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← ScienceWhich problem arises when a high-power pulsed laser hits multilayer dielectric mirrors?
A)Optical breakdown induces material defects✓
B)Fresnel drag skews pulse polarization
C)Chromatic dispersion broadens the pulses
D)Thermal lensing modifies beam divergence
💡 Explanation
Optical breakdown causes defects because intense laser light initiates avalanche ionization, which exceeds the material's damage threshold, therefore ablation and cracking occur, rather than just thermal expansion, which is reversible under lower intensity.
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