LASER SOURCE AND CURRENT/MAGNETIC FIELD SENSOR USING THE SAME

摘要

PURPOSE: A current/magnetic field sensor using a laser source is provided to measure various power lines effectively by measuring a beat frequency regardless of the light intensity and the deflected light variation. CONSTITUTION: One end of a resonator is connected to a unit for oscillating two different deflected light modes without a gain competition by the reflection with a deflected light axis of light rotated. An output mirror(440) is connected to the other end of the resonator. A unit for suppressing the oscillation of modes except for the two deflected light mode is included in the resonator. The unit for reflecting light in a rotated deflected axis is a faraday rotation mirror(430) and the unit for suppressing the oscillation of modes is a saturation absorption body(410).