Patent ID: 7555027
Filing Date: 2009-06-30
Classification: B82Y,H01S

Abstract:
1. A laser comprising a wavelength-selective element and a semiconductor quantum dot active region comprising a plurality of quantum dots located in a semiconductor matrix; wherein a reflectivity spectrum of the wavelength-selective element has an extended maximum having a spectral position within an optical gain spectrum of the laser active region; wherein the laser is capable of operating on an inhomogeneously broadened ground-state optical transition of quantum dots; wherein a laser emission spectrum comprises a plurality of longitudinal modes with spectral positions close to the extended maximum of the reflectivity spectrum of the wavelength-selective element; wherein a full width at half maximum of the laser emission spectrum has a pre-determined width of at least 15 nm; wherein the full width at half maximum of the laser emission spectrum exceeds a wavelength separation between neighboring longitudinal modes; and wherein an optical power of the laser is at least 100 mW.