Measurement of parameters of 0.14 THz high-power terahertz pulse

The measuring methods and experimental results for the parameters including frequency and power of 0.14 THz high-power terahertz pulse are presented. Characterized by high frequency, high peak power and short pulse duration, the terahertz pulse is experimentally measured in frequency using subharmonic heterodyne method combined with cut-off waveguide method, while the far-field power distribution of the radiation pulse is obtained by integration method of power density in the radiation field, and then the radiation power of the single pulse is presented. The measured results under certain experimental conditions show that the high-power terahertz pulse has a frequency of 0.146 3 THz, a pulse duration of about 1.5 ns, and a power level of not less than 0.5 MW.