Fe super(2+): ZnSe laser pumped by a nonchain electric-discharge HF laser at room temperature

The characteristics of a Fe super(2+):ZnSe laser in a scheme with transverse pumping by a nonchain electric-discharge HF laser at room temperature are studied. Doping of ZnSe crystals with Fe super(2+) ions was performed by diffusion simultaneously through two surfaces under the conditions of thermodynamic equilibrium. It is found that the Fe super(2+):ZnSe laser pulses are modulated by short spikes (3-7 ns at half maximum at low pump energies), whose number decreases and modulation depth increases as the pump energy decreases to a threshold value. A laser pulse energy of 30.6 mJ is achieved at a pulse duration at half maximum of ~125 ns (at high pump energies); the possibility of a further increase in the energy of Fe super(2+): ZnSe lasers pumped by nonchain HF lasers is discussed.