| 摘要 |
PURPOSE:To improve the laser oscillation efficiency and reduce the overall length of a solid laser element, by forming a plurality of slanting surfaces on each end face of a rectangular plate-shaped solid laser element, each slanting surface slanting in a direction which is different from the direction of travel of the laser beam output from the laser element. CONSTITUTION:A solid laser element 11 has a rectangular plate-shaped configuration. Excitation surfaces 12 which are irradiated with the excitation light radiated from excite lamps are respectively formed on both side surfaces of the element 11. The excitation surfaces 12 are optically polished. Two pairs of slanting surfaces 13a, 13b and 14a, 14b are formed by optical polishing, each of these surfaces slanting in a direction which is different from the direction of travel of the laser beam output from the element 11. The pairs of slanting surfaces 13a, 13b and 14a, 14b respectively define angular laser beam incident/emergent end parts 15, 16 each projecting outwards at a substantially central portion thereof. A highly reflective part 17 which totally reflects the laser beam is disposed in opposing relation to either of the end parts 15 or 16, and a laser beam emerging part 18 which can transmit a part of the laser beam and reflect the remaining beam is disposed in opposing relation to the other. Thus, it is possible to improve the laser oscillation capability and reduce the overall length of the laser element 11. |
