| 摘要 |
PURPOSE:To produce laser light flux having uniform distribution of laser light density even at the time of high output operation by composing a laser reso nance system of a laser medium, a mirror of total reflection and a mirror of partial reflection such that the laser beam advances quadrilateral spirally in the axial direction through a laser medium while being totally reflected sequentially by adjacent side faces. CONSTITUTION:A laser beam L passes through a laser resonance system compris ing a partially reflecting mirror 20, a totally reflecting mirror 30 and a laser medium 10. The laser beam L projected from the partially reflecting mirror 20 to the edge face 13 of the laser medium 10 advance to the right through the laser medium 10 along a quadrilateral spiral path. It is reflected by the total reflection film 15 on the end face 14 then advances to the left through the laser medium 10 along a quadrilateral spiral path and exits from the edge face 13 in the direction of the totally reflecting mirror 30. After the laser beam L is reflected by the totally reflecting mirror 30, the path of the laser beam L is reversed. Laser flux LB is taken out, as the output from a solid-state laser device, from the side of the partially reflecting mirror 20. |
