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← ScienceWhich optical consequence results when laser pumping falls?
A)Decreased beam coherence length✓
B)Increased photon entanglement rate
C)Higher frequency mode oscillation
D)Greater spectral broadening occurs
💡 Explanation
Decreased pumping reduces stimulated emission, degrading temporal coherence because the amplified light becomes less correlated; therefore, the coherence length decreases rather than other lasing properties changing while still above the oscillation threshold.
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