Broad-band laser emission from optically pumped PbS1-xSex

Optically pumped lasers operating at 2 K and emitting between 3.9 and 8.6 μm have been produced from PbS
x
Se
1-x
crystals of several alloy compositions. Because the lasers operate with large bandwidths, the results demonstrate that only a small number of properly selected compositions would be needed to completely cover this spectral region.