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← ScienceWhich outcome occurs when amplifying femtosecond pulses using chirped pulse amplification (CPA)?
A)Pulse duration remains relatively constant
B)Spectral bandwidth becomes significantly narrower
C)Nonlinear effects become substantially reduced✓
D)Gain narrowing effect becomes more prominent
💡 Explanation
Nonlinear effects such as self-focusing are reduced because temporal stretching lowers the peak power during amplification. Therefore, CPA reduces nonlinearities, rather than holding pulse or spectrum fixed, because spectral effects depend less on stretching.
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