| 摘要 |
PURPOSE:To reduce approximately by half a voltage applied to an electrooptical element by disposing oppositely the two prescribe prisms to form a light resonator. CONSTITUTION:A prism 11 for forming a light resonator has a perpendicular prism including an optical path bending flat source parallel to the edge line of a roof prism, a prism 12 has an optical path bending flat surface perpendicular to the edge line of the roof prism, with the refractive index selected to bring the incident light in coincidence with the polarized surface of the reflected light. An electrooptical element 13 is applied with a voltage for generating the phase displacement of 1/8 wavelength. Accordingly, the light of the polarized plane parallel to a Y-axis from a beam split deflector 14 is polarized elliptically, reflected by the prism 11, and the output light from the element 13 becomes circularly polarized light to be suppled to the deflector 14. Then, the polarized component parallel to the X-axis is reflected as an output laser light 16, the polarized light component parallel to the Y-axis passes as it is through the laser medium 15 and reflected by the prism 12 while maintaining the polarized surface. |
