Subpicosecond Electrical Sampling

We report on the recent advances of an electrooptic sampling technique for the characterization of electrical transients that has now achieved a temporal resolution of .5 ps. Voltage sensitivity is on the order of 50 μV. The electrooptic material is used in a traveling wave geometry as well as in an electrodeless manner, where the electrooptic material probe the fringing field associated with the signal as it propagates along the transmission line.