Extinction coefficient of red phosphorus smoke combined with nanometer alumina to 10.6 μm laser emission

In order to improve the extinction performance of red phosphorus smoke to 10.6 μm laser emission, the extinction coefficients of nanometer alumina aerosols, red phosphorus smoke and their combined smoke to 10.6 μm laser emission were tested in a middle smoke chamber. Results show that, under the air relative humidity of 40%, the extinction coefficients of nanometer alumina aerosols, red phosphorus smoke and their combined smoke to 10.6 μm laser emission with incident power of 1 W are 0.222 m2 · g-1, 0.298 m2 · g-1 and 0.449 m2 · g-1, respectively. It indicates that nanometer alumina combined with red phosphorus smoke improves the diffusion performance of nanometer alumina remarkably, and the extinction coefficient of the combined smoke enhances by 50.7% than that of red phosphorus.