Abstract
This paper reports the spatial and spectral characteristics of multimode vertical cavity surface emitting laser (VCSEL) emission using near field scanning optical microscopy (NSOM). We have investigated 15 μm diameter proton implanted 850 nm devices used in 2 Gb/s multimode fiber optic links. We have studied their near field spatial distribution of intensity and the lasing wavelengths of their transverse modes. False colored images were created to portray relative intensity, and spatial distribution information for each transverse mode. Correlation with shear force data allowed mapping of the optical distributions to topographical features of the device. Lasing filaments were observed at high drive currents. Spatially overlapping transverse modes were observed to compete for available gain while spatially isolated modes coexisted.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1429-1435 |
| Number of pages | 7 |
| Journal | Journal of Lightwave Technology |
| Volume | 17 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 1999 |
Funding
Manuscript received January 28, 1999; revised May 10, 1999. This work was supported in part by the NSF under Grant ECS-9625236. K. J. Knopp and D. H. Christensen are with the National Institute of Standards and Technology, MS 815.04, Boulder, CO 80303 USA. G. Vander Rhodes, B. B. Goldberg, and M. S. Ünlü are with the Departments of Physics, Electrical and Computer Engineering, and the Photonics Center, Boston University, Boston, MA 02215 USA. J. M. Pomeroy was with the Departments of Physics, Electrical and Computer Engineering, and the Photonics Center, Boston University, Boston, MA 02215 USA. He is now with Cornell University, Ithaca, NY 14850 USA. Publisher Item Identifier S 0733-8724(99)06332-X.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics