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← ScienceWhich outcome results when a laser beam undergoes spectral broadening?
A)Reduced temporal coherence is observed✓
B)Increased spatial mode purity emerges
C)Enhanced optical power is achieved
D)Improved beam collimation manifests
💡 Explanation
When the laser's spectral broadening is increased, temporal coherence is reduced because the coherence length decreases. This is due to Fourier Transform Limitation; therefore, temporal coherence degrades rather than enhanced brightness, collimation, or spatial purity under this specific condition.
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