Syed Rahim

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Laser science is about directing optical energy.

Pulse Width / Peak Power / Optical Power Diagram

Relationship Between Pulse Width, Peak Power, and Optical Power

Key relationships (regular pulse train):
Pulse energy: E_pulse = P_peak · τ_pulse
Average optical power: P_avg = E_pulse · f_rep
Combined: P_peak = P_avg / (f_rep · τ_pulse)
Optical PowerTimeP_avgP_peak (narrow)τ₁ (short)P_peak (wide)τ₂ (longer)E_pulse ≈ areaE_pulse ≈ area For fixed P_avg and f_rep, shorter pulse width τ ⇒ higher P_peak; longer τ ⇒ lower P_peak Conceptual RelationshipPulse Width (τ)Peak Power (P_peak)Average Power (P_avg)↓ τ ⇒ ↑ P_peakP_peak = P_avg / (f_rep·τ)f_rep (repetition rate) At fixed P_avg and f_rep, P_peak is inversely proportional to pulse width τ.