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← ScienceWhich consequence results when a high-power laser's mode-locking fails?
A)Pulse duration irreproducibly increases✓
B)Spatial coherence vastly diminishes
C)Wavelength bandwidth abruptly plateaus
D)Gain medium saturates prematurely
💡 Explanation
Pulse duration worsens because mode-locking failure causes constructive Interference of many longitudinal modes to vary randomly, therefore the laser produces longer, unstable pulses rather than consistent short bursts, rather than altering bandwidth itself.
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