SOLID STATE LASER

PURPOSE:To independently regulate a rotation of a nonlinear optical element and to efficiently obtain a laser light by regulating a rotating angle of the element, providing rotation transmitting means between the element and the regulating means, and energizing to press the regulating means to the transmitting means side. CONSTITUTION:An angle regulating ring 25 for regulating an angle of a nonlinear optical element 22 by rotating an element mount 23 is provided at a rear stage of the mount 23. An O-ring 27 for transmitting rotation of the ring 25 to the mount 23 is interposed between the mount 23 and one end side of the ring 25. A spring 28 is provided in contact with a step 251 formed on the other end side of the ring 25 to always energize the ring 25 to the ring 27 and the mount 23 side. Thus, the regulation of the angle of the element can be independently conducted separately from other optical component.