| 摘要 |
PURPOSE:To obtain a laser oscillation equipment which can stably continuously change output wavelength. CONSTITUTION:The equipment is provided width the following; an end mirror(EM)31 which reflects only the light in a specific frequency range, a nonlinear optical crystal 27 which is arranged on the input reflection optical axis of the EM31 and generates parametric light from supplied pumping light (LP), a grating (G)29 which can adjust the angle to the optical axis of output light to spectrally analyze the light outputted from the nonlinear optical crystal, and a total reflecting mirror 30 which totally reflects the specific light spectrally analyzed by the G29 toward the G29. Further the following are installed; a polarization prism 26 which is arranged between the EM31 and the nonlinear optical crystal, reflects the circularly poralized LP and makes it enter the nonlinear optical crystal, a conversion member 28 which is arranged between the G29 and the nonlinear optical crystal, turns the linearly polarized light into a circularly polarized light and turns the circularly polarized light into a linearly polarized light, and pumping wave supply means 21, 23, 24 capable of order selection which generates harmonics of desired order from the fundamental light from a laser oscillating means generating the fundamental light, and supplies the harmonics to a prism, as the LP of polarization characteristics which the polarization prism reflects. |
