Laser diode stack side-pumped solid state laser
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United States of America Patent
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app pub date -
May 4, 2006
filing date -
Mar 20, 2006
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Abandoned
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Abstract
A side-pumped solid state laser utilizing a laser diode stack of laser diode submount assemblies is provided. The laser gain medium of the solid state laser is contained within a laser cavity defined by a pair of reflective elements. Each laser diode submount assembly includes a submount to which one or more laser diodes are attached. The radiation-emitting active layer of each laser diode is positioned substantially parallel to the mounting surfaces of the submount, causing the fast axis of each laser diode's output beam to be substantially orthogonal to the submount mounting surfaces. The laser diodes can be of one wavelength or multiple wavelengths. Preferably the submount has a high thermal conductivity and a CTE that is matched to that of the laser diode. On top of the submount, adjacent to the laser diode, is a spacer. The laser diode stack is formed by mechanically coupling the bottom surface of each submount to the spacer of an adjacent submount assembly. Preferably the laser diode stack is thermally coupled to a cooling block.
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