Atypical CuB-laser lasing mode

An experimental setup for active media on metal atoms self-terminating transitions pumping was developed. It is possible to change the parameters of the pump pulses, which allows implementing new (atypical) lasing features. During the experimental studies, a new atypical generation mode was discovered, which was named the double-pulse lasing mode. This mode appears when the time delay between the preionization and excitation pulses is less than 300 ns. In this case, radiation pulses were obtained from both the preionization and the main excitation pulses. The change of the lasing pulse energy is possible by varying the energy of the preionization pulse. It was found that to obtain radiation pulses with the same amplitude, different energy levels of the additional power source are required depending on the time delay between the pulses. To estimate the power conversion in this mode, the coefficient η was introduced, which is the ratio of the radiation power in the double-pulse mode to the generation power in the pulse-periodic mode. It was experimentally shown that with decreasing time delay the coefficient η increases.