Multiline CO2 laser with Q-switching for generation of terahertz radiation

In this paper we consider the method of obtaining THz radiation by difference frequency generation (DFG) of multiline CO2 laser. For this purpose a multiline CO2 laser with Q-switching was created. The three strongest lines, 9 R(18), 9 P(20) and 9 P(22) with wavelengths similar to 9.28, similar to 9.55 and similar to 9.57 mu m respectively, held 85% of CO2 laser power, and can be used to obtain difference frequency at a wavelength of similar to 310 mu m. DFG of other spectral lines fall within the range of 263 divided by 8100 mu m. Different nonlinear crystals for DFG and filters to separate THz radiation were considered.