003
Summary
Spatial instabilities and self-focusing were observed in singly resonant intracavity second-harmonic generation. These findings reveal ordered structures in near- and far-fields, confirmed by simulations.
Area of Science:
- Nonlinear optics
- Laser physics
- Photonics
Background:
- Second-harmonic generation (SHG) is a key nonlinear optical process.
- Intracavity SHG offers enhanced conversion efficiency.
- Spatial instabilities can limit device performance and lead to novel phenomena.
Purpose of the Study:
- To investigate spatial instabilities in singly resonant intracavity second-harmonic generation.
- To characterize the observed self-focusing and ordered structures.
- To compare experimental findings with theoretical models.
Main Methods:
- Experimental observation of spatial structures in an intracavity SHG system.
- Mean-field theoretical analysis.
- Three-dimensional numerical simulations.
Main Results:
- Observation of spatial instabilities in singly resonant intracavity second-harmonic generation.
- Evidence of self-focusing.
- Formation of spatially ordered near- and far-field structures.
Conclusions:
- Singly resonant intracavity second-harmonic generation can exhibit complex spatial dynamics.
- The observed phenomena are consistent with theoretical predictions and simulations.
- Understanding these instabilities is crucial for optimizing nonlinear optical devices.