METHODS FOR OBTAINING MULTIFREQUENCY LASING IN RESONANT CAVITY OF THE THZ LASER

摘要

In a number of areas of radio physics when developing heterodyne devices that use lasers of terahertz frequency range (THz) as radiation sources it is required to obtain a stable distance between the frequencies of the signal and heterodyne oscillation channels. This paper discusses the different ways of the problem solution, in particular, the possibility of the radiation of several losing frequencies from the range of the gain medium emission in the total volume of the gain medium that gives a number of advantages in comparison with conventional methods. The scheme of the THz laser with combined multichannel resonant cavity and the method for obtaining a stable frequency difference in each channel are proposed. Developed multichannel laser can be used in conventional schemes of the interferometers and polarimeters, as well as in other measuring systems where the simultaneous generation of the THz radiation through the different channels with the frequency difference within the amplification band of the gain medium is required. This opens up new possibilities for the use of the THz lasers in the measuring systems.