A solid-state laser amplifier includes a solid-state laser rod (1) having an optical axis (8) along which a laser beam propagates. A plurality of pumping sources (3a, 3b, 3c, 3d) have optical axes (401a, 401b, 401c, 401d) that lie in a plane orthogonal to the centre axis (8) of the solid-state laser rod (1) and deviate by a given distance from the centre axis (8). When pumping light is projected onto the axial core of the solid-state laser rod (1), the plurality of pumping sources 3a, 3b, 3c, and 3d are located at equiangular intervals about the axis (8) of the laser rod (1).
展开▼
