Patent ID: 6363096
Filing Date: 2002-03-26
Classification: H01S

Abstract:
An article comprising a laser structure for providing a source of electromagnetic radiation, the laser structure comprising:a light-emitting device comprising a plurality of layers including two spaced-apart conductive layers and a light emissive layer therebetween such that incoherent radiation of a first wavelength is emitted from the light emissive device, a substrate disposed adjacent the light-emitting device and having a first and a second side, the substrate being so oriented relative to the light-emitting device that incoherent electromagnetic radiation of the first wavelength emitted from the light-emitting device is received by the substrate at the first side and guided within the body of the substrate to the second side, wherein the substrate is configured such that the radiation is concentrated as it is guided within the body of the substrate from the first side to the second side, and a laser comprising a first and a second cladding region with a core region therebetween, the laser disposed such that the radiation guided to the second side of the substrate is received by the laser, the core region comprising a layer of material selected to absorb the incoherent radiation of the first wavelength and to emit coherent electromagnetic radiation of second wavelength, longer than the first wavelength, in response to the absorbed incoherent electromagnetic radiation; the substrate configured to concentrate the radiation by the substrate comprising at least a first and a second region with a reflective interface proximal the junction of the first and second regions for internally reflecting light within the first region, the substrate being so oriented relative to the light-emitting device that a substantial amount of the incoherent electromagnetic radiation of the first wavelength emitted from the light-emitting device is received by the first region at the first side of the substrate, wherein the radiation is internally reflected at the interface to be substantially confined within the first region and is guided within the first region to the second side of the substrate.