Patent ID: 7991023
Filing Date: 2011-08-02
Classification: B82Y,H01S

Abstract:
1. A quantum dot PIN diode laser comprising: a p doped cladding and an n doped cladding at opposite faces of an active medium, the active medium consisting essentially of layers of a waveguide material between at least one layer of semiconductor quantum dots having an inhomogeneously broadened gain curve; cavity interfaces including an output coupler where a laser output is emitted, for producing a cavity enclosing the active medium, the cavity having a given cavity loss function, a fixed dispersion, and an amplified spontaneous emission (ASE) spectrum; and an electrical power supply connected to the claddings for supplying pump current through the active medium, the current chosen to produce a dynamic group phase change so that within each of at least two wavelength regions where the cavity loss function is majorized by the ASE spectrum, an effective dispersion is substantially constant, whereby multi-band multiwavelength laser emission is produced by the laser diode through the output coupler and within each band the multiwavelength channels are mode locked.