Distributed bragg reflector laser, which is tunable in wavelength to be activated selectively virtual diffraction gratings.

摘要

This laser comprises a semiconductor guide layer (4) between two other semiconductor layers of confinement (6, 8) of opposing dopings. The passive part of the laser comprises sections (sc1, sc2 and sc3) each comprising a periodic arrangement (a), spatially modulate the distribution of the carriers or the electric field in the guide layer when a current is injected into the junction p - formed by the other two layers or that this junction is reverse biased. It thus creates a diffraction grating. Each section has an effective optical index cooperating with the diffraction grating corresponding to lead to a bragg wavelength determined for this section. & br / application in optical telecommunications.