Application of electro-optic sampling in FEL diagnostics

The electro-optic sampling technique has been used for the full characterization (both amplitude and phase) of freely propagating pulsed electromagnetic radiation (such as FEL pulses, transition radiation) and for the quasistatic electric field of relativistic electron bunches. Measurements of the electron bunch length and shape have been performed with both non-intercepting and intercepting methods. Sub-picosecond time resolution has been obtained with this electro-optic detection technique.