SOLID STATE LASER DEVICE OF INTERNAL TOTAL REFLECTION TYPE

摘要

PURPOSE:To obtain effectively a high quality laser beam devoid of defects in a beam pattern, by coating the flat surface of a solid state laser device of internal total reflection type with a material having a specified reflection index. CONSTITUTION:Coating films 15a and 16b having a reflection index smaller than that of a material forming a laser main body 1 are formed on the flat surfaces 11a and 11b. A laser beam generated by excitation repeats several times the internal total reflections between the flat surfaces 11a and 11b. The amount of a discontinuous phase shift between the laser beam 82a which makes a total reflection at a position where an support 2 is arranged outside the coating films 15a and 15b and the incident laser beam 82b is completly equal to the amount of a discontinuous phase shift between the laser beam 81a which makes a total reflection at a position where the support 2 is not arranged and the incident laser beam 81b. Therefor the partial omission in the laser beam 8b emitted from a partial reflection mirror 7a does not generate, so that the laser beam of superior quality can be obtained.