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Alluxa - Optical Coatings LB 8/23
Photonics Dictionary

hole burning

The dip or gap in the profile of a laser beam's line width when it is both homogeneously and inhomogeneously broadened. When an inhomogeneously broadened spectral line is saturated by incident light, the absorption profile of the beam will show a sharp dip because transition saturation is not uniform.
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