| 摘要 |
PURPOSE:To efficiently emit output laser light by easily regulating the effective length of a non-linear optical crystal element. CONSTITUTION:A inclined surface on which the effective light passage length of a non-linear optical crystal element 12 is changed is formed on end surfaces 12A, 12B through which the basic wave laser light LA(w) of the non-linear optical crystal element 12 is passed as gone in the direction at which the light passage of the basic wave laser light LA(w) is crossed. Sufficiently highly precisely effective light passage length can be regulated even if rough position regulation is practically performed because the ratio of change of the effective light passage length for the movement of the non-linear optical crystal element 12 can be determined by an inclination of the inclined surface. Therefore, easily adjustable laser light source can practically sufficiently precisely be obtained. |
