Fig. 1. Experimental apparatus and results of Fe∶ZnSe laser. (a) Schematic of experimental light path; (b) schematic of actual optical path; (c) transmittance curve of #2 crystal; (d) Fe∶ZnSe crystals

Fig. 2. Output characteristics of Fe∶ZnSe laser at 79 K. (a) Fe∶ZnSe laser output energy versus pump energy; (b) Fe∶ZnSe laser output energy versus absorption pump energy; time domain characteristics of pump light (top) and Fe∶ZnSe laser (bottom) when pulse widths are (c) 50 μs and (d) 300 μs; (e) data graph for Fig. 2(c); (f) time domain characteristics of first spike pulses of pump light and Fe∶ZnSe laser in Fig. 2(e)

Fig. 3. Output of laser under different temperatures. (a) Partial time domain waveform of Fe∶ZnSe laser at 150 K; (b) partial time domain waveform of Fe∶ZnSe laser at 273 K; (c) output energy of Fe∶ZnSe laser when pump energy is 430 mJ; (d) Fe∶ZnSe laser spectra

Table 1. Parameters of Fe∶ZnSe crystals