Kinetics issues of CuBr lasers with added hydrogen

Plasma kinetics mechanisms of an optimized copper vapour laser

“…An abbreviated description applying the genetic algorithm to optimize the CVL is presented as follows. A detailed description may be found in [6,7].…”

“…Table 2 shows the optimized and un-optimized parameters, laser power and efficiency of the CVL [7], where the number of initial chromosomes is M i = 1000, the number of iterations is J c = 60 and the un-optimized parameters are consistent with the experiment. Figure 2 shows the temporal evolution of the optimized and un-optimized discharge current i d through the laser tube, the discharge field E l at the centre of the tube and the input power P e .…”

“…We chose carefully the atomic data one by one on the basis of our previous investigations (e.g. [4,5]) and only those that are consistent with experiments are chosen in our computation, as is presented in appendix A and appendix B.…”

“…CVLs have been applied in many fields [1,2]; for example, in medicine (dermatology and photodynamic therapy), in industrial technology (separating uranium isotopes, pumping Ti: sapphire lasers for tunable output), etc. It has been reported that numerous studies into CVLs have been executed in recent years, including improved self-consistent models for discharge kinetics of CVLs [2][3][4][5], optimization of the CVL head and LC parameters of the discharge circuit by applying a genetic algorithm [6,7], studies of the kinetically enhanced copper vapour lasers employing H 2 -HCl-Ne mixtures [8], the influence of the pre-pulse plasma electron density on the performance of elemental CVLs [9] and investigation of the potential for new ultraviolet laser transitions in Cu II [10], etc. It is interesting and important to optimize the design and develop of the CVLs to obtain excellent characteristics.…”

“…We have optimized a CVL system (including the CVL head and the LC parameters of the discharge circuit) by applying the genetic algorithm to obtain a maximum laser power [7], which has risen from the previous 91 W to 172 W through optimization, and its efficiency was increased at the same time. The phenomenon of the 'black centre', which usually appears in a larger bore laser, was improved or reduced after optimization.…”