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← ScienceWhich consequence results when rapid modulation exceeds mode-locking threshold in a laser?
A)Increased spectral bandwidth emission✓
B)Reduced spatial beam coherence
C)Suppressed amplified spontaneous emission
D)Enhanced carrier-envelope phase control
💡 Explanation
Broad spectral bandwidth occurs because exceeding the mode-locking threshold introduces many quickly-changing longitudinal modes, increasing Frequency Modulation. Therefore, bandwidth broadens dramatically, rather than exhibiting stable pulsed behavior or controlled coherence under the mechanism of mode-locking.
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