A New Method to Measure the Shape of Short THz Pulses: Differential Electronic Gating

Abstract : A simple experimental method has been developed to determine the shape of repetitive picosecond THz pulses in the presence of jitter in the trigger signal. This method, a modification of the recently reported Differential Optical Gating (DOG) method, is based on the femtosecond electronic gating of a high-frequency sequential oscilloscope. Preliminary tests have been performed on pulses from the free electron laser FELIX as well as on pulses from a mode locked p-Ge laser.