Optics and Photonics Society of Iran

The experimental results of generation and detection of Terahertz pulses with frequencies that range between 0.01 and 0.9 THz by utilizing GaAs photoconductive antennas are presented and discussed. The antenna is illuminated by ultrashort laser pulses with duration of 80 femtosecond, wavelength of 1040 nm and energy of a few nJ that are provided by a femtosecond fiber laser system. Temporal shape of the THz electric field has been measured with a high signal to noise ratio at lower parts of the spectrum by employing a time resolved pump-probe setup and then the spectral bandwidth has been extracted. Our setup is suited for spectroscopic measurements in both reflection and transmission configurations.