| 摘要 |
<p>PURPOSE:To provide a measuring apparatus for field intensity which can measure electric field intensity with high sensitivity. CONSTITUTION:A measuring apparatus for field intensity for sensing a change in a refractive index due to an electric field of an electro-optical crystal by laser light to measure spatial field intensity comprises a laser light source and an optical resonator comprising an electro-optical crystal 5 placed between a mirror 3 on a side of an incident direction to which laser light from the laser light source is incident and another mirror 4, wherein the laser light from the laser light source is incident to the optical resonator 2 to measure spatial field intensity by measuring a change in shift in transmitted light or reflected light of the laser light from the laser light source with an optical heterodyne.</p> |
