Abstract
We report numerical results for gain saturation in circular-grating distributed-feedback semiconductor lasers. Our model includes a radially varying nonlinear gain and a uniformly distributed grating loss in the solution of the coupled-mode equations. Our results show that lossy, high-power operation results in an optimum coupling strength for efficient conversion of pump power into useful output power. Our results also show a multimode spectrum for large-coupling strengths, a consequence of mode competition induced by a spatially varying gain distribution. Single-mode selection entails operating at approximately the optimum coupling coefficient determined for efficient pumping.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2147-2152 |
| Number of pages | 6 |
| Journal | Journal of the Optical Society of America B: Optical Physics |
| Volume | 14 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 1997 |
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Atomic and Molecular Physics, and Optics