Application and modeling of VCSELs in direct modulated optical links
Vertical cavity surface emitting lasers, VCSELs, are very important light sources in optical communications. Their characteristics are very close to high performance edge emitting laser characteristics with low distortion, high modulation bandwidth and high dynamic range. At the same time their price can be an order less thanks to the new technology. This paper introduces the unique properties and application of these lasers in high speed direct modulated optical links. A novel circuit model is also shown, which is capable to simulate the spatial effects, like diffusion and spatial whole burning, in these lasers.