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← ScienceWhich outcome occurs when a femtosecond laser pulse encounters optical components?
A)Self-phase modulation broadens pulse spectrum✓
B)Gain saturation reduces pulse intensity
C)Raman scattering shifts central frequency
D)Population inversion maximizes photon output
💡 Explanation
Self-phase modulation widens the laser pulse spectrum because the Kerr effect induces a refractive index change proportional to the intensity. Therefore, pulse broadens rather than changing pulse intensity, because gain saturation affects amplifiers.
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