ELECTROMAGNETIC FIELD MEASUREMENT DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an electromagnetic field measurement device which can accurately and timely detect a circuit operation in a region where electronic devices are mounted with a high density. SOLUTION: The electromagnetic field measurement device includes: a laser beam source; a polarization controller which linearly polarizes laser beams; an optical fiber probe having an electro-optical material or a magneto-optical material at a tip end thereof so that a laser beam reflected by the tip end is subjected to polarization modulation in accordance with the electric field intensity or the magnetic field intensity at the tip end; and an analyzer which converts the laser beam reflected by the optical fiber probe into an intensity-modulated beam. The laser light source has: an optical circulator which emits a plurality of laser beams of different wavelengths by time division and outputs laser beams linearly polarized by the polarization controller, to a multiplexer/demultiplexer and outputs the laser beams inputted from the multiplexer/demultiplexer to the analyzer; and the multiplexer/demultiplexer which outputs laser beams of respective wavelengths to different optical fiber probes and outputs the laser beams to the optical circulator. COPYRIGHT: (C)2011,JPO&INPIT