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← ScienceWhich risk rises when a pulsed laser's burst duration increases?
A)Amplified Stimulated Emission dominates signal
B)Photobleaching increases reaction inaccuracies
C)Self-focusing damages optical components
D)Thermal blooming degrades beam quality✓
💡 Explanation
Increased pulse duration enhances the cumulative **thermal blooming** effect because uneven heating raises the refractive index of optical elements, therefore the beam distorts severely because the temperature distribution changes the refractive index, rather than shorter pulses allowing insufficient time for this effect.
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