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Which mechanism causes fringes blurring within holographic data storage?

A)Material shrinkage during recording process
B)Laser speckle from surface roughness
C)Thermal expansion after laser annealing
D)Scattered beams undergoing path interference

💡 Explanation

Material shrinkage during recording induces fringe distortion on the hologram caused by mechanical stress. This leads to reduced diffraction efficiency of the gratings because the Bragg condition isn't met uniformly, therefore blurring happens rather than preserving data integrity.

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