Sequential detection technique to measure the shape of short THz pulses in the presence of a large jitter in the trigger signal

The possibilities and restrictions for the use of the simple experimental method - differential electronic gating (DEG) - developed to determine the shape of repetitive subnano-second THz pulses in the presence of a large jitter in the trigger signal are investigated. This method, a modification of the recently reported differential optical gating method, is based on subpicosecond electronic gating employing a high frequency sequential oscilloscope. As the ultimate test, the shape of 10 ps FWHM THz pulses from the free electron laser FELIX has been measured.