Vol.29 No.3(1994.9)
Research Report

For measuring electromagnetic field, a sensor using a Ti:LiNbO₃ integrated optics has several advantages of small size, fast frequency response and minimum perturbation for the field to be measured. Using a novel retroreflective type of Mach-Zehnder waveguide modulator, two small-sized ( 43×16×10 mm, 43×45×10 mm ) electric field sensors have been developed. These sensors were found to have wide dynamic ranges ( 0.01-1000 V/m, 0.6-300 V/m ) and wide frequency band widths ( 30 Hz - 100 kHz, 30 MHz - 1 GHz ).