Patent ID: 6594299
Filing Date: 2003-07-15
Classification: H01S

Abstract:
A solid-state laser rod excitation module comprising:a cooling sleeve disposed on substantially the same axis as a solid-state laser rod so that it surrounds said solid-state laser rod; a diffusive reflection tube disposed on substantially the same axis as said solid-state laser rod so that it surrounds said solid-state laser rod and said cooling sleeve; and at least a semiconductor laser light illuminating means arranged around said solid-state laser rod, said semiconductor laser light illuminating means comprising: a semiconductor laser light emitting means, provided with a stack-type semiconductor laser including a plurality of bar-shaped (or rectangular) components that are stacked in a direction parallel to the axis of said solid-state laser rod, each of said plurality of bar-shaped components including a plurality of laser-light-emitting portions that are aligned and integrated in a direction orthogonal to the axis of said solid-state laser rod; a semiconductor laser light focusing means, for focusing laser light emitted out of said stack-type semiconductor laser; and a semiconductor laser light guiding means, disposed in said diffusive reflection tube, said semiconductor laser light guiding means including a light incident face with a dimension along said direction orthogonal to the solid-state laser rod axis sufficient to receive light from said plurality of aligned and integrated laser-light-emitting portions via said semiconductor laser light focusing means, said semiconductor laser light guiding means guiding the laser light focused by said semiconductor laser light focusing means and incident thereon to an end portion thereof while substantially maintaining the length of one side of a cross section of said semiconductor laser light, which is running in a direction parallel to the direction in which said plurality of bar-shaped components are stacked, and guiding the laser light toward said solid-state laser rod located within said diffusive reflection tube.