Electro‐optic sampling of ultrashort high voltage pulses

摘要

High voltage (∼1 kV) pulses having 12‐ps rise time and a duration of 70 ps have been generated and propagated along a suspended‐strip vacuum waveguide. The temporal and spatial profiles of the electric field inside the waveguide have been measured using electro‐optic sampling, with resolutions of 10 ps and ∼1 mm, respectively. The field is found to be predominantly composed of the TEM00mode, and there is no observable temporal broadening of the ultrashort pulse over a propagation distance of several centimeters. The temporal profile exhibits significant high‐frequency modulation which is attributed to theLCresonance of the photoconductive switch.