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← ScienceWhich outcome characterizes a laser operating above threshold?
A)Increased photon population by stimulated emission✓
B)Decreased pump energy absorption efficiency
C)Reduced coherence due to thermal variations
D)Suppressed optical amplification within the gain medium
💡 Explanation
Above the lasing threshold, increased photon production occurs because stimulated emission becomes dominant. Therefore, photon population surges in a coherent beam, rather than suppression, because this enables sustained amplification.
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