| 摘要 |
PURPOSE:To obtain uniform excitation in a beam section by using a portion whith does not contribute to the reflection of a laser bam of fully reflecting surface as a diffusing surface. CONSTITUTION:Both upper and lower surfaces of a laser element 11 are formed of fully reflecting surfaces 12, 13 made of parallel mirror surfaces, a beam B is fully reflected on the surfaces 12, 13, and input and output in parallel from input/output surface 14. A V-shaped groove 15 is formed in a direction perpendicular to the optical axis on the lower side fully reflecting surface 13 and a diffusing surface 16. The excitation is performed generally in a direction perpendicular to the surfaces 12, 13 in one or two directions. A side 17 is formed in a flat surface to contact a block for cooling the element. The beam B is reflected in zigzag state on the surfaces 12, 13, scattered on the surface 16 except the effective beam, and cannot by coherently amplified to eliminate the low gain of medium. Diffusion in the element of the exciting light L increases on the surface 16 to obtain an uniform excitation. |
