Modal analysis of a small surface emitting laser with a selectively oxidized waveguide
- Sandia National Laboratories, Photonics Research Department 1312, MS 0603, P. O. Box 5800, Albuquerque, New Mexico 87185-0603 (United States)
We describe studies of an index-guided {similar_to}4{times}3 {mu}m{sup 2} vertical cavity surface emitting laser with a cw, room temperature 133 {mu}A threshold current and 53% slope efficiency fabricated using selective wet thermal oxidation to provide optical and electrical confinement. While the device operates strictly single mode, a large number of transverse modes are evident in the subthreshold luminescence observed in both vertical and lateral directions. Despite the lumped nature of the index region, the transverse mode wavelengths agree very well with those predicted for a conventional distributed waveguide structure. Waveguide dimensions and an effective index step of 2% between the active and cladding region are determined by fitting the modal data.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 45962
- Journal Information:
- Applied Physics Letters, Vol. 66, Issue 20; Other Information: PBD: 15 May 1995
- Country of Publication:
- United States
- Language:
- English
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