We report numerical results for the spatiotemporal dynamics of circular-grating distributed-feedback devices with an intensity-dependent refractive index. For the specific geometry and range of variables considered, we find that modulational instabilities do not propagate in these structures. This is due to the 1/r intensity distribution associated with cylindrical waves, which reduces the effectiveness of the self- and cross-phase-modulation nonlinearitics.
|Original language||English (US)|
|Number of pages||7|
|Journal||Journal of the Optical Society of America B: Optical Physics|
|State||Published - 1999|
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Atomic and Molecular Physics, and Optics