| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric field sensing device in which the optical bias point in its photoelectric field sensor head is optimized, and to provide a method of manufacturing the sensing device. SOLUTION: This electric field sensing device is provided with the photoelectric field sensor head 31 constituted by forming metallic electrodes and Mach-Zehnder interferometer type branched optical waveguides on a substrate composed of an electrooptic crystal, optical fibers 32 and 33, and a laser light soruce 301. This device is also provided with a photodetector 302. The wavelength of the laser light source 301 is selected so that the phase difference between light rays having passed through the branched optical waveguides may become a prescribed value when no electric field is impressed upon the metallic electrodes. COPYRIGHT: (C)2004,JPO&NCIPI |
