| 摘要 |
PURPOSE:To make slight the temperature difference in the outer periphery of a laser rod and thus improve the characteristic of asymmetrical property of an outputted laser light by a method wherein the action of heat dissipation is promoted by making rough the surface opposite to the side of facing an exciting lamp for the laser rod. CONSTITUTION:An elliptic reflection mirror 1, composed of split bodies, whose inner surface is formed into a high reflection surface is provided with the exciting lamp 11 and the laser rod 12 in parallel in the form coaxial to the foci of said mirror 1. The side facing the exciting lamp 11 for the laser rod 12, i.e., the -x side shown in the figure is made to remain a smooth surface 14, and the +x side on the opposite side is formed into a rough surface 13 of approx. 0.11mm.. By such a constitution, since the surface whereon the excited light from the exciting lamp 11 strikes most strongly is the smooth surface 14, said light straightly advances inward and scatters at the part of the rough surface on the opposite side. Then, the heat in the neighborhood of this part accumulates and thus helps the increase of temperature. Thereby, the temperature distribution of the part distant from the exciting lamp 11 and that of the part strongly excited close thereto are put into equilibrium, and accordingly the bending phenomenon of the laser rod due to the non equilibrium of thermal distribution is eliminated. |
