Measurement of current phase distribution for wireless devices using polarization stabilized MO probe

This paper investigates a magneto-optical (MO) probe that has no metal in its construction and comprises a MO crystal and an optical fiber. The MO probe is considered to be well suited to measure the current distribution with high accuracy because of 1) its low level of electromagnetic field invasiveness since no metal is used in its construction, 2) its close proximity to the device under test (DUT), and 3) its micrometer scale sensitive area. The MO probe, however, has a problem in that fluctuation due to optical polarization causes measurement instability. In order to achieve stable measurement, we have proposed employing a polarization stabilized MO probe. In this paper, the current phase measurement employing this probe is performed