Modal analysis of a small surface emitting laser with a selectively oxidized waveguide

K. L. Lear, K. D. Choquette, R. P. Schneider, S. P. Kilcoyne

Research output: Contribution to journalArticle

Abstract

We describe studies of an index-guided ∼4×3 μm2 vertical cavity surface emitting laser with a cw, room temperature 133 μA 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.

Original languageEnglish (US)
Number of pages1
JournalApplied Physics Letters
Volume66
DOIs
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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