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Which risk increases when a pulsed laser weakens coherence?

A)Speckle formation is more significant
B)Power fluctuations increase near threshold
C)Average beam divergence will decrease
D)Absorption rates inside cavities will oscillate

💡 Explanation

Sustained coherence concentrates energy within a precise bandwidth; pulsed weakening alters temporal pulse shape because amplified spontaneous emission broadens the spectral bandwidth, therefore power instability becomes more apparent near the lasing threshold rather than mode-locked operation.

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