Simulation of a CuBr–Ne–HBr laser with high pump pulse repetition frequencies

CuBr-Ne-HBr laser with a high repetition frequency of the lasing pulses at a reduced energy deposition in the discharge

“…At a frequency of 60 kHz, 0.3 μs after the pump pulse the flows of reactions (1) and (2) lead to a loss of electrons (see [16,19] for reaction flows) and, considering the inverse reactions, are as high as 3.5×10 13 For more detailed analysis of the processes in the CuBr laser plasma, we calculated critical (limiting) concentrations of metastable copper atoms and electrons. In the calculations of the critical concentrations N D 5/2 , the prepulse electron concentrations were fixed at the values presented in Tables 3 and 4 while the concentration N D 5/2 was varied.…”

“…This occurs due to the reduction of the excitation power with increasing frequency excitation pulses. If the excitation power does not decrease, the prepulse concentrations of the electrons do not decrease either [4,16,19].…”

“…to the active medium of the CuBr laser not only increases the average lasing power twice and more (which appreciably surpasses the effect of additives in the KEL) but also raises the optimum and maximum pulse repetition frequencies [3,4]. Currently, the highest lasing pulse repetition frequency of a CuBr laser is 700 kHz [16,17], which is the maximum value for self-terminating lasers in the visible range. The answer to the question of whether it is a limiting value or allows itself to be increased can be obtained from the analysis of the kinetics of the processes in the plasma of the CuBr laser with hydrogen-containing additives.…”

“…To increase the lasing PRF, the energy deposition in the active medium per pulse should be decreased with increasing frequency. Laser simulation with decreasing energy deposition was performed in [16]; it was found that the energy deposition in a pulse should be decreased with increasing frequency for having higher lasing PRFs, and its record value for this type of laser was obtained (700 kHz) [16,17].…”

High frequency nanosecond pulse generator for CuBr-laser pumping

“…For example, this type of lasers is used as brightness amplifiers in high-speed active optical systems [3][4][5]. In papers [6,7], it was shown that for obtaining high pulse repetition frequency (PRF) of a CuBr-laser (up to 1 MHz) it must be operated in a reduced input energy mode. The prepulse densities of both electrons and metastable copper atoms do not increase with the pulse repetition frequency when the laser operates in a reduced energy input mode [7].…”