Disclosed is a vertical cavity surface emitting laser providing mirrors at least one of which has a high reflectivity to be obtained with a small number of pairs each comprising a semiconductor low-refractivity layer and a semiconductor high-refractivity layer, (1) in which GaAs is used for a substrate...http://www.google.es/patents/US5912913?utm_source=gb-gplus-sharePatente US5912913 - Vertical cavity surface emitting laser, optical transmitter-receiver module using the laser, and parallel processing system using the laser
