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← ScienceWhich mechanism drives spectral narrowing of pulsed laser light?
A)Self-phase modulation broadens the spectrum
B)Stimulated emission narrows linewidth photons✓
C)Spontaneous emission inhibits output power
D)Gain saturation increases linewidth intensity
💡 Explanation
Stimulated emission forces the emission to be coherent; therefore, spectral narrowing occurs because existing photons stimulate in-phase photon production through amplification, rather than spontaneous emission which would prevent coherence from arising.
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