Abstract
The use of an infrared beam to optically probe an acoustic diffraction grating propagating in air is discussed. With the use of acoustic diffraction gratings for providing beam splitting action for intense infrared radiation, the need for determining the homogeneity of gaseous diffraction gratings has arisen. The study was performed at the Bragg reflection angle using a 10.6 μm wavelength CO 2 laser probe and an acoustic diffraction grating of 0.33 mm spacing.
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