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Above a laser's gain medium critical temperature, which consequence results from weakened stimulated emission?

A)Reduced population inversion efficiency
B)Increased amplified spontaneous emission
C)Enhanced thermal lensing effects
D)Greater spectral linewidth narrowing

💡 Explanation

Reduced population inversion efficiency appears because thermal fluctuations reduce the occupancy of higher energy levels, diminishing the rate of Stimulated Emission; therefore, the optical gain decreases, rather than an increase amplified spontaneous emission, whose rate is less temperature-sensitive.

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