Patent ID: 6920170

Claim:
An orthogonally excited-type laser oscillator comprising: an oscillator case; a pair of optical bases which are installed on opposite sides of the oscillator case and connected parallel with each other by at least three support rods extending in a direction of optical axis, and which respectively support optical parts constituting an optical resonator; a pair of bellows which connect the pair of optical bases with the oscillator case; and coupling members each of which couples a side end of the oscillator case to one of the optical bases when the direction of optical axis of the optical resonator is Y axis, a height direction perpendicular to the direction of optical axis is Z axis, and a direction perpendicular to the Y axis and the Z axis is X axis, wherein each coupling member is configured to restrict a bending movement in the directions of X axis and Z axis and a rotation about the Y axis and to allow a bending movement in the direction of the Y axis and a rotation movement about the X axis and Z axis, the bending and rotation movements being those of each center of sides of the bellows connected to the optical bases with respect to a corresponding one of centers of sides of the bellows connected to the side end of the oscillator case.