Laser generating apparatus.

摘要

A sum frequency conversion efficiency can be improved and operation can be stabilized. A laser generating apparatus comprises a nonlinear optical element (3) for generating a sum frequency light from first and second fundamental wave laser lights having first and second wavelengths ( lambda 1) and ( lambda 2) by introducing the above first and second fundamental wave laser lights thereto, and a resonator (7) having a first fundamental wave light source (1) and the nonlinear optical element (3) incorporated therein. The resonator (7) includes at least first and second reflection mirrors (M1) and (M2) disposed on opposing entrance and exit end faces of the nonlinear optical element (3) in an opposing relation. These first and second reflection mirrors (M1) and (M2) having transmissivities as high as possible relative to the second fundamental wave laser light and a sum frequency light. The first and second reflection mirrors (M1) and (M2) have reflectivities as high as possible relative to the first fundamental wave laser light, and incident axes of the first and second fundamental wave laser lights relative to these mirror surfaces are selected to be held on oblique directions which are not coincident with perpendicular lines of these mirror surfaces.