Two-stage dye laser with lamp pumping

The numerical calculations of the shaping spectral-energy features of the radiation of the amplifiers with feedback under the different levels of power of injected signal reconfigurable within band of the reinforcement of the active solution were provided. It is shown that alongside with escalated monochromatic radiation, on amplifier output can exist the broadband background radiation, which level greatly changes at realignment of the frequency of the radiation, and position approximately corresponds to the maximum of the sidebar of the reinforcement. It is founded that level of the background greatly depends on power of injected signal. Herewith accounting minimum level, which provides eliminating the background radiation within enough broad band of the realignment of the system (Deltalambda ~ 17 nm), turned out to be approximately equal 10 kWt. The results of the calculation are match with experimental data. As a result of provided studies were determined criteria, which must satisfy the parameters of injected narrow-band radiation and features of the amplifier with feedback for ensuring the efficient work.